Jetting on Polaris 450 MXR.

[Joe Barnet]

I have a 2008 Polaris, 450 MXR. Just purchased the HMF muffler. I'm at sea level but need to know what pilot, main and clip position it should be on, also how many turns for the fule mixture screw. Any help would be much appreciated.

Thanks.

[Mike/HMF]

Baseline Jetting RECOMMENDATIONS
Main Jet: 170
Pilot Jet: 45
Needle: 3rd FROM TOP
Fuel Screw: HIGHEST SMOOTH IDLE

[Joe Barnet]

Replaced jet, runs a heck of a lot better, pops during deceleration once or twice otherwise perfect. Might try 172-174. Thank you very, very much.

[Mike/HMF]

Its very normal for that engine to pop on decel.