ok i own a 250ex, my friend have a kawasaki lakota and i want to be able to beat him, i already have a K and N air filter and i jetted it, anything else that doesn't involve getting an exaust? please reply thanks

 

you could always go with a big bore, but that would probably involve a new exhaust, a question, why are you running away from the idea of an exhaust?

 

the reason i dont want to go with an exhaust is because of the noise, there are many houses and sometimes call the police if they hear alot of noise. another reason is the money i was trying to keep the expenses down. thanks mark the spark

 

an exaust woul do the trick