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Discussion Starter #1
Can you run shims with the jbs kit.i was told you can't because supposedly it will hit the cage but I've heard others doing it .I'd like to try the.5mm just to see the difference.

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Others have shimmed their JBS primary, but I don't remember this done on a 450.
What is your ratio now? and how does the belt ride out of the secondary now?
 

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Discussion Starter #3 (Edited)
I'm not sure what the ratio is exactly.i was talking to James and he said that he never tried the sheave with a shim on the 450 but said to try the .5 and see if it hits the cage so I check it all when I get the shim kit here and check the ratios and all

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