trouble661
01-18-2004, 08:03 AM
would i gain any more power if i ran without the spark arrestor end disk in my white bro e series slip on pipe on a 400ex?i know i will need to do some rejetting but just want to know if i should keep it on or take it off. also what is a good amount of disk to install for all riding conditions? i do both trail and wide open areas.