i just ordered a two brothers slip'on for my 2008 450er. any suggestions on the jetting i should go with? the bike is bone stock and im thinking of pulling the air box lid and running a k&n with a precharger. im hoping i can get by with just changing the main jet so i don't have to take the bike apart.

 

well it probably wont idle right if u dont change the pilot jet, it will be a bitch to start but after it warms it will idle better. The best thing to jet with is if the exhaust or filter kit comes with suggestions those will be close, but only trial and error will give u the best running mixture.

 

Two Brothers recommends if you remove the airbox lid you should change out the main jet to a 172 main and install the needle clip in the sixth position. If your needle doesn't have any extra clips with stock you can purchase from dyno pretty cheap. actually pretty easy conversion with a little patience. check your plug after you ride to see if the new main is working properly. oh yeah and ride plus check out this link. http://www.twobros.com/Cust_Service/...14404xV_SO.pdf

 

thanks for the info guys! does anybody know what the main jet is on a stock 08 450er?

 

=D u will know when u take it out of ur carb.