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Old 02-03-2012, 09:47 PM
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biknut biknut is offline
Motorized Bicycle Elite Member
Join Date: Sep 2010
Location: Dallas
Posts: 6,280
Default Re: Getting all 3 Horse Power out of your GT-5 Sky? (tear down)

Good job Chris. I think balancing your crank, and cutting your piston will be what make your biggest improvements so far. The picture you showed of your intake port before cutting the piston, looks about the same as mine. I think you'll get a really big improvement now, after cutting your piston, from an expansion chamber.

Originally Posted by recon chris View Post
Question, what size rear sprocket are you using?
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