Ooo, It's been bored and stroked with a new head, piston and arm to a 72cc (from a 49cc) so it's actually quite quick for its size since it happens that's a shared bottom end for a lot of old honda small engines (^__^)
I suppose it would make a neat work log for the "other mods" section =)
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How much was teh set if you know? (Happy B-day)