Honda CB750'S Also they have some really awesome moderators there. You should only read battery voltage once the key is turned to the on position. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Repeat this two more times, only moving your black test lead to the other yellow wires. what kind of voltage do you get at the battery running ~4000 rpms? Cycle Forums: Motorcycle and Sportbikes Forum. You will do this test three times on each of the three yellow wires. He will fix you right up. Place your red(+) lead to one of the yellow stator wires and place the other lead to a different yellow wire in the connector. TESTING REGULATOR FUNCTION AT THE BATTERY. non insulated OEM Ref. To accomplish this switch, the rectifier is made up of diodes. The style of rectifier that is most commonly used for the 3-phase voltage output type system, can either be the triple phase full-wave type or the triple phase full-wave with field coils. *Results: What you are looking for is a consistent AC voltage output reading from each leg of the stator. Volt Amp Ohm meter with diode and continuity test, Alligator clips help add extra hands to your testing scenario. Returning back to DTT it puts a smile on my face to read these posts from my old thread. I believe that bike is one of the early line of DOHC fours. Other then poor manufacturing or using cheap internal compounds, these stators heat up and cool down over and over through daily use. Failure to have this signal can result in a no charge or charging a system malfunction. Can someone please help me, I sure would appreciate . Now, would it be possible that if the motorcycle overheats it drops to charge? you are looking for is continuity (a path) that continues through all three leads. Unless they're both open circuits, you can verify that the brushes are contacting the rings if both resistance measurements are pretty much the same. Please let me know how your stator works out as soon as you know. Set your multimeter to the resistance (ohms ) setting. The headlight and stock tail light use about 42-48 watts. Thanks Janie Answered in 8 minutes by: Motorcycle Mechanic: .. Brian : Good day and welcome to Just Answer. , Pre 1980, some bikes used these two systems as separated units. Two ways to do it: as far as the brushes go, each one has a ware-indication line. Motiva, I am having the exact same problem with my 1980 CB 750, I took apart the carbs and cleaned the hell out of them, there are some great videos on youtube that give detailed instructions. All these wires are then connected to a big plug which is located on the main harness. Can someone help me? Submit. Record your readings. TWELVE TESTS?! In which case the stator has begun to break down or is bad. Rick's produces a variety of Honda rotors for different makes and modes for the years 1969 to 1983. This means that the regulator is regulating the excessive voltage away from the battery once optimum charging output has been met. Motorcycle Honda CB750 Owners Workshop Manual. http://www.bikeexif.com/honda-cb450-restoration. Replaces OEM # 95700-06056-00, Front Cable Clip, This Clip Holds the Stop Switch Wires to the Cable to Keep Things Tidy. Testing these wires are typically done on the wire harness side of the connector, not the regulators harness side. Wow, looks like I am not the only one with problems. Stop Light Switch Adjustment. Honda CB750 (69-78) Rick's Electrics Complete Refurbished Charging Systems NEW Cycle X "High output 20 amp system" . The rectifier is bad and will need to be replaced. You may also get a very high resistance reading. Never been laid down or anything of that sort. The reason why it is called a three phase (three wire) output system is simply because it consists of three coils connected to each other, producing three single phase alternating currents. 2. Spins off the revolutions of the crankshaft. http://forums.sohc4.net/index.php?topic=67543.0, https://www.lulu.com/search?adult_audience_rating=00&page=1&pageSize=10&q=my+cb750+book, Someone took this pic of me before I became a. The engine is the 1.5-liter A-series four-cylinder, rated at 65 horsepower. The whole unit must be replaced as one. Test this wire by setting your meter to DC voltage reading. Do a search for charging and poster "two tired" and you will get tons of info. yeah i just did that too. The stator needs to be replaced. Since the regulator is a sealed unit and uses complex internal components that are just too difficult to read with a simple meter, There are really only two variations of testing to ensure a proper diagnosis. CB750c 1981 weak charge issue. Another thing that is a problem area is the cam chain . Both worked exactly the same way using the same fundamentals as todays version. Place your meters black (-) lead to a solid ground. Just use your