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Old 05-14-2015, 11:37 PM
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Gbrebes Gbrebes is offline
Motorized Bicycle Elite Member
Join Date: Jul 2010
Location: Los angeles
Posts: 524
Default Re: theoretical top speed?

It depends on top rpm. I tried to answer that in posts #4 & #5. If you can get the motor up to 6,000rpm, then you would get 58mph, but real world I would expect 5 or more mph less with wind resistance. If you could get the Briggs to spin at 7,000, you could achieve 67mph, but I would minus out at least 5-10mph for wind resistance. Also to get your Briggs up to 7,000rpm would likely take a performance cam, billet rod, and stiffer valve springs.

Good luck,

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