I own a 2001 Raptor and I need some suggestions on jetting and airbox mods... I am running an HMF full exhaust with a trimmed up air box. I used the recommended jetting of 152 and 155. I have a 160 and 165 to put in, but I have heard that some riders are running bigger jets like 190 and 195. It runs really good, but if there's more power in there somewhere, I want it! Future mods are likely to be an overhaul with a stronger connecting rod, high comp piston, cam and springs, and maybe a Trinity stroker kit.... But for now since it still runs strong I just want max power with the current setup. Experienced help is appreciated! Thanks! Ride on!

 

I was in your neck of the woods Monday morning.

OK, back to jetting well I would think the jetting you have now is very good, I would suggest check your plug color. If its a very light color then go up to the 160, 165 mains. I am assuming you are still using the stock needles.

HMF is a very high flow exhaust system, I have one myself!