Clutch problems - tried everything (I know of)

Jlovvorn · Post by **Jlovvorn** » Wed Jan 11, 2012 9:49 pm

Hi,

I am new to the forum and restoring a 64 CB77.

I have it running, but the clutch is a persistent problem.

Partial operation, but still enough drag to make the bike stall in gear with the brake on at a stand still.

Tried all the riding tricks in the forum to break it loose, and then opened it up and cleaned and reassembled the plates.

Adjusted the clutch according to the forum instruction, and still only have partial operation.

The bike will almost keep running in gear with clutch pulled, but the operation of the lever is still a little tight, and the engine bogs down hard in gear with clutch depressed.

The little ball bearing is present (opened right side to confirm), and nothing looks bent.

I even have a second clutch pack I bought off Ebay, and have confirmed I assembled my clutch the same as the Ebay clutch.

The total travel of the plates with the lever pulled is less than a half inch. How far should it move? I can see the plates separate, but its not by much.

Any ideas? I am totally stumped, and its keeping my new baby off the road.

Snakeoil · Post by **Snakeoil** » Wed Jan 11, 2012 10:03 pm

My guess would be one of two things.

You do not have the operating arm of the release mechanism in the correct position and hence you are not getting the full intended rotation of the release. Not operating in the correct position will also increase the effort.

OR

You have severly warped plates.

regards,
Rob

Jlovvorn · Post by **Jlovvorn** » Wed Jan 11, 2012 10:12 pm

As soon as I find out where the operating arm is, I will check it out!

The plates are flat.

Thanks so much for the help.

Jlovvorn · Post by **Jlovvorn** » Wed Jan 11, 2012 10:43 pm

Just found this. Will try next:

Snakeoil
h305 Guru

Joined: 04 Aug 2010
Posts: 743
Location: Upstate NY

PostPosted: Fri Feb 25, 2011 6:26 pm Post subject:

Reply with quote

The arm on the clutch release mechanism should be below 90 degrees to horizontal so you actually pull it thru 90 to slightly past it. If the cable is too short, the arm will be much closer to vertical. This does two things. First, it greatly reduces the mechanical advantage and second sets you up to run out of travel in that you will be pulling straight up on the arm with the arm at 12 o'clock. You are basically trying to stretch it.

Pull off the side cover and have a look at the arm. That will tell you if the cable is too short or not.

regards,
Rob

davomoto · Post by **davomoto** » Thu Jan 12, 2012 10:03 am

I had a similar situation, and it turned out that someone had installed the wrong pushrod. It was just a bit shorter than the stock rod, but caused me a good bit of grief! Measure the rod length next time you have it apart.

Davo

Jlovvorn · Post by **Jlovvorn** » Thu Jan 12, 2012 10:22 am

Thanks.

The PO did a bit of a half-arse rattle can resto on the bike, and the cable is brand new. I am betting its too short or not set up right. But will check the rod too.

Anyone know the proper length for the clutch cable and push rod?

I will measure tonight.

LOUD MOUSE · Post by **LOUD MOUSE** » Thu Jan 12, 2012 10:38 am

A quick and easy thing to look at.
Are the adjusters on each end of the cable threaded all the way into the parts?
If not, turn them in and then adjust the adjuster to take up the slack.
Any problems let us know. .....lm

Jlovvorn wrote:Thanks.

The PO did a bit of a half-arse rattle can resto on the bike, and the cable is brand new. I am betting its too short or not set up right. But will check the rod too.

Anyone know the proper length for the clutch cable and push rod?

I will measure tonight.

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Clutch problems - tried everything (I know of)

Clutch problems - tried everything (I know of)