Vintage and Classic Hondas

alternator problems 1975 CB 750 F Super Sport

_‹ Previous Topic Next Topic _›

Classic

List

Threaded

5 messages Options

gimpy

alternator problems 1975 CB 750 F Super Sport

My 75 Honda CB 750 super sport which I just purchased a few weeks ago was not charging. I repaired one starter wire at connector plug, began charging for about 300 miles. Just started up and it's not charging again. So I removed alternator/stator cover to start testing. Is there supposed to be motor oil inside this cover area? Because about one cup of oil poured out. Started to rain and had to stop work, anyone know?

Re-run

Re: alternator problems 1975 CB 750 F Super Sport

Administrator

1 cup does seem like a lot. A little oil is fine, a tablespoon or something. Clean it out a bit and get into your wiring to make sure it is ok. Then run your checks.
What is the voltage at the battery at 2500 rpm? You are charging at that point and should be at least 13.5 volts.
If you ARE at that level, up to about 14 volts, your bike is charging and you might want to have your battery checked.

The ride IS the adventure. The destination is just to get gas!

gimpy

Re: alternator problems 1975 CB 750 F Super Sport

In reply to this post by gimpy

I cleaned out the stater area with carb cleaner, looked for any broken wires ect didn't see anything and reinstalled the cover and started the engine. Rechecked the voltage only 11.5 @ idle and 12.3 @ 3000 rpm its not charging. Will any of the charging parts interchange with a 74 750? I see the rectifier is different and stater plug looks different too.
I first bought a 1974 CB 750 with only 12,000 miles at a yard sale from the original owner with a froze motor from sitting in a barn in Canada. The original owner said they don't use titles in Canada, but promised to get me the registration. I said here in south fla we need titles or you can't get a licesne plate so I will need proper paper work.
Its been 8 weeks and no return call yet. I grew tired quickly and wanted to ride, so I bought the 75 SS.

TOOLS1

Re: alternator problems 1975 CB 750 F Super Sport

Administrator

The parts will interchange.
TOOLS

Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."

1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)

Re-run

Re: alternator problems 1975 CB 750 F Super Sport

Administrator

In reply to this post by gimpy

Almost everything will swap, that is one thing I love about these bikes!
Before you replace, check the gaps in the regulator. They may be off.

The ride IS the adventure. The destination is just to get gas!