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Main Area => General GS500 Discussion => Topic started by: motoMechE on May 26, 2015, 05:27:22 PM

Title: Valve Shim Dilemma
Post by: motoMechE on May 26, 2015, 05:27:22 PM
Hey guys,

New to the forum (as a member), and looking for some advice while in the middle of my project doing a valve adjustment:

After searching the forum and wanted ads, it looks like the only aftermarket option to purchase is this K&L brand for replacement shims--which according to a few posts I've found isn't exactly known for reliability. Is the risk of getting a bad batch worth having my valves perfect? I'm only stepping down one size (0.05mm I believe) on all 4 valves, and so considering just skipping that and waiting for my next tear-down (winter  :laugh:). I have called shops everywhere and it seems like I may get lucky if I keep searching for heavily used OEM parts (there is also ebay), but not sure if I should trust worn shims necessarily either.

Thanks!
Title: Re: Valve Shim Dilemma
Post by: The Buddha on May 26, 2015, 05:30:11 PM
Old shims are better than new crap. Suzuki made awesome shims in the early 80's and put em in their GS 4 cyl bikes.
Cool.
Buddha.
Title: Re: Valve Shim Dilemma
Post by: motoMechE on May 26, 2015, 05:40:41 PM
Thanks! My instinct was, "If it's lasted in a running bike for 10-20 years, it's probably good!" but figured I'd let some more experienced owners weigh in before I do something I regret. Off to the WTB threads I go...
Title: Re: Valve Shim Dilemma
Post by: gsJack on May 26, 2015, 06:05:21 PM
My 97 GS went 80k miles and my 02 GS went 100k miles with no intake valve shim changes.  Exhaust valves required many shim changes until I went to wider than Suzuki specs and they held almost as good as the intakes.  Measured every shim I took out and never found a worn one.  I've only used oem shims  purchased from dealer over 12 years ago.

http://img.photobucket.com/albums/v443/jcp8832/GSvalvelogs_zps55f27f5e.jpg
Title: Re: Valve Shim Dilemma
Post by: motoMechE on May 27, 2015, 06:40:31 AM
Thanks, Jack! Your logs have helped me out on more than one occasion since starting my rebuild--I'll definitely be more confident about replacing them with the OEMs. Those K&Ls scare the hell out of me... would hate to hear a pop followed by a bunch of crunching in my top end after all this work.
Title: Re: Valve Shim Dilemma
Post by: kapiteinkoek on May 27, 2015, 10:25:32 AM
May I ask what the deal with shims and OEM parts is?
I always get them from my local Suzuki dealer, they have new ones in stock, often also used ones (-50% the price, and they are never worn always to spec) and if they dont they simply order them for me.
Title: Re: Valve Shim Dilemma
Post by: motoMechE on May 27, 2015, 12:29:03 PM
So far they have been out of stock in the few shops in my area... back order til July. Seems to be a common supplier among them is out from what little they have told me. Looks like I can manage to scrounge up enough used ones though...