Is there any way i can modify my fully stocked polaris 90. Like to screw holes in the filter or something. I dont fully understand the whole re jetting thing?What do u do and to what ? Also r there any restrictors on my quad that i can take off? Thanks

 

sportmanrider, is that 90 a 2stroke or 4stroke?

This link has some good diagrams on jets

http://www.motocross.com/motoprof/mo...1/carb101.html

And this one has some good carb info

http://victorylibrary.com/tech/mikuni-2.htm

This should give you a basic understanding of jetting

 

It is a 2 stoke and dont u drill hole in the filter or something?

 

Drilling holes in the airbox would make your intake exposed to water, not good. I have never tried it, and I am not familiar with your model. I think TRextommy knows your machine.

 

Sportmanrider90, my sons had a restriction on the CDI, that was it .... I'd ask your parents if it's still there .... Enjoy!

 

I think u drill holes in the jetting or carb or something i not sure i just assumed it was the filter? Also what was the restrictor on the cdi ??? Would i just take it off?

 

This is what we did for our Predator 90 - not sure if it's the same for the Sportsman 90 or not.... Look on the left under the front fender for a black box - disconnect it and remove the 2 screws inside, underneath them you should see a metal limiter - remove it, replace the 2 screws and reconnect the CDI box. If it isn't there, your dealer may have removed it already. You should have the instructions in your manual as well... Good luck...

 

Sportsman, Sounds like you need to give me a call. As far as jetting. You need to rejet the carburetor everytime you change something in the intake or exhaust of your engine. I guess you are talking about drilling out your jets. Don't do that unless you know how. It's not hard but jets are only $4 each. Why bother unless you are trying to precession tune the machine. (dyno) Jet sizes available will be good enough for almost anyone. Jets are sized in .025mm differences. IF you need to dial in more than that, you probably know more than most anyway.

 

hey quadmon,......... that "metel limiter" what exactly did it help?...im looking to inprove my sons sp90 but it seems to be as faast ans as quick as it will go. he goes about 30mph wide open. im new to the mini quad thing. thnks

 

Metal plate is on the Predator.