GT 250 valve shim size?

[Jim]

Are the GT 250 valve shims 7.48 mm  diameter? Are they common to Suzuki or any other big manufacturer? I would like to have a plan before my valve clearance checks. Thanks folks.

[Simon]

They certainly are.

[Jim]

Thank you Simon. Are the Hot Cams or Pro X shim kits any good?

[♠️ M77]

JMP Shims are better.  Supposed to be made in Japan too.  Go OEM Suzuki or OEM Hyosung if you can (Hyosung uses Suzuki’s shims anyway)

I have not tried HotCams or ProX to comment on their wear rate and such.

[Jim]

JMP shims look rare over here. Besides OEM, PRO X  seems to be slightly preferred over the Hot Cams. Still gathering info. Thanks Marcel.

[Jim]

I went with these Taiwanese made shims. I won’t check valves for a couple more weeks though.

[Hyo71]

I was going to ask the same question as I need to check mine. I was hoping they were 10mm as I already have a good range of those.

[Author]

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