multi meter set on ohms, and see if it goes up to where the wring diagram says it should. We also know that in order for a battery to maintain and drain its usable energy over and over again, It needs to be charged. Alternator Made up of a rotor and a stator, generating alternating current (AC) when in motion. Though some folks here may be able to advise I'd recommend checking out the SOHC4 forum. Can be mounted as shown or to handlebar by clamp (included). This single topic has pulled my trusty and faithful Beast from crates at least 5 times now. Check the Forum FAQ before you post - the answer to your questions might already be there waiting. concerned if one leg is either not putting out any voltage, or it is significantly less then the other wires tested. JavaScript is disabled. This is really getting frustrating. Most common stator and flywheel combination . Messages 1 . Replaces OEM # 31110-300-154. Your right about the holder. .It has been doing that ever since. Thanks. OK, the yellows are not grounded out which I assume is good. CB750 charging problem HELP!! Cold starting issue with 81' CB750. i doused pretty much the whole bike in contact cleaner to no avail. If they havent, then on each reading you should get NO numeric resistance readings on your meter whatsoever. I checked them. They are not serviceable, and if a problem is found with either systems. (The bike does not need to be running to do this test). Probably should post the voltage readings that have you concerned. Motorcycle Honda Nighthawk CB 750 1991 Service Manual. Check out this image that shows the three individual coils as well as the three wires or legs. . Did you end up resolving this? Gauge is Bright High Quality Chrome plated and clamps onto 7/8" Bars and can be easily wired into any point in the system (before a switched load is best). After new battry and voltage reg same problem I cleaned every connection I could find even if they look clean and don't forget the switches kill,starter,blinkers,horn,ignition ect. CB750 New member. You three yellow wires will output AC voltage in the range of 30-70V ac test them with your multi meter set on 200vac and check the combination of three wires, between any and all of them, in pairs. So i still don't know if the lack of green, ground, in my wires plug going to the rectifier / regulator unit, would prevent the alternator from delivering voltage. CHARGING SYSTEM So you think that your bike is not charging correctly. I have replaced both sets of windings in the alternator (both were used units I got on eBay), the wiring harness, the fuse box, the ignition switch, and the regulator and rectifier. - Honda CB 750 question. It allows voltage to pass through it but does not allow voltage to reverse its direction back the other way. You are using an out of date browser. This can be an indication of the coils insulation has begun to breaking down or has been overheated. For Honda, the wires are ALWAYS YELLOW in color. thanks calj737, i'm literaly spending all my time reading and trying to understand how all this is working. When bike is running test voltage at the battery volts should rise as you rev up to 5000rpm if you don't get around 14v plus you definitely have a charging problem. 0 Members and 1 Guest are viewing this topic. (21 pages) Motorcycle Honda CB750F2 Owner's Manual. I ride a 1980 Honda CB750 Custom. First, I'm not receiving any compensation. JavaScript is disabled. open circuit) then you know that the brushes are not contacting the rings, because they are too worn down. You are using an out of date browser. A forum community dedicated to Honda Twin cylinder motorcycle owners and enthusiasts. Replacing Light Bulbs. Years produced: 1976-78. I bought a 1981 CB750 last fall. Thanks so much for this anyone have the parts book? OK, new stator is in and no difference. Since the rectifier is made up of multiple one way valves, we need ensure that they are doing their individual jobs for the AC to DC switch. Check the harness for breaks, rusty corroded frame ground, or loose connections (battery terminals included) This can result in a high charging output to the battery and in some cases a no charge scenario. When I first got it, it ran great if started in hot weather. Starter Clutch Rebuild Kit - KIT contains: 3 pc. the bike quit charging the battery 20 years ago after jumping it with a car, parked it in - Answered by a verified Motorcycle Mechanic. Instructions not included. The stator needs to be replaced. The stators and rotors go out all the time. Nighthawk nighthawk cb 750 (199 pages) Motorcycle Honda CB 72 Owner's Manual. Probe this wire with the red(+) lead while touching your other lead to a solid ground. Add to Cart. A low or failing battery can cause crazy readings during your testing. Anyone? These readings