How do I determine the cylinder gasket thickness I need on my ROK GP? Looks like there are 3 or 4 options to choose from.
It’s determined my checking the exhaust port height and squish clearance between the piston and head. At the very least you’ll want to check the squish clearance and compare it to the manual specs.
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I Think Al Nunley said somewhere that compression (squish) is king… followed by exhaust port… which you can tune with its length…
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