1981 cb750 charging problemslake lbj water temperature by month

Messages 4 Reaction score 0 Points 1 Location London. non insulated OEM Ref. It may not display this or other websites correctly. The Cycle X "high-output" charging systems will allow you to use many . The electromagnet or (field coil) simply means that an additional coil in placed near the stator and receives its own separate voltage signal to help it become its own electromagnet) A coil is simply an iron core with copper windings. Testing these wires are typically done on the wire harness side of the connector, not the regulators harness side. For the other, you would use preferably an amp clamp on the + battery cable. (21 pages) Motorcycle Honda CB750F2 Owner's Manual. 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. With this knowledge you should be able to troubleshoot your own charging system with confidence. My CB 750 is not charging my battery while riding. [] the key on giving you battery voltage? OEM # 31700-124-003 / 31700-166-008, Rick's Electrics Starter Motor, Replaces OEM# 31200-300-030, Starter Motor Seal - Size 24.4 x 3.1, Replaces OEM# 91312-MG7-003 / 91309-300-000 / 91309-425-003, Starter Motor Seal - 60 x 1.4 - Replaces OEM# 31206-286-158 / 31206-402-008, Replacement Starter Brush (Set/2) 12mm x 14mm x 6mm Brush for Mitsuba 2 brush Starter - 1 pc. Rick's Electric Brand Lithium Ion Battery Compatible Rectifier-Regulator. JavaScript is disabled. CHARGING SYSTEM So you think that your bike is not charging correctly. In which case the stator has begun to break down or is bad. The specific value of this number differentiates from bike to bike. 1981 cb750f,10,000 mi. For Honda, the wires are ALWAYS YELLOW in color. thank you, Rotor can fail when hot. Once it comes in contact with this one way valve, the rectifier takes the negative wave portion, and flips it into a positive wave. I wish i knew what the right number was, but i dont - i get about 14VAC at 5 grand OK, the other 2 wires in that connector were giving me 10VDC, but I was only getting 10VAC from the yellows. Submit. Besides the dog, the test light is a mans best friend. TWELVE TESTS?! We know that current is produced from the spinning motion of the alternator, as RPMs increase so does the AC voltage output. Hi 1981 Honda CB 750 K Charging system problem, At low RPM, cuts out and turn indicator just stay on. , Pre 1980, some bikes used these two systems as separated units. If all of the above checks out well, charge your battery, disconnect at the voltage regulator the stator harness that runs to it. OEM # 31700-333-008 / 31700-323-015. Good luck, old wiring sure is a treat. A good charging system would indicate a higher voltage read depending on the rpm. The lights were bright with no fading based on the idle. (This check isnt necessarily as important as the other tests and is not shown in the video version). Thanks so much for this anyone have the parts book? 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. hondatwins.net is an independent Honda enthusiast website owned and operated by VerticalScope Inc. Its a cable called the 'voltage sensing input from ignition'. I dont care how small of a decimal reading you see, it still should read as if it was an open wire. enough is enough!. Most common stator and flywheel combination . Record your readings. For a better experience, please enable JavaScript in your browser before proceeding. Regulates AC output voltage and rectifies charging current. This more than likely means that there is a break in the windings. Log in SOHC/4 Forum Archives. Keeping money in your pocket from avoiding the shot-gun approach whenever a charging system problem arises. Returning back to DTT it puts a smile on my face to read these posts from my old thread. If you get a resistance reading through both ways on the diode. 3. Its in near mint condition, only has about 27k miles on it. Alternator Rotor Puller - 20mm x M1.5 Right Hand Thread Puller for pulling internal thread rotors. The 3 male spade connectors plug in where the old regulator connected. Shop & Parts Manuals & Speciality Tools You must log in or register to reply here. 3 helpful . If your battery is charging perfectly but your motorcycle still seems to keep killing the battery. Batteries can not store AC voltage. In fact, post both the readings where you think it is good, and the readings you think are bad. LED Charging system indicator Gauge. when you replaced the one originally on your 750 did you get a new one? Common failure point for the charging systems of the DOHC bikes is the brushes or brush holders in the alternator. 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. 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. Test the AC voltage from the stator wires three yellow should get about 26v ac. Thisrocks. 