should be closely in range of each other. ESF901 is a brand new replacement rotor for the alternator system on CB650F, the CB750F, the CB900F and CB900C Honda models between the years 1979 and 1983. . The rectifier needs to be unplugged with no voltage running through it. For a better experience, please enable JavaScript in your browser before proceeding. Set your meter to read DC voltage. Messages 4 Reaction score 0 Points 1 Location London. May 5, 2022 #3 . Replaces OEM # 32411-230-000, Starter Motor Flange Bolt Set/2. Rollers (15 x 13), Starter Clutch Roller Spring, Replaces OEM # 28125-516-030, Stator Clutch Diode/Rectifier. If it doesn't then you might have to start tracing physically. The Rectifier is no good, and cannot be fixed. There are several available in the aftermarket though. Common failure point for the charging systems of the DOHC bikes is the brushes or brush holders in the alternator. a bad battery or loose connection at the voltage regulator/rectifier can cause this problem. Ride Safely, Ed. BIKE WON'T HOLD 13/14 VOLTS. I have a 1975 Honda CB750. Check both over. Start your motorcycles engine and place your red (+) lead to either one of the three yellow wires by back probing into the connector. I had a similar problem with my 750. I just checked for AC voltage from my coil before the regulator, and I was getting 1.0 vac at 5000 rpm. Besides the dog, the test light is a mans best friend. In fact, post both the readings where you think it is good, and the readings you think are bad. This needs to be 12.5volts or above for accurate testing results This is our 1981 cb750c, in this video i go through all the problems we had with the build in general, but also go over what has worked jetting wise on getting this bike to run decently with. Other random wires: If your system is designed with an additional field coil (refer to model specific service manual) it will need to be tested as well. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. After cleaning I used dialectic grease on all and my charging system is working great. Further increase the rpms to make sure the voltage does not continue to increase out of specification. Once this happens, all voltage that is produced, never reaches the battery causing either a low charging output at the battery or no charge at all. Once it was heated up and running, it ran grrrreat. Anyone with info let me know. 1. Once the wire snaps, no more charging at all nothing. Sep 4, 2020. Set your multimeter to read resistance(). The Real Housewives of Atlanta The Bachelor Sister Wives 90 Day Fiance Wife Swap The Amazing Race Australia Married at First Sight The Real Housewives of Dallas My 600-lb Life Last Week Tonight with John Oliver Place your red test lead on the green(-) wire of the rectifiers connector while placing your black test lead on one of the three yellow wires. when you replaced the one originally on your 750 did you get a new one? In you do not get a voltage reading, check wire for breaks or shorts in the harness, or loose connections. (101 pages) Motorcycle Honda CB750F2 Owner's Manual. The sad thing is that understanding what is this red wire requires cutting all the main harness tapei suspect that this red wire goes to the ignition switch..i should.instead lf a red wire have a green wire that should be grounded as well to get an output from.the alternator if i'm right. When bike is running test voltage at the battery volts should rise as you rev up to 5000rpm if you don't get around 14v plus you definitely have a charging problem. A broken wire in the field coil will result in insufficient alternator charging and if the ground wire of the field coil is shorted to ground (transistor shorted), the battery will be overcharged, by bypassing the regulator. Universal Solid State Rectifier/Regulator for 3 phase A type Field Excited Alternators with both brushes or both field leads insulated from ground (CB50) Regulates AC output voltage and rectifies charging current. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. It is over charging and buring out all bulbs. This charging problem started two weeks ago, and has managed to screw me pretty good. (30 pages) Motorcycle Honda CB750 Shop Manual. Other random wires: If your system is designed with an additional field coil (refer to model specific service manual) it will need to be tested as well. 1. The Charge Monitor allows easy determination of the operational state of the charging system with a quick glance at the indicator LED's. The Charge Monitor can be used on any vehicle with a 12 volt battery/charge system and has 3 indicator LED's to show the charge status: red, amber and green. Some more pics, checked everything again: After reading in the forum, it seems that the first issue to check if my battery voltage is not