4 replies to this topic

[Neo]

Hi All,

If you have every removed the Clutch Basket from the Primary Drive Clutch Pinion you know there 8 things called SILENT BLOCKs (M358) that I think need changing on my 06, 125 Sherco.

First question....How do I check these SILENT BLOCKs are worn before separating the two parts?...I have +/- 1mm of (clock/anti-clock) play.

Secondly What's the best way to get those rivets off and how do I fit the new rivets?...they look more like screw-in studs that have been cut-off to me.


Best of balance.

Neo

[HAM2]

''Leave it..it's not worth it'' :)Mine look like the rivets were peened over.If you haven't suffered from a clunky drive take-up, dinna bother....
You're as bad as me---looking for work to do whilst you've got the engine apart!!
I thought it was only me who fannied on like that

[copemech]

Neo, on Apr 1 2009, 07:08 AM, said:

Hi All,

If you have every removed the Clutch Basket from the Primary Drive Clutch Pinion you know there 8 things called SILENT BLOCKs (M358) that I think need changing on my 06, 125 Sherco.

First question....How do I check these SILENT BLOCKs are worn before separating the two parts?...I have +/- 1mm of (clock/anti-clock) play.

Secondly What's the best way to get those rivets off and how do I fit the new rivets?...they look more like screw-in studs that have been cut-off to me.


Best of balance.

Neo

That movement sounds very normal to me, as there are just pieces of rubber in there to absorb impact loads. Large movement and clunking would be an indication that the rubbers were a goner!

[Neo]

Hi Gents,

More recently the clutch on our 125 has been slipping....But as everything looked good I couldn't figure out why.

So with nothing else to go on I decided to do the Silent Blocks and rivets. And on the recommendation of a local motor bike shop I took the clutch basket and Clutch pinion to the a local car brake shoe relining place, because the motor bike shop told me they have the best machine to press down the new rivets....They made a smashing job of this and the pinon is very tight on the basket now....no play at all.

But to to my amazement, when I put the whole thing back together again today the clutch was working and gripping fine and the clutch feels lighter too.....go figure that???


Best of balance.
Neo

[copemech]

Neo, on Oct 20 2009, 09:26 AM, said:

Hi Gents,

More recently the clutch on our 125 has been slipping....But as everything looked good I couldn't figure out why.

So with nothing else to go on I decided to do the Silent Blocks and rivets. And on the recommendation of a local motor bike shop I took the clutch basket and Clutch pinion to the a local car brake shoe relining place, because the motor bike shop told me they have the best machine to press down the new rivets....They made a smashing job of this and the pinon is very tight on the basket now....no play at all.

But to to my amazement, when I put the whole thing back together again today the clutch was working and gripping fine and the clutch feels lighter too.....go figure that???


Best of balance.
Neo

I am not totally sure about your findings, and have never heard of this.

There is, however, a practical theory in clutch technology called "microshear"!

This theory is usually put into practice by someone who might "lug" a diesel motor. Thusly the powerful forces of each powerstroke of the motor can actually override the clutches clamping action causing much friction slippage and distress to the plates that will destroy them.

Apply all that to a rubber damping unit that is capable of storing and releasing energy, along with a motor with some heavy flywheel action and run allthat through your computer model simulator with the frictional properties of your oil calculated in? Let us know the results!