Twin clutch cush rubbers

rowdypat

rowdypat

Hero member
Location
Melbourne
Replacing triplex primary chain with one of Reds duplex. Thought I'd do clutch cush rubbers at same time (have about 1 or 2mm play). Still has original rivets in clutch basket. Have read green book recommendations regarding drilling out rivets and replacing with 6mm bolts or 7mm helicoils etc. May have to trim a little off cover webs for bolt head clearance. Any tricks, better ideas, etc before I get too involved.
Cheers,
Pat
 
Grind the heads off the rivets until you can remove the plate then grind a bit more off the protruding ends, this prevents the scraggy end of the rivet tearing up the hole in the post. Warm up the clutch basket and drift the old rivets out backwards, should then be able to tap M6 or M7 depending on what size rivet was fitted originaly. The posts are quite fragile so go steady.


    Keith.
 
Pat,

Do NOT fit washers of any kind under the fixing bolts.  Clearance is very tight under the twin primary cover, if you feel the need for added security, use a drop of Loctite.  Use hex head bolts, standard allen bolts will also foul the cover.  No need for web-trimming... :D

Depending on how well/precise you can drill a hole, it helps to reduce the rivet pressure on the alloy posts by boring out the rivets to 4.5mm, about 1/2 their length and then punching them out.  Do follow Keiths' advice re grinding.

piet
 
71Laverda750SF said:
Curious as to why you would not want to replace the rivets rather than using the hex bolts with or without the helicoils.

Clay
Click to expand...

Makes getting in there easier next time around.
Clutch cush drive rubbers need changing often.

Ciao
Paul
 
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