Author Topic: CB750 Clutch replacement questions  (Read 2430 times)

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Offline dhonda

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CB750 Clutch replacement questions
« on: June 14, 2010, 08:12:25 AM »
The other day I got to take a ride on a buddy's bike and noticed that their clutch seemed to engauge way before mine.  His friction zone started when the clutch was about half way out while mine doesn't start untill nearly 3/4 of the way out.

The clutch only has about 9k miles on it but i think it's original... Should I get a new clutch or just adjust the cable? If I do need a new clutch, what do I need to buy for a 76 (how many and what type of clutch/ friction plates)?

Offline madmtnmotors

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Re: CB750 Clutch replacement questions
« Reply #1 on: June 14, 2010, 09:26:50 AM »
There are three adjustments to make between the clutch and the cable. There is an adjustment to the clutch hub itself (beneath the tin outer cover), there is a cable sleeve adjustment where the cable sleeve enters the clutch housing, and then there is the final adjustment at the lever. Some manuals describe these adjustments better than others so you might try more than one source of reference. There are also numerous posts on this forum for clutch adjusments, and the same holds true for these (some are better/more descriptive than others). The adjusments are fairly simple, although not necessarily straightforward. Once you understand what these three adjustments do, you will soon forget what the mystery was about.

The first adjustment dials in your clutch plate spacing for disengagement. Too tight will slip/not fully engage, too loose might not fully disengage/hard grinding shifts (not to be confused with the first gear "clunk" when shifting from neutral to 1st gear, mine has done that for the 40,000 miles that I've owned it)

The second adjustment dials in your outer cable sleeve in relationship to the cable itself (to permit take-up for cable stretch)

The third adjusment at the lever permits fine tuning your friction point and allows for adjustment as the cable stretches (not too much or you would want to go back to the second adjustment) and as the friction plates wear (but not too much or you would want to go back to the first adjustment).

I did not replace my friction plates until about 50,000 miles, leaving the original steel plates in place.
TAMTF...


Wilbur



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