I just bought two new Raptors and put White Brother’s R4 Silencers on both.

Everything else, including the airbox and air filter, is stock.

I ride at sea level in Mexico and in the desert surrounding Phoenix.

I am going to increase my Main Jets to 145/150 and the Pilots to 25. I am going to leave everything else the way it is.

With the larger Pilot Jet, will I need to re-adjust my air screws? If so, which way should I turn them? Does counter-clockwise (out) make the mixture richer and clockwise (in) make the mixture leaner?

Does this sound like a good increase due to the Silencers?

Thanks,

Rob

 

Personally, if I plan on leaving the lid on, I would start with 160-165's (overkill, but safe) and work my way down if necessary. I ran 145-150 with the stock exhaust /w baffle removed once upon a time at sea level. Turn the pilots out (counterclockwise) a half turn from their present location. May as well toss the lids and go pro-flo, you eventually will anyway...[img]i/expressions/face-icon-small-wink.gif[/img]

 

Does it richen it up by turning counter-clockwise?

If I turn them both out 1/2 turn, should I still install the larger pilot jet?

 

I had a ton of trouble with my carbs blowing off in the past and had too run 27.5's too cure the problem. This is'nt a problem for all Raptor owners for some reason.....so for you, I would try the stock pilots if you have'nt bought the larger pilots yet. With the stock pilots, I would back the pilot adjustment screws out 1 full turn (richer) and see how the machines like it. Don't be surprised if one machine likes more or less jetting too run strong.

 

Gary:

Excellent advice!

I did the re-jet tonite as you described and it went perfectly.

Thanks!

Rob

 

i see you bought your 13 year old son a raptor!!! nice dad [img]i/expressions/face-icon-small-happy.gif[/img] i hope he doesnt try to show off

 

no kidddin

no joke

 

Umm guys, hes a 13 year old with a raptor.. I think hes going to show off, maybe not as bad as his dad, but he will LOL

RoostKing

 

Good too see things went smooth. By the time I was 13, I was riding a Elsinore (SP?) 250.

 

glad to hear the predators ran like crap,are you happy now with the rappy..