Author Topic: Clutch Pack Identification  (Read 674 times)

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Offline ShedBuildSTL

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Clutch Pack Identification
« on: November 07, 2019, 10:01:43 AM »
Hello all!

Newbie to the CB750 and the forum, not to wrenching.
As a winter project I recently bought a non-running 1972 CB750K (early in the model year - built 11/71, so I understand there may be some K1 bits on it).
De-rusted and RedKote'd the tank, rebuilt and bench-synced the carbs, changed the oil, set the timing - and she fired right up and sounds great! Hooray!!

Now to the issue at hand.
I noticed that the clutch appeared to be fully stuck, no matter what adjustments I made to the cable and clutch-release mechanism.
Pulled the clutch basket out and many drive plates were stuck to the friction plates - as expected, this bike has sat for ~5 years.
The friction plates in the clutch all measure within spec, and I am wondering if they are worth even trying to run or should be replaced. They seem to have much less passages for oil compared to stock, and I have been unable to identify them. Can anyone help ID these and/or give a suggestion on whether they should be usable?

Thanks in advance, happy to be here!

Offline PeWe

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Re: Clutch Pack Identification
« Reply #1 on: November 07, 2019, 10:56:15 AM »
New clutch needed

Cruzinimage K2 clutch for less money and work fine. They have cheap pistons too.
https://www.cruzinimage.net/2017/12/20/honda-cb750k1-cb750k2-cb750k3-cb750k4-cb750k5-seven-clutch-plate-set/
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 my name is nobody

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Re: Clutch Pack Identification
« Reply #2 on: November 07, 2019, 02:14:12 PM »
check your e mail...