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If these 103/104/105 cylinders are prone to warping, have them cryoed to stabilize the metal. I think it would cure that problem. Then use Olivers machined ridge to help them seal at the head. Knowing what I know now, I would have done that instead of 94mm cylinders on my engine.... then I would have to spend a bunch more $$$ on bigger valves/seats and better cam, bigger carbs.... Naw, my little 1971cc will make enough power for now and much less cost. The PCs would be the cheapest part of the upgrade!
ken
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