I was thinking of purchasing a slip on exhaust for my 02 raptor. And i'm gunna leave on the stock filter and header. Do I have to rejett the carbs. just for the slip on? or will it run poorly?

 

Yes, you will have to rejet. Due to the increase flow of the exhaust you will need to get more fuel and, air in. Not sure of the jet sizes you will need but i'd recommend at least getting an aftermarket foam filter. I cleaned mine after almost every ride and, still found dirt, dust and, grime in my intakes when i rejetted for my new exhaust. The stock filter is crap!

 

The hole point of a slip in is to increase airflow, so you need more gas, to create more power, rejet [img]i/expressions/face-icon-small-smile.gif[/img]