Originally posted by bwamos
(Max RPM) * (1/ primary reduction) * (1/ 5th gear ratio) * (front sprocket/rear sprocket) * (tire circumference in inches) * (60 minutes/1hour) * (1ft/12in) * (1mile/5280ft) = top speed limited by max rpms.

Using completely fictional numbers for rpm & primary/5th gear ratios. (I don't have rev limit or trans mission ratios in front of me)

(7600rpm) * (1/ 3.00) * (1/ 1.00) * (13/38) * (22*3.14) * (60min/1hr) * (1ft/12in) * (1mile/5280ft) = 56.69mph

Above is bogus as those aren't correct numbers. It's just how I would calculate theoretical top speed.
alright I'm following so far...after reading it 20 or 30 times, the only thing I'm lost on is the primary reduction. What's that? Also which numbers aren't the correct ones. Sorry for bothering you with these questions...just curios