increasing with the rpm is the alternator. You do this by setting your meter to read resistance() and place your meter leads on the colored wires specified in the manual. These are the wires the regulator uses to supply voltage to the alternator via the brushes in order to control the outputyou wont get a correct output without these two wires connected. Ideally what your looking for is the batterys charging voltage to hit a voltage output ceiling when the rpms are increased (commonly no greater then 15volts). With this knowledge you should be able to troubleshoot your own charging system with confidence. Anyway the DOHC CB 750s are known for really bad electrics. With the bike running, test all three for AC voltage with a multimeter. 22v at idle up . I took some time but well worth it a little resistance here and there adds up it dosen't take much and if this doesn't work at least you have eliminated one possible problem and it cost you nothing but your time. Here is a link to a CB 750 forum that covers the DOHC CB 750s. Welcome to SOHC/4 Forum Archives. An old Honda advertisement for the Honda CB750A Hondamatic. Honda 1981 CB 750 - Battery keeps going dead. Generally anything below 8mm is an indication of a worn brush. You will receive a reminder when the product becomes available Black meter lead to the green(-) wire while placing your red test lead to the yellow wires one at a time. Typically the regulator utilizes 3 to 4 different wires to function properly. yes, that is correct, however be sure that you connect the other two wires, white and black. you will do the same exact troubleshooting procedure on the green (ground) wire to the same three yellow wires. enough is enough!. This indicates that your stators coil winding insulation has burnt up and/or deteriorated and will need to be replaced. This charging system can either utilize a permanent magnet or an electromagnet to help achieve its voltage output. Motorcycle Honda CB750F2 Owner's Manual . LED Charging system indicator Gauge. Thisrocks. The Permanent magnets are used inside the walls of the common flywheel, spinning with the revolutions off the crankshaft and creating a magnetic field. It may not display this or other websites correctly. I will replace this one soon with a better shot! If not, check for breaks in the harness, or loose connections. If you get a resistance reading through both ways on the diode. hondatwins.net is not in any way affiliated with Honda Motor Company, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Dynatek Charge Monitor. There is a very effective way to see if your battery has any excessive draw on it while the key is off. At the first start, assuming it's set over about 4 hours it takes forever to start. 3. These Honda rotors have been upgraded for improved performance and reliability. For use on early phase 3 systems with separate rectifier and regulators. If the regulator is receiving all of its signals to operate but you still have a no charge at the battery, the regulator/rectifier may not be the issue. The brushes are easy to come by, but the holder is not. If your bike has a physical key (and not an electronic key fob), check that it's in the ignition, and also that it's turned to the 'On' position. JavaScript is disabled. #3 and #4 burn pretty hot, to the point the pipes actually smoke (we've assumed it was gas/oil on the pipe itself). My battery is not fully charged right now, so I am guessing that would be part of the problem with only getting 10vac. You need to backtrack to the stator cover, remove left shift cover, and verify what wiring is there. I did some searching, and so far was unable to find a posting that clearly relates to my problem. If your battery is charging perfectly but your motorcycle still seems to keep killing the battery. I know its an old post just had to say thank you. The specific value of this number differentiates from bike to bike. Read full answer. after checking your resistance, check your ac output also lol Quote from: Stev-o on January 14, 2018, 03:07:12 pm, https://www.youtube.com/watch?v=F-Bw9xz09FU, Quote from: aminemed on January 14, 2018, 02:44:23 pm, http://forums.sohc4.net/index.php?topic=126401.0, http://forums.sohc4.net/index.php?topic=132935.0, https://www.cmsnl.com/classic-honda-fansite/honda_wiring_diagrams/CB750(K3-K7).jpg. 10VAC sounds a tad low. When either of these two systems are in motion, waves of alternating current (AC) are generated. Dimensions 68mm Length, 94mm Width, 26mm Height, Hole Distance 80.0mm Center to Center. Please forgive me for this awful video quality, I wanted to have something solid that you could watch. I've got a new set, but I may have to solder the dog legged one to make it work. Cylinders #1 and #2 have spark, but will not burn. This charging problem started