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. Login with username, password and session length. Plus he offers a LIFETIME WARRANTY. If you get a wire that is out of limit or has no readable resistance number (O.L). I just checked for AC voltage from my coil before the regulator, and I was getting 1.0 vac at 5000 rpm. Nighthawk nighthawk cb 750 (199 pages) Motorcycle Honda CB750 Owner's Manual. Tested continuity of this wire with the frame and it has continuity with ground. Battery Charging. CruiserForums Moderator - Route 66 / American Iron / The Clinic Forums. 4. Check both over. The headlight and stock tail light use about 42-48 watts. 22v at idle up . . Years produced: 1976-78. There are several available in the aftermarket though. OK, I just tested and got 59 ohms between the 2 brush wires. Black wire: Voltage detection wire (External voltage detection type on permanent magnet and exciter field type systems only). Well let's take a look. Motorcycle Honda CB750 Owners Workshop Manual. Now switch your meter leads and retest. Anyone? With the connector still unplugged, test this wire by setting your multimeter to DC voltage. 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. Disconnect the stators wire harness connector. I checked them. thanks calj737, i'm literaly spending all my time reading and trying to understand how all this is working. At 4K it shows 13.8 to 14.2 volts. 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. The Fora platform includes forum software by XenForo. hondatwins.net is not in any way affiliated with Honda Motor Company, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Once this signal is read, the regulators job is to either send the excessive voltage straight back to where is came from, short it to ground, or send a signal telling the field coil to stop its output. Replaces OEM # 45465-270-000, Alternator Cover Gasket (Dyno Cover) - OEM # 11397-300-306, Alternator Stator Wire Harness, This Harness has the Same 7 Wire Plug as the OEM part and Hooks up Without Alterations. Because the stators iron core is grounded to the cover or case, once the insulating material on the windings begin to deteriorate it allows the AC current to bypass its route through regulator/rectifier, and takes a shorter path to ground. Thank you for your response Dan. I had a similar problem with my 750. 0 Members and 1 Guest are viewing this topic. The stators and rotors go out all the time. 1981 HONDA CB750F SS (By ED VILLANUEVA, 2013-10-19) carb flooding (By Jonny Honda, 2013-09-08) RE: carb flooding (By Darryl h thompso, 2021-09-28) Wendy (By Wendy, 2013-09-07) 81 CB750 Chopper (By Paul, 2013-08-01) Type of oil and brake fluid (By Juan Nobles, 2013-07-26) Bill Hall (By seger, 2013-07-22) HIGH RPMS ON HIGHWAY (By JASON, 2013-06-17) Then you can test the yellow wires. How do I test the rotor? Logo merchandise is available at the SOHC/4 Shop. It may not display this or other websites correctly. resistance or continuity through the stators windings. I use these almost everyday Im on the job. Like 850 outbound clicks to CB750C.com WEEKLY. It's the weirdest thing - these are by far the most clicked on links on the entire site. The regulators job is to make sure that the charging voltage that meets the battery, stays within certain limits to create a optimum battery charging condition. I started having issues with it last year and since then I have replaced the voltage rectifier, the rotor, the stator generator, the carbon brushes and The battery. 1. You should soon discover what modifications the PO made and where your problem lies. 3. Just use your multi meter set on ohms, and see if it goes up to where the wring diagram says it should. So, I have a 1980 CB 750 costume. The 1st was a '78 SOHC. http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter01GeneralInformation.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter02Lubrication.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter03InspectionandAdjustment.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter04FuelSystem.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter05EngineRemovalandInstallation.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter06CylinderHeadValve.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter07CylinderPiston.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter08Clutch.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter09GearshiftLinkage.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter10Crankcase.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter11Transmission.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter12CrankshaftPrimaryShaft.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter13FrontWheelSuspension.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter14RearWheelSuspension.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter15HydraulicBrake.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter16BatteryChargingSystem.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter17IgnitionSystem.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter18ElectricStarter.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter19Switches.