If you could make the best engine for racing a 50 out at the MX tracks, what would you do to it? I'm talking in terms of which bore kit, which carb, what gearing, etc. etc.. What do you think would eventually be the fastest possible set up?

 

88cc bore with a 20mm carb. 16 tooth front sproket, 36 rear sprocket. Also change your clutch springs, valve springs, and oil pump. Get a good free flowing exhaust, the ultima is good. Also the oil vent box is good too. Also a good air filter, Uni 2 stage filter.

 

That sounds sic. Any other ideas that could beat that?

 

i got a sik50s cam, 88cc cylinder and piston, and a super oil pump.

before that i already had a fmf pipe, k&n air filter and rev limiter

those are my engine mods, i also removed the choke from the stock carb and that made it breath better and i dropped the needle all the way.

if i were you i would get all that , but NOT GET THE FMF , the fmf is made for stock bore go with a big gun, BBR, Ultima, or two brothers, if your concerned about money dont get a pipe at all just remove the baffle and do all those other things you wont regret it. removing the baffle ALMOST gets as much performance as the fmf, well it does but i removed the packing in my fmf and i got a bit more performance so, either find a used fmf for cheap or save up and buy a good exhaust. do what i did. go with sik50s. get the high lift cam... wheelies in every gear :-D

l8r

 

Since I'm gonna be building it up over time, money isn't as big an issue I don't think. I kinda wanna get something bigger then everyone elses. Maybe a 115 or a 124 cc bore kit is in the future? Gimme a couple months to save up and I'll be hittin 65