sprocket size?

i have a 300ex with a fmf megamax exhaust, and kn air filter, and i would like some more top end speed. the stock sprocket sizes are 13/38. does anyone good sprocket sizea to gain more top end, without loosing alot of bottom end?:confused:

[Punk13rym]

try a 36tooth rear sprocket that would help a lot. and you could always switch back. also choose your sprocket size on what size tires you have also.

[honda250xrider]

i think u can go 14 in front with 34,35,36,37,38,39 in the rear just go and by all of them im sure u will find one u like