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Grinding valve shims

  • Thread starter Thread starter Nicholk
  • Start date Start date
N

Nicholk

Guest
Guys, I have amassed almost 30 shims from various sources. The problem is that they are nearly all 2.7-2.85 sizes. Has anyone ever ground these down?
I have a friend who works for a firm who can do it for free but I'm wondering if anyone has tried it. If so, how did they turn out and did it affect the hardening.
I'd be looking for some to go down to a range from 2.4-2.65. I'm guessing it won't be a good idea but I thought I'd ask just in case.
We don't have a shim swap scheme in UK as yet but it is being talked about.

Cheers.
 
get mine done all the time, you can easily take a 2.80 down to 2.40 without a problem with the case hardening. its better to grind it both sides so it ends up dead flat and you dont take to much off one face.
 
I understand that the hardening is all the way through, so that is not a problem.

if you only grind one side, do yourself (and the next guy) a favor and grind the side that has the number printed on it.

.
 
Nicholk, we have a member in Colorado who bought a surface grinder just to grind down shims, it's the GS Shim Club

So, yeah,itworks
 
I recently bought some GS500 shims, new, from Suzuki. I don't have them in hand anymore, and didn't spend a lot of time admiring them as I wanted to go riding, but they looked different from the old original style. Less chamfer on the edges, and appear to be made of powdered metal. They were also cheap, relatively, at about $10. I don't know how these would surface grind, but I don't see why not.

They also eliminated my cam walk?. so maybe part of that is having slightly non parallel faces or cupping wear. Dunno, but I don't find the cost exorbitant, especially if you're running a twin, and by now a lot of the shim fleet is getting rather 'experienced'. I guess the GS500 was the last motor to use this form of shim. ??
 
OK, thanks guys, I'll pass them off to my friend Thursday......but he has to wait for the boss to go out to do a freebie..!!
Rgds to all
Keith
 
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