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What is the max cylinder pressure you can go on a 98 GP1200 and still use 93 octane. I found a real good deal with a brand new race head with 38 cc domes. My compression right now is about 120 across the boarl sO I am thinking it would raise me to about 160psi. I am using a RIVA CDI Mod1 for my timing curve (25 degrees at 5000 retard 3 degrees per 1000)
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