2007-2011 Polaris IQ Snowmobiles Service Manual, Page 170Get this manual
Fuel Systems Main Jet
When the throttle opening becomes greater and the area between the needle jet and jet needle increases, fuel flow is metered by the main jetThe number on the jet indicates the amount of fuel which will pass through it in one minute under controlled conditionsLarger numbers give greater flow, resulting in richer mixtureMain jets are screwed directly into the needle jet base
PistonThrottle Valve
Jetting Guidelines