S4RS Clutch 101

[Speeddog]

I was concerned about that when I saw it on my S4's pressure plate.

The OEM ones are all that way, I've not seen one break.

Don't worry about it.

[roggie]

I was concerned about that when I saw it on my S4's pressure plate.

The OEM ones are all that way, I've not seen one break.

Don't worry about it.

Ok cool, good to know. Thanks!

[d3vi@nt]

Should I consider replacing the pressure plate? and if so, should I also change out the push rod seal and bearing in the pressure plate?

According to LT Snyder, if the wear holes are > 25% of the surface area of any retainer flange, replace the plate.

FWIW, I bought a pressure plate from HSB for about $90 with the bearing included/installed.

[roggie]

According to LT Snyder, if the wear holes are > 25% of the surface area of any retainer flange, replace the plate.

FWIW, I bought a pressure plate from HSB for about $90 with the bearing included/installed.

Ok great, also good to know. Thanks!

[roggie]

Take a scotchbrite 'cookie' on an angle grinder and deglaze the steel plates. If you have an extra curved steel, or can get one, add it to the pack in the reverse direction of the one that's in there. The curved one has the punch mark on it.

The groaning and grabbiness will be gone. The clutch won't be any quieter however.

ok, take 2. I deglazed most of the steel plates this evening, I still have a few to finish up tomorrow. I picked up a scotch brite type wheel for my Dremel. it took a while but i think I am on the right track.

I also think I located the curved plate, as long as the punch mark you mentioned is basically a small pin hole on a tooth of the plate? i flipped its direction in the stack.

again here is a typical plate before:

after the deglaze:


let me know if anything seems off. I'll be finishing up tomorrow evening after work and hopefully taking it out for a test ride. I'll report back then.

[koko64]

Looks pretty good.

[roggie]

ok finally got the clutch back together this evening and took the bike out on a quick ride.  Wow. much much better. I won't lie and say its like a totally new clutch but it feels much smoother and no groaning!

I'm guessing the additional extra coned plate in the reverse direction would have helped and I will probably still try to find one. I also wonder if I should have scuffed the friction pads slightly in case they were also glazed. But I'm very happy with the results. Hopefully this will buy me the rest of the season here and then some.

thanks for all of your help. this is by far the best forum I have been been a part of!

Matt

[ducpainter]

I don't believe you'd accomplish anything by scuffing the friction discs, other than shortening their useful life.