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Stuck Valve Shim GS850G

  • Thread starter Thread starter CCMcC
  • Start date Start date
C

CCMcC

Guest
I am checking the valve clearance on my 82 GS850G. I removed (and reinstalled) the shims to check their size. One of the shims is now apparently stuck as I can't get it loose with a small screw driver. Any advice anyone can offer would be welcome. Thanks.
 
Hi CCMcC, might seem like a daft question but I take it you have the bucket positioned so you can use the notch in the top edge to get the screwdriver so you can prise out the shim ?. I guess if you`ve already removed & replaced the shims you will have but its the obvious question to ask first. If the notch is accessible, could be the blade of the screwdriver is to thick, have you tried a penknife blade ?. Another option, but a last resort would be to get the smallest blade screwdriver you have, get the tip at the joint between bucket & shim & try gently tapping the end of the handle with a light hammer. Can`t see how else you can get the shim out, but maybe someone else here has some other idea. Good luck anyway.
 
Thanks for the reply

Thanks for the reply

That's a good question. The notch was turned out and I tried to pry it from there (even using a small eyeglasses screwdriver and gentle tapping with a hammer as you suggest). I wonder if I inadvertently got the shim in slightly crooked when I reinstalled it. I have not started the bike yet, but thought running the engine might might straightened it out...or not.

Caleb
 
That happened to me once but i had the cams out so I pulled out the whole bucket and tapped it with a hammer.
 
Maybe use a length of 1/2" (or so) wooden dowel as a drift to tap downward on the shim every 45 degrees or so around its circumference. That, or just rotate the engine two revolutions to make sure it compresses its valve at least once. I'd think that should seat the shim if it's cocked at all.

Also try prying upward at two points, 180 degrees apart, with good sharp screwdrivers.

I've had them put up a good fight, but all the shims I've fought were 'stuck' by oil & vacuum...
 
Closing the loop

Closing the loop

As it turned out, the shim wasn't stuck. It was held in place by motor oil. I used the point of a pen knife to gently pry it out.:)
 
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