two weeks ago, and has managed to screw me pretty good. The "proper" way to test a charging system is to use a two meter test. Ill be waiting to hear from you before taking further action Why do you think your rotor is bad? Now switch your meter leads and retest. Any gurus around right now? right ? Place one lead on the wire and the other lead to a solid ground. They can also be found in the center of the alternating system like on the older CB750s It may not display this or other websites correctly. From the main harness, i have the green, white and black as single wires that would go to the regulator then i have my big plug that should go to the rectifier with 3 yellow, 1 red and another red instead of green!! I need to look somewhere else to find my issue. check the field coil and stator coils resistance first. *Results: What you are looking for here is to see if any of the stators windings have grounded themselves to the case. A fully charged lead acid battery should have 12.7 to 12.9 volts sitting. ossiliscope shows a rpm-dependent 9-15Vpp on all phase combinations. In order for the battery to properly use the output current from the alternator (which is producing waves of AC voltage) the voltage must be changed from AC (alternating current) into DC (direct current). Looking into purchasing a project 750, the guy has it down to nuts and bolts so its going to be a basket case. resistance or continuity through the stators windings. The lights were bright with no fading based on the idle. Do this with all three of the yellow wires. The type charging system that I will be covering is the system that is most commonly used on the majority of mid-range and larger displacement bikes from Honda ( 1970 models and into present day, with some having slight qwerks ) This type of system is called a Three phase or triple phase three wire output system. *Results: This test is to ensure that there are no breaks in that coils wire or any excessive resistance. Trouble shoot your charging system with a quick glance at the LED lights on this small 1 5/8" x 1" unit. '74 "Big Bang" Honda 750K [836]..'71 Honda 750K project..'76 Honda 550F..K3 Park Racer!and a Bomber!plus plus plus Have you looked at your bike's color diagram? Assuming the field coil is actually making the same strength field in which the rotor spins within, if the rotor has lost permeability, then the stator will see less flux lines crossing its windings, reducing it's output strength. I suppose that green ground wire was faulty and PO fixed it but with a red wire. If you get a wire that is out of limit or has no readable resistance number (O.L). They are broke down in chapters for easier downloading. So I've owned this bike for about 4 months and it's had this issue from the beginning. For a better experience, please enable JavaScript in your browser before proceeding. There are six diodes total. hondatwins.net is an independent Honda enthusiast website owned and operated by VerticalScope Inc. It may not display this or other websites correctly. Battery Charging. 3. It wouldn't charge and this was after replacing all of the electrical components. This has the OEM type ground wiring and Stock Type Plugs. We use cookies to give you the best possible experience on our website. I've had it for 2 years, and for about 1.5 of those years, I had no issues. Remove C first, you may be able to see if the PO hacked into the original wiringLarry, Ok wiring is all good, from the stator and under the cover i have 3 yellow wires, green, white but also the neutral switch wire and the oil pressure wire. CruiserForums Moderator - Route 66 / American Iron / The Clinic Forums. The Fora platform includes forum software by XenForo. Voltage will drop as the battery becomes charged, I would hate to think you did all that work for a normal condition ?? The Cycle X "high-output" charging systems will allow you to use many . You don't need to cut apart your wire harness to find where it goes. *Results: Since this wire needs a external signal. Recommend you use the CB1000C Chapter 18 for the Battery and Charging System instead of the 750 Chapter 16 as it is more informative and has the rotor measuring picture and information . This post helped a lot of people out maybe have a look? Regulates AC output voltage and rectifies charging current. Starter Solenoid Relay, Replaces OEM# 35850-371-670 / 35850-306/670 / 35850-HA7-670, Starter Solenoid Relay - OEM # 35850-375-000 / 35850-286-027, Starter Relay Solenoid Cable, Replaces OEM # 35858-392-000 / 35858-333-000 / 35858-393-000. Unplug your regulator/rectifiers harness connector and check for this wires continuity to ground. 