Quote:
Originally Posted by Hawkwind
just wondering if anyone has changed the bore of the hawk 250 ? If so what size and where to find piston and rings ?
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I suspect (but don't absolutly know) that this engine has been already bored out to quite close to the maximum. That said, there used to be a company, in California I believe, that used to manufacture stepped crankpins for small Honda engines. I do not recall the name of the company, or if they are still around. In theory, stepped crankpins are a poor idea, but I never heard of any engine problems from those modifications. This machine shop did the work in house, to make sure the crankpins were installed correctly. If I recall correctly, they bored the flywheels for an over sized crankpin which was machined for an off center big end bearing. The magic words "stroker crank" is how they were known among the motorcycle gear heads of the day.