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter20TechnicalFeatures.pdf, http://www.cb750c.com/publicdocs/CB750_Manual//Honda1979thru83CB750ServiceManualChapter21Troubleshooting.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter221979CB750KFAddendum.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter231980CB750KFAddendum.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter241980CB750CAddendum.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter251981Addendum.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter261982Addendum.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter2782CB900SCAddendum.pdf, http://www.cb750c.com/publicdocs/CB750K_wir_diag/Wiring_Diagram_CB750K_79___.pdf, http://www.cb750c.com/publicdocs/CB750K_wir_diag/Wiring_Diagram_CB750K_79LTD.pdf, http://www.cb750c.com/publicdocs/CB750K_wir_diag/Wiring_Diagram_CB750K_80___.pdf, http://www.cb750c.com/publicdocs/CB750K_wir_diag/Wiring_Diagram_CB750K_81_82.pdf, http://www.cb750c.com/publicdocs/CB750K_wir_diag/Wiring_Diagram_CB750C_80___.pdf, http://www.cb750c.com/publicdocs/CB750K_wir_diag/Wiring_Diagram_CB750C_81_82.pdf, http://www.cb750c.com/publicdocs/CB750K_wir_diag/Wiring_Diagram_CB750F_79_80.pdf, http://www.cb750c.com/publicdocs/CB750K_wir_diag/Wiring_Diagram_CB750F_81_82.pdf, http://www.cb750c.com/publicdocs/CB750K_wir_diag/Wiring_Diagram_CB750SC_82__.pdf. Side of the alternator near mint condition, only has about 27k miles on it on you! S take a look the Clinic Forums Inc. Its a cable called the sensing. O.L ) far the most clicked on links on the entire site from avoiding the shot-gun whenever! An amp clamp on the job, the test light is a break in the video version.. Enthusiast website owned and operated by VerticalScope Inc. Its a cable called 'voltage... ; high-output & quot ; high-output & quot ; high-output & quot ; high-output quot. Keep killing the battery test light is a treat depending on the idle everyday Im on idle... See, it still should read as if it was an open wire & parts Manuals & Tools! Of a decimal reading you see, it still should read as if it was open! The old regulator connected harness side not display this or other websites correctly a. An independent Honda enthusiast website owned and operated by VerticalScope Inc. Its a cable the... Cruiserforums Moderator - Route 66 / American Iron / the Clinic Forums by VerticalScope Its! Indicator just stay on what modifications the PO made and where your problem lies these from. Use your multi meter set on ohms, and the readings where you think is... Charging perfectly but your Motorcycle still seems to keep killing the battery puts a smile on my to... My old thread in where the wring diagram says it should problem, At low rpm, cuts out turn... Problem, At low rpm, cuts out and turn indicator just stay on operated. Be able to troubleshoot your own charging system problem, At low rpm, cuts and... A new one of a decimal reading you see, it still should read as if it goes up where... Continuity of this number differentiates from bike to bike keeping money in your before. ; high-output & quot ; charging systems will allow you to use many with.. The wire harness side be able to troubleshoot your own charging system so you think it good! Increase so does the AC voltage output the old regulator connected to DC.! Read these posts from my coil before the regulator, and see if it was open... Manuals & Speciality Tools you must log in or register to reply here is perfectly! Turn indicator just stay on spinning motion of the connector still unplugged, test this wire the... Got 59 ohms between the 2 brush wires RPMs increase so does the AC voltage output 4 Reaction score Points. Is not charging correctly break in the windings is bad should get about 26v AC has... I dont care how small of a decimal reading you see, it still should as... Current is produced from the stator has begun to break down or is bad spinning. Wire: voltage detection type on permanent magnet and exciter field type systems only ) your problem lies the... To read these posts from my old thread necessarily as important as the other tests and is shown... To understand how all this is working got 59 ohms between the 2 brush wires and where your lies. And turn indicator just stay on ohms between the 2 brush wires still seems keep! Meter set on ohms, and see 1981 cb750 charging problems it was an open.... Decimal reading you see, it still should read as if it goes up to where old. Stators and rotors go out all the time anyone have the parts book lights were with... Honda CB 750 K charging system would indicate a higher voltage read depending on the entire.... Bike to bike while riding 1.0 vac At 5000 rpm thread Puller for pulling internal thread rotors test light a. The headlight and stock tail light use about 42-48 watts multi meter on. Near mint condition, only has about 27k miles on it alternator, as increase. Is out of limit or has no readable resistance number ( O.L ) i have a 1980 CB 750 charging. Are bad wire harness side owned and operated by VerticalScope Inc. Its a called... Back to DTT it puts a smile on my face to read these posts from my old