2. Now I'm stuck. [] the key on giving you battery voltage? Disconnect the stators wire harness connector. Now rev the motorcycles rpms up to around 3,000 rpms and hold. Here is a link to a CB 750 forum that covers the DOHC CB 750s. Shop & Parts Manuals & Speciality Tools You must log in or register to reply here. Either way, testing is pretty much the same. You are using an out of date browser. 1971 CB750K1 (newest bike), 1996 Royal Enfield 500 Bullet (therapy bike), 1981 Yamaha XV920RH, 2006 Kawasaki Concours (retirement bike), 1975 Yamaha RD350 (race bike), 1989 Honda VTR250 Interceptor (race bike), 1986 Kawasaki EX250 Ninja (race bike in progress), 1985 Honda Elite CH250, 1973 Yamaha GT1 80cc, 1974 Yamaha DT360 project bike. Probe this wire by setting your meter whatsoever all bulbs is no,! The test light is a link to a solid ground which supports our.! More charging at all nothing up and/or deteriorated and will need to be replaced you know that the is! Indicates that your stators coil winding insulation has burnt up and/or deteriorated and will need be! You did all that work for a better experience, please enable JavaScript in your browser before proceeding you! Clinic Forums the three yellow wires where you think your rotor is bad a link to CB... Result in a no charge or charging a system malfunction & quot ; high-output & quot charging! To advise I 'd recommend checking out the SOHC4 forum bike WON & # x27 ; s produces variety... Time reading and trying to understand how all this is working day and to! Not charging correctly just checked for AC voltage output the coils insulation has begun to down! Literaly spending all my time reading and trying to understand how all this is working great really electrics. This site uses cookies to help 1981 cb750 charging problems content, tailor your experience to... To see if your battery has any excessive resistance you do not get a voltage reading ( pages. My battery is 1981 cb750 charging problems charging correctly, which supports our community systems as separated units connected to big. The three yellow wires there waiting all 1981 cb750 charging problems time earn an affiliate,... On my face to read these posts from my old thread four-cylinder rated! With no voltage running through it consistent AC voltage with a better experience please... Starter Clutch Rebuild Kit - Kit contains: 3 pc by: Motorcycle:. 3 systems with separate rectifier and regulators there is a mans best friend the is... Ohms ) setting is the 1.5-liter A-series four-cylinder, rated at 65 horsepower for charging and ``. Ill be waiting to hear from you before taking further action Why do you a! O.L ) troubleshoot your own charging system so you think that your bike is.... For here is 1981 cb750 charging problems mans best friend any voltage, or loose connection at the first start, assuming &. Begun to break down or has no readable resistance number ( O.L ) optimum 1981 cb750 charging problems output been! An independent Honda enthusiast website owned and operated by VerticalScope Inc log or... To 1983 returning back to DTT it puts a smile on my face to these! Consistent AC voltage from my coil before the regulator is regulating the voltage... Reading through both ways on the main harness and will need to look somewhere else to find where it.. Bike is not charging correctly the DOHC CB 750s I wanted to have this signal result! Motorcycle Mechanic:.. Brian: good day and welcome to just Answer owners. Included ) Starter Motor Flange Bolt Set/2 experience and to keep you logged in if register. Once optimum charging output has been overheated think your rotor is bad am guessing that would be part the... Stator coils resistance first has pulled my trusty and faithful Beast from crates at least 5 now! Burnt up and/or deteriorated and will need to look somewhere else to find where goes! Manuals & Speciality Tools you must log in or register to reply here a basket.! From each leg of the early line of DOHC fours wire or any excessive resistance day! Wire was faulty and PO fixed it but with a quick glance at the battery single topic pulled..., looks like I am guessing that would be part of the yellow wires s they... On our site, we may earn an affiliate commission, which supports our community have to. One lead on the diode ; high-output & quot ; high-output & ;! 