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Does it matter which side of the valve shims are up?

  • Thread starter Thread starter simonp
  • Start date Start date
S

simonp

Guest
I took them all out and measured them, but I didn't think it mattered which side was up when I put them back in. I've done some searching but I can't seem to find the definitive answer.

Is there a top and bottom to the shims? Does it affect the operation of the engine if they're in upside down?

--Chris
 
Doesn't affect the operation of the engine, but recommended to insert with number side face down to minimize the number wearing off and making it unreadable.
 
By the numbers

By the numbers

Mr. simonp,

Mechanically, it makes no difference. But if you look you'll see that the numbers on the shims are only on one side. If you put this side up it will wear the numbers and make them hard to read. I try to put the numbers down, unless it's a used shim and the numbers are already worn. Used shims will have a large circle worn on one side, the "down" side", and a small circle worn on the "up" side. At least that's what I've found in my 850GT.

Thank you for your indulgence,

BassCliff
(See my valve story here.)
 
tomm said:
Doesn't affect the operation of the engine, but recommended to insert with number side face down to minimize the number wearing off and making it unreadable.
Click to expand...

+1 on that issue.
Phil.
 
PS, by the way, Kawasaki KZ1000 shims fit the GS motor too.
(some useless knowledge there for ya)
 
feelergaugephil said:
PS, by the way, Kawasaki KZ1000 shims fit the GS motor too.
(some useless knowledge there for ya)
Click to expand...

Actually, they are smaller and will not fit snug into the bucket. Not recommended since they can spit out.
 
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