« previous next »
Pages: [1]   Go Down

Author Topic: 1975 cb750 charging issue  (Read 666 times)

0 Members and 1 Guest are viewing this topic.

Offline Aaronlee

  • Full Member
  • *
  • Posts: 12
1975 cb750 charging issue
« on: June 15, 2016, 08:22:09 PM »
Hi guys, I just bought the bike and the guy before me said it has a charging issue. Possibly stator.. After about 2 hours of riding lights start dimming and bike dies. Any ideas as to what's going on. Where should I start?
Logged

Offline CycleRanger

  • No comment about being an
  • Really Old Timer ...
  • *******
  • Posts: 5,801
  • Central Texas Shop Manual Advocate
Re: 1975 cb750 charging issue
« Reply #1 on: June 16, 2016, 05:17:46 AM »
Howdy! Welcome.

You should grab a copy of the shop manual here:
http://www.honda4fun.com/materiale-documentazione-tecnica/shop-manual

It will help you diagnose the problem. :)
Logged
Do you have a copy of the Honda Shop Manual or Parts List for your bike? Get one here:
https://www.honda4fun.com/materiale/documentazione-tecnica
CB750K5        '79 XL250s     CL350K3
CB750K3        '76 XS650      '76 CJ360T

Offline PeWe

  • Really Old Timer ...
  • *******
  • Posts: 16,445
  • Bike almost back to the 70's 2015
Re: 1975 cb750 charging issue
« Reply #2 on: June 16, 2016, 07:14:05 AM »
ignition coils relplaced? 3 ohm coils drain battery rather quick.
Search for other threads where TwoTired explain the charging system in detail and how to fault trace. Use google when search
Logged
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline flybox1

  • My wife thinks I'm a
  • Really Old Timer ...
  • *******
  • Posts: 14,289
Re: 1975 cb750 charging issue
« Reply #3 on: June 16, 2016, 07:18:03 AM »
Download the shop manual
Clean and treat EVERY connector on the bike.  Dont miss anything.
Follow this: http://www.hondachopper.com/garage/troubleshooting_charging_system/troubleshooting_charging_system.pdf
Report your findings.
Logged
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline riffman12

  • Hot Shot
  • ***
  • Posts: 388
Re: 1975 cb750 charging issue
« Reply #4 on: June 16, 2016, 09:08:48 AM »
I've been chasing down similar problems on my '76 F in this thread: http://forums.sohc4.net/index.php/topic,157858.0.html

If you read through there, there's some really good advice from members.
Logged
Pages: [1]   Go Up
« previous next »