I'm planning on doing this mod tomorrow morning. Just installed my yoshi slip on yesterday and it's making cracking/popping sound around 7k when the throttle is released from 9k. How would I know if the bike is too lean or rich after the shimming? Also, I don't know if I should remove the snorkel and shim at the same time or remove the snorkel after seeing how the shimming affects my bike. I'm planning on using two washers for each.
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