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Question about valve shims...

  • Thread starter Thread starter dead_mike
  • Start date Start date
I'm going to follow this thread, I will be lapping my valves soon and want to get as much info as I can!
 
I always measure both thickness and diameter. I started this after getting 29mm shims from the box marked 29.5mm at my local dealer.

I've never used 29mm shims, but you have to wonder if they would lead to a cam walk sound, or other forms of racket. I've been handed 29s from a dealer who doesn't bother to differentiate.

I once wondered what it was they fit, but whatever it is, I don't own one - or plan to. I now just buy new GS500 shims because on a twin there are only 4 shims anyway.
 
I went to a local dealer one time and after asking for some shims they handed me Kawasaki shims which are smaller. Told them I don't want them and the guy looked at me crooked and said they install them into customer bikes all the time.
 
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Are you doing this with the head off or on and properly torqued? If the head is off you are only getting it close as things will change with the compression load of the studs. Get it close, then do it again when it is all back together.
 
I've been handed 29s from a dealer who doesn't bother to differentiate.

I once wondered what it was they fit, but whatever it is, I don't own one - or plan to.
29.0mm shims fit the KZ bikes that I had and some Yamahas.

I have a modest selection of them, because I have had three KZs and one ZN bike.
I make sure they are kept nowhere near my 29.5mm GS shims.

.
 
29.0mm shims fit the KZ bikes that I had and some Yamahas.

I have a modest selection of them, because I have had three KZs and one ZN bike.
I make sure they are kept nowhere near my 29.5mm GS shims.

.


I should probably start another stash box. :oops: The KLR uses the same shims as the KZ.

 
Me? Yes, fully torqued with the engine near fully assembled. My issue was a shim that was marked with one measurement, but way off when checked.

Are you doing this with the head off or on and properly torqued? If the head is off you are only getting it close as things will change with the compression load of the studs. Get it close, then do it again when it is all back together.
 
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