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Old 10-03-2012, 08:36 PM   #1
zeegman OP
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950 Clutch Check issue

Hi All,

pulled the clutch disks to check for wear and they were all ok.
Also checked the outer hub springs for length and they were fine.

Put the clutch disks back on the hub including the spring washer open facing out, and put the first clutch disk in with the larger diameter, and put the two different lining disks on the ends, and having the sharp edges of the steel only disk in the same direction.

Also made sure the arrows on pressure cap and inner clutch hub lined up.

When I tried tightening the pressure cap spring bolts the hub would spin - with some friction - but was a pain in the ass to tighten up all the way.

Even with the bike in gear and the bolts tightened up the cap can still be rotated with finger pressure.

Is this normal - and will it tighten up when the engine starts running or should I pull it out and redo?

Helpful comments are welcome.

Thanks,

Mike Z
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Old 10-03-2012, 11:26 PM   #2
TheMuffinMan
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That's normal, or was in my engine. You can always have a friend compress the rear brake when the bike's in 6th to tighten those down.


As long as the main clutch hub nut is at 130 NM with blue loctite and the pressure plate bolts are at 10 NM in a cross-wise pattern you'll be good.
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Old 10-03-2012, 11:26 PM   #3
gefr
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Is the pushrod properly seated?

The pushrod should seat properly in the presure plate.
The large center nut should also be tight.
Finally the most important: all clutch rings should be in, none missing, 11 fiber and 10 steel?
Can't think of anything else.
Cheers and keep us posted.
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Old 10-04-2012, 12:21 AM   #4
zeegman OP
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Clutch Check

Rechecked all the clutch disks - they are all there in the right quanitiies in the right places.

I watched the pushrod and the pressure cap move in and out when I pulled the clutch hand lever with the clutch cover off and everything bolted up - looks good.
I guess with the lack of oil (drained it out before checking clutch in the first place) maybe the clutch is not grabbing as much as it would normally.

We will see tomorrow when I add oil and fire up the engine.

thanks All

MZ
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Old 10-04-2012, 02:20 AM   #5
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Old 10-05-2012, 11:58 AM   #6
zeegman OP
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clucth check update

So bolted everything up and fired up the motor - it was running nice and smooth.
It was in neutral and everything was good.
Put it in gear and let go the clutch lever and the gears are not engaging so it seems it is effectively stuck in neutral.
Tried several times putting in and out of gear with no change.
The other wierd thing is the pull on the clutch lever is a very stiff feeling - like the front brake lever. There is a constant stiffness to it and no "give" when you just get past the friction point.
I have an evolution clutch secondary and I have had issues in the past when I removed the secondary from the bike I had to re-bleed to get the clutch functioning normally again.
Not sure why.
I will try this and see what happens.
If this does not help there wonder if there is some issue how the gearing meshes up when I put the disks and pressure cap back in?
thanks
Mike Z
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Old 10-05-2012, 12:03 PM   #7
TheMuffinMan
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Did you engage the clutch when the pressure plate was off?

And I've seen (and had) issues with evo slaves. I got rid of mine, went back to the new updated OEM one and haven't had an issue.
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Old 10-05-2012, 01:17 PM   #8
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Could it be troubles with your gear selection mechanism?

Maybe there is something wrong, further from your cluch? Maybe you should start lookin at the selection mechanisms.
Cheers.
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Old 10-05-2012, 02:28 PM   #9
zeegman OP
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Clutch check cont.

Quote:
Originally Posted by TheMuffinMan View Post
Did you engage the clutch when the pressure plate was off?

And I've seen (and had) issues with evo slaves. I got rid of mine, went back to the new updated OEM one and haven't had an issue.
Did not engage the clutch when the pressure plate was off.

For the most part the evo slave has worked fine, but like I say sometimes when I have unbolted it it seems to get stuck and then I need to fiddle with it to get it unstuck and then it is fine. Maybe when you unbolt it the slave cylinder opens up a bit, since there is no more back pressure from the pressure plate, and then fluid is drawn from the master cylinder, and since the master volume is so tiny it pulls the fluid and air bubbles into the cable - and hence the need to bleed again - just a theory - maybe getting CJs master fluid volume increaser and cooler might help here?

What issues did you have with the evo unit?

Thanks,

Mike Z
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Old 10-05-2012, 10:14 PM   #10
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Quote:
Originally Posted by zeegman View Post
...
Put it in gear and let go the clutch lever and the gears are not engaging so it seems it is effectively stuck in neutral.
Tried several times putting in and out of gear with no change.
The other wierd thing is the pull on the clutch lever is a very stiff feeling - like the front brake lever. There is a constant stiffness to it and no "give" when you just get past the friction point.
Had a similar strange experience many years ago...

Took the clutch apart to check a few things and had the same problems when I put it back together. Took it apart again, and noticed that the throwout bearing was not fully seated in the pressure plate. Carefully tapped it all the way in, re-assemble, and all was well.

Engine was hot when I opened it up. Guessing it was hot enough for the bearing to drop a little when I set the pressure plate down (expansion). Things had cooled off and tightened up by the time I put it back together. Felt like always in neutral because cap was always pushed out. Stiff lever because springs were already partly compressed.

Just a thought, something to check

-M
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Old 10-07-2012, 10:32 PM   #11
zeegman OP
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Fixed Clutch

Thanks for the ideas.


It ended up I just bled the clutch slave a bit and all is working now.
It needed it anyways as the fluid was starting to turn very dark.

Thanks All.

Mike Z

Quote:
Originally Posted by rider914 View Post
Had a similar strange experience many years ago...

Took the clutch apart to check a few things and had the same problems when I put it back together. Took it apart again, and noticed that the throwout bearing was not fully seated in the pressure plate. Carefully tapped it all the way in, re-assemble, and all was well.

Engine was hot when I opened it up. Guessing it was hot enough for the bearing to drop a little when I set the pressure plate down (expansion). Things had cooled off and tightened up by the time I put it back together. Felt like always in neutral because cap was always pushed out. Stiff lever because springs were already partly compressed.

Just a thought, something to check

-M
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