Thread: Top Speed
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Old 09-22-2011, 09:05 AM
Scootmeister Scootmeister is offline
Motorized Bicycle Elite Member
Join Date: Mar 2011
Location: North Carolina
Posts: 243
Default Re: Top Speed

Hey Mapbike. I have a Chinagirl and was wondering how she's rated as far as RPMs. Does some brands rev higher? Recently I rebuilt mine and was surprized to find that it only has two piston rings instead of three. Why do they vibrate so at high RPMs? My Homelite bike is smooth at 7K. Must be a balance issue with the crank. Anyway, I was thinking about your comment to Atombomb and don't see how one of these engines could turn 10K when my Honda Nighthawk with 4 big Mikunis doesn't. Anyway, half of the fun of building these bikes is learning what makes them work best. I'm on a new project and I'm trying to decide whether to go with my Chinagirl or my Grubee Whingding 4-stroke.
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