Hi there..I have a 06 Brute force. I wanted to change out my air filter and was wondering if i needed to rejet? I already had it jetted once before when i added the Big Gun exaust kit. Thanks.

 

Technically speaking anytime you get more air you want more fuel. For best power you want about 12.5 to 13 to 1 air to fuel ratio. Do you need to rejet? Most people get it close and call it good. Do you need to rejet? It just depends on how close you want to get it.