I've been researching them, some companies sell big bore pistons, stroker kits, exhaust kits, carbs etc.....i've seen claims of 14 second quarter mile times and speeds of 100+mph....pretty crazy huh....i'm definitely wanting to get one

check out the bike of the month here

http://www.vtcycles.com/general.htm

 

im doubting 100mph, ive ridden one, and UNLESS you swap the motor, 100mph seems impossible.

yeah, there are bunch of shops, Daytona, Kitako, and some others sell bore-up kits.

 

my friend has 2 old honda hobbits. kinda like one speed bicycles that have motor kinda, pretty fun to goof off on

 

you can bore/stroke the motor to 125cc, and put different gears in it.....so even if you can't go 100mph....you can mod the ccrap out of them...disc brakes, upgraded supsension etc

 

i wouldnt doubt the 100 mph estimate. the elites are governed as it is so with a new carb, gears, big bore kit and a pipe i dont think that 100 would be too out of reach