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Author Topic: 1976 cb750k clutch reassembly problem. Please help.  (Read 216 times)

Offline RatBrat76er

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1976 cb750k clutch reassembly problem. Please help.
« on: Jul 10, 2018, 01:57:34 »
I'm putting a new clutch in my 1976 cb750k. I ordered all the parts from vintagecb750.com. 6 friction plates with small tabs. 1 friction plate with large tabs. 6 steel rings. 4 springs. 4 spring bolts. (Note: After removing the old components from the motor, I noticed that the new spings are shorter and made of thicker wire, but the overall diameter is the same.) I'm very certain that I put everything back together exactly as I took it out. I watched several videos before the operation, and assembled the new components as shown in the schematic in my shop manual. I torqued the lock nut to 33 ft lbs and the spring bolts to 6 ft lbs. After everything was back together,  I started the bike up to test/ adjust the clutch cable and the bike acted like the clutch won't let the transmission engage. I can shift into gear and nothing happens. After disassembling/ reassembling about a dozen times, trying different torque settings on the spring bolts and trying the old springs, I get the same result every time. The clutch just won't release. Torquing the spring bolts to 6 ft lbs feels like I'm bottoming the springs out and I can't pull in the clutch lever. Loosening them, I can pull the lever, but still, no go.
I know that's a lot to digest, but does anybody have any suggestions?

Offline irk miller

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Re: 1976 cb750k clutch reassembly problem. Please help.
« Reply #1 on: Jul 10, 2018, 19:31:30 »
76 uses longer springs.  The basket is deeper than the earlier baskets.  If the springs are short, it's probably because you have the earlier springs.  Also, binding is caused by the pressure plate not being seated properly to the clutch center or the basket being 180 out on assembly.

Offline VonYinzer

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Re: 1976 cb750k clutch reassembly problem. Please help.
« Reply #2 on: Jul 10, 2018, 19:37:38 »
Pgh76er, told ya someone smarter than me would help.
Like a river that don't know where it's flowin'
I took a wrong turn and just kept goin'

Offline RatBrat76er

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Re: 1976 cb750k clutch reassembly problem. Please help.
« Reply #3 on: Jul 11, 2018, 01:00:32 »
Thanks for the info. Something else was brought to my attention as a possibility. Is there a chance that there is a spacer of some sort behind the clutch disc assembly that could have fallen under the basket?