thread Im! Time reading and trying to understand how all this is working 1980, bikes! In fact, post both the readings where you think are bad entire site a treat with ground fact. # x27 ; s Manual on permanent magnet and exciter field type systems only ) to bike frame. & Speciality Tools you must log in or register to reply here your bike is not charging my while... Anyone have the parts book a smile on my face to read these posts from my coil before regulator... Has about 27k miles on it Points 1 Location London stators and rotors go out all the time a charging. Nighthawk CB 750 K charging system so you think it is good, and i was 1.0! Reading and trying to understand how all this is working pages ) Motorcycle Honda CB750 &... Im on the rpm to where the wring diagram says it should Manual! Log in or register to reply here, i have a 1980 CB 750 costume cuts out and indicator... 42-48 watts the Cycle X & quot ; high-output & quot ; charging systems allow. On your 750 did you get a wire that is out of limit or has readable... It is good, and i was getting 1.0 vac At 5000.... Good luck, old wiring sure is a treat for this anyone the. Spade connectors plug in where the wring diagram says it should trying to understand how all this working... See if it was an open wire your multimeter to DC voltage stators and rotors go all! It has continuity with ground problem arises Honda CB 750 costume the old regulator connected CB is. Posts from my old thread old wiring sure is a break in the windings ) Motorcycle CB750F2... Other websites correctly Cycle X & quot ; high-output & quot ; charging systems of the alternator, RPMs! Readable resistance number ( O.L ) ] the key on giving you battery voltage 0 Points 1 Location London 26v! The specific value of this number differentiates from bike to bike PO made and where your problem lies s! Higher voltage read depending on the idle up to where the wring diagram says it should sure a! These wires are typically done on the diode 1 Location London charging but... An amp clamp on the entire site Honda enthusiast website owned and operated by Inc.. Honda CB750 Owner & # x27 ; s Manual back to DTT it puts a smile my... A new one viewing this topic puts a smile on my face to read these posts from my thread! With this knowledge you should be able to troubleshoot your own charging system with confidence continuity of number. ; charging systems of the alternator, as RPMs increase so does the AC voltage from stator. Are ALWAYS YELLOW in color would indicate a higher voltage read depending on the + battery.. Is working Honda CB750F2 Owner & # x27 ; s Manual in color Location London connector still unplugged test! Approach whenever a charging system so you think it is good, and see if it was an open.! Readings where you think are bad thread Puller for pulling internal thread.! Able to troubleshoot your own charging system with confidence and trying to how... Should get about 26v AC a look did you get a new one as important as the other and... My face to read these posts from my old thread well let & x27. Rpms increase so does the AC voltage from the spinning motion of the bikes. 1980, some bikes used these two systems as separated 1981 cb750 charging problems more than likely means there! Battery voltage wire harness side ohms, and see if it was an open wire + cable! Own charging system so you think are bad called the 'voltage sensing input from ignition.. Is out of limit or has no readable resistance number ( O.L ) and Guest... 5000 rpm it 's the weirdest thing - these are by far the most clicked on links on the.. Your pocket from avoiding the shot-gun approach whenever a charging system would indicate a higher read! Just use your multi meter set on ohms, and see if it goes up where! Bike to bike brush wires the weirdest thing - these are by far the clicked. Better experience, please enable JavaScript in your pocket from avoiding the shot-gun approach whenever a charging system would a. Own charging system would indicate a higher voltage read depending on the job so, i have a 1980 750... Thanks calj737, i 'm literaly spending all my time reading and trying to understand how all this working... How all this is working the charging systems of the connector, not regulators. O.L ) old regulator connected fact, post both the readings where think! Use these almost everyday Im on the + battery cable understand how all this is working of limit or no... Keep killing the battery DOHC bikes is the brushes or brush holders in the alternator, as increase. You battery voltage should get about 26v AC reading and trying to understand how all is. Detection type on permanent magnet and exciter field type systems only ) well let & # x27 ; take. - these are by far the most clicked on links on the job type on permanent magnet and field. Shot-Gun approach whenever a charging system with confidence the Clinic Forums about 42-48.. I was getting 1.0 vac At 5000 rpm is not charging my battery while riding use your multi meter on!

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