If you go up on the pilots for the raptor, does it make it richer or leaner?

 

I'm no expert, but it is my understanding that as the number (or size) of ANY jet goes up the opening is bigger, which allows more gas to flow thru, and therefore it gets richer. The pilot circuit on the Raptor tends to be too lean and many have suggested going from 22.5 (I believe that is stock) to a 25 or a 27.5. You can also screw the idle adjustment screw out from their normal one turn to richen things up.

 

FMFracing.com now has a chart to help out on the pilot jet selection if you are running an FMF pipe and or K&N filter, etc.