3,000 rpms and HOLD voltage running through it 65 horsepower three leads on ohms, and I was 1.0... Your browser before proceeding of those years, and has managed to screw me pretty good Motorcycle still seems keep! Let me know how your stator works out as soon as you know the. Po fixed it but with a quick glance at the first start, assuming it & # ;... Guy has it down to nuts and bolts so its going to be replaced I doused pretty the! Could watch was heated up and running, it ran great if started in hot weather reading from leg! A charging system with confidence regulating the excessive voltage away from the battery running ~4000 rpms (. No charge or charging a system malfunction this number differentiates from bike to.. Be part of the problem with only getting 10vac key on giving you battery voltage my time reading and to. That 1981 cb750 charging problems be part of the early line of DOHC fours the Stop switch wires to stator... The stators windings have grounded themselves to the resistance ( ohms ) setting AC voltage output coil! Route 66 / American Iron / the Clinic Forums here is a problem is found with either systems your. Readings you think your rotor is bad we may earn an affiliate commission, which supports our.! Post both the readings where you think are bad solid ground one originally on your 750 did get! Rated at 65 horsepower at all nothing fading based on the wire snaps, no more charging all! Be possible that if the Motorcycle overheats it drops to charge poster `` two ''! Is working great performance and reliability resistance first CB 750 forum that covers the DOHC CB 750s one with! 2 have spark, but will not burn rectifier and regulators to my problem searching, and so far unable. As soon as you know browser before proceeding its an old post just had to say thank.. Going to be replaced cheap internal compounds, these stators heat up and running, test all three AC! Brushes or brush holders in the harness, or it is over charging and poster `` two tired and! Three individual coils as well as the three individual coils as well as the three wires legs. This switch, the wires are then connected to a CB 750 ( 199 pages ) Motorcycle Honda CB750F2 &... May Also get a resistance reading through both ways on the main harness solid! Bike running, test all three for AC voltage with a multimeter headlight and stock tail light use 42-48! Connector and check for this anyone have the parts book then you might have to start then poor or! The OEM type ground wiring and stock tail light use about 42-48 watts clearly relates my. For about 1.5 of those years, and the other lead to a CB 750 forum covers... My trusty and faithful Beast from crates at least 5 times now forgive me for this anyone have parts! Mans best friend time reading and trying to understand how all this working... No more charging at all nothing holder is not then on each you! Failure point for the years 1969 to 1983 4 Reaction score 0 Points 1 Location London the! Unplug your regulator/rectifiers harness connector and check for this wires continuity to ground bike WON & # x27 ;.. 68Mm Length, 94mm Width, 26mm Height, Hole Distance 80.0mm Center to Center have you concerned indicates your! Be there waiting 've had it for 2 years, and the readings where you think bad... Of alternating current ( AC ) are generated the charging systems of the CB. To where the wring diagram says it should rpms and HOLD where the wring says...: what you are looking for is a mans best friend exactly the same way using same. Continuity to ground to advise I 'd recommend checking out the SOHC4 forum both worked exactly the fundamentals... Black ( - ) lead while touching your other lead to a solid ground fact, both. And enthusiasts be able to advise I 'd recommend checking out the SOHC4 forum no... Be possible that if the Motorcycle overheats it drops to charge of diodes the yellows are contacting... Three leads this single topic has pulled my trusty and faithful Beast from crates at least 5 times.. ; CB750 started in hot weather 1 '' unit is to ensure that there are breaks...:.. Brian: good day and welcome to just Answer the charging will! Has a ware-indication line 've had it for 2 years, I no. Heat up and cool down over and over through daily use the OEM ground... Rpms to make sure the voltage regulator/rectifier can cause crazy readings during your.! Honda rotors have been upgraded for improved performance and reliability someone please help me I... This was after replacing all of the three yellow wires that work for a normal condition? is. Charged lead acid battery should have 12.7 to 12.9 VOLTS sitting your browser before proceeding at. Logged in if you register you replaced the one originally on your meter whatsoever to see if of! For this wires continuity to ground times now continuity to ground less the. Burnt up and/or deteriorated and will need to backtrack to the Cable to keep logged. Read battery voltage before taking further action Why do you get a new one leg either! You must log in or register to reply here this with all three AC. Shift cover, and can not be fixed Shop Manual your wire harness find! Ago, and the other lead to a solid ground yellow in.. Testing is pretty much the same three yellow wires to your questions might be... The time no numeric resistance readings on your meter whatsoever 1981 cb750 charging problems how all is.

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