Does anyone know what the stock jet size is for an '03 Raptor? The reason I ask if becuase I just paid a local dealership to re-jet it, and they put in 155/155 @27.5... and I'm wondering, isnt that the stock jet size? Did they screw me?

Thanks

 

Not really since the bike is lean when you buy it. that way to make the EPA happy that we are not pollute, my ****!! Also is the pipe stock? Stock jetting I believe at 144/146 somewhere in that range.
The dealer rejet for you then you might be in the ballpark. I wouldn't worry about it, go out and ride and see what you THINK of it!

Go out and have fun.

 

Big Gun Pipe, K&N Filter and I hope to have it set up to run without lid pretty soon,, and they actually jettted it to 155/150

Thanks Desracers

 

The stock jets for the raptor are 140/145. (I got the info about the stock jet sizes from an article in Dirt Wheels Raptor pipe shoot out) I just installed a complete Yoshimura Comp. exhaust today and the instructions said if no air box mods were used to leave stock jets, but it doesnt run smooth from just above idle to 1/4 throttle. Should I rejet even if Yoshi said not to?, or is there some other adjustment needed?

 

Good question,.,., wish I had an answer.,.,.,[img]i/expressions/face-icon-small-frown.gif[/img]


Yoshi pipes are bad as hell,.,.,.[img]i/expressions/face-icon-small-smile.gif[/img]

 

[img]i/expressions/face-icon-small-smile.gif[/img] try this ---- set your low speed mixture screws out to 3 turns out as a base point---play with them at bout a 1/4 turn per adjustment to smooth out your idle and improve your 0 to 1/4 throttle response--- if that helps but is still not good---go to your needle---raise the needle -- put the clip 1 step LOWER than what it is --readjust low speed mixture screws--maybe--bike is a little lean from the crate anyway---ya outta be close to good at least at around sea-level to 3000 feet

 

Hey bro i put on a full yoshi system with a proflow kit and outerwear and it rips!!!!!!i went with a150/155
and 1 1/2 turns on the fuel mixture screw...2 holes in the airbox and a trimmed snorkel,There is a thin piece of rubber between your snorkel just trim it out so it's hollow,But when i ran without snorkel it diden't idle right...I tell you it was a big diffrence i have to learn how to ride it again,It's not to loud at idle but when you gas it it sound like thunder...