Jetting Help

[07Special350]

I'm about to purchase a Pro Design ProFlow Foam Filter Kit for my 2007 Raptor 350. I ride at about 5m (13ft) I run stock exhaust with a Phoenix performance insert. I may want to do an exhaust in the future. So how does 147.5 Main and 25 Pilot sound? Would I have to go to 150 for the exhaust?

 

[DeadLastRacing]

Another jetting question......imagine that.

 

[beastlywarrior228]

I'm about to purchase a Pro Design ProFlow Foam Filter Kit for my 2007 Raptor 350. I ride at about 5m (13ft) I run stock exhaust with a Phoenix performance insert. I may want to do an exhaust in the future. So how does 147.5 Main and 25 Pilot sound? Would I have to go to 150 for the exhaust?

Yep

 

['00 WO-YA!]

None of us can tell you exactly what you'll need man...we can get ya in the ballpark but you'll just have to test & tune. Typically, we see 1-2 sizes up on both the pilot & main. The best you can do is get yourself the 2 sizes up on the pilot & the 3 sizes up on the main. That should have you covered...typically.

 

[07Special350]

Thanks for the input. I'm gonna order a 150 main and 25 pilot, which will hopefully be good, if I need to richen up I could always put the lid on.

 

['00 WO-YA!]

Are you talking temporarily put the lid on until you can get a bigger jet? The lid sucks man, actually, lack thereof, they're a major restriction.

 

[07Special350]

I was talking about just leaving the lid on and running the same jets. I think 150 will be fine because I ride at nearly sea level and with my stock exhaust.

 

['00 WO-YA!]

Up to you guy but the lid is a major power robber.

 

[07Special350]

Yeah, I wanna run lid off, that's why I went with the 150 rather than the 147.5 Thanks for all the help!

 

[miami1]

i would leave the pilot alone in your case

 

[07Special350]

Why are you thinking that?

 

[miami1]

Why are you thinking that?

if your not changing the exhaust your not really getting a whole lot more air through the engine. when i first got my raptor i pulled the spark arrestor and put a dyno jet kit in it which uses a different needle & spring and main jets and it was never lean on the pilot untill i installed the k&n clamp on filter. the exhast is well worth the $, the stock pipe is like trying to exhale thorugh a straw!

 

[07Special350]

I'm planning on an exhaust very soon, so I figured I'd do my jetting now. Running rich can't hurt anything, other than running through plugs right?