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Old 12-24-2008, 06:03 AM
Bikeguy Joe Bikeguy Joe is offline
Godfather of Motorized Bicycles
Join Date: Jan 2008
Location: up north now
Posts: 11,531
Default Re: more top end speed after run in

I have had kits that ranged from 25 mph (40 kph) to over 35 mph (60 kph).

A lot depends on the engine, which intake it has, how well the ports are matched, what type of muffler, ect.

Most all of them can be made to run 50-60 kph with a little work.

Break-in does help, but I think a lot of it is due to "tweaking the engine and components" during the break-in period.
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