what jetting do i need at sea level just taking lid off & sparky out. (wifes bike) is it worth it at all?????

 

Naa it's not really unless u have an aftermarket pipe and filter then I would do that. If you do already have those mods then do it. Go up probably 1 maybe 2 keihen jet sizes. Also what bike is it on? BTW- check ur pm's.
later,cory

 

i guess the bike would help sorry. 400ex

 

Any mods? Like airfilter,pipe and stuff and what kinds?

 

with those mods i would run a keihin 152 mainjet.

 

if you just wanted a little more HP on the stock setup might be worth it