Author Topic: CB750 Starter Motor  (Read 575 times)

Offline Crock41

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CB750 Starter Motor
« on: October 26, 2018, 03:16:54 PM »
Tha starter motor on my CB750 K2 seems to struggle to turn the engine over.
I have replaced the battery.
Today I noticed that the starter and the earth cable are getting extremely hot when trying to crank the engine.
The bike turns over easy enough on the kick start
Is there a way of testing the starters motor

Offline Bryanj

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Re: CB750 Starter Motor
« Reply #1 on: October 26, 2018, 03:39:42 PM »
Probably best to remove it and strip/clean it as the bushes get tight when crudded up

Offline martin_uk

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Re: CB750 Starter Motor
« Reply #2 on: November 21, 2018, 09:18:56 PM »
It is not unusual for the earth cable to have a high resistance if connection to engine incorrect or paint is preventing full contact.

If you have jump leads try adding an extra lead from battery earth to engine to see if it makes a difference .

Also worth checking volt drop see https://www.autotechnician.org/starter-voltage-drop-test-explained-in-plain-english/
1977 CB750F1
1977 CB750f1 836
1978 CB750F1
1975 CB500K1

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