I just got an RCR stage 1 kit for my trailblazer. I have a few questions about the jetting and thought u guys would know. it came with 150,160 and 170 main jets. im in New york and right know its usually between 20 and 45 degrees......sometimes colder. if i put the 170 mj in will i have to change it for spring and then again for summer? i dont really know much about the jets so i could be completely wrong........any help would be appericiated......also anything else i should know about the kit before i begin the install......thanks

 

You need to get more familiar with carbs in general.

Go to this web site for more info........

http://www.powroll.com/tech_specs_jetting101.htm

 

Bigger is better, better to wash out the rings than melt a hole in piston. But to make the most horse power you need a perfect balance between the two.

Put the 170 in.

Most quads are jetted for 40-80 degrees and 0-2000 feet elevation. That means when it is below 40 or about 80 deg. then you need to rejet. Polaris has a jetting chart for all of their quads.

When I jet, I go to the biggest jet. In your case, the 170 jet I would go to a 185 jet and if it blubbers out on top end go down 1 size at a time until it stops blubbering.
In the winter you need more jet and raise the needle one, in the summer you need less jet.

On a 400 Polaris 2-stroke I had, I change the muffler and reed cage, went to a .040 wiseco piston and the kit recomended a 230 main jet. I settled with a 270 and it ran perfect for me.
In the winter I went to a 290, and in the dunes went to a 260 main.

Good luck............

 

thanks ch701sp that site got me a little more up to par with carbs! Handycap thanks for all the info.......it really helps, and ur definetly right, i would much rather wash out the rings then burn a hole in the piston!!!!!!! well thanks again and ill let u know how everything goes......hopefully soon

thanks,
mustang

 

how did u like the rcr kit? was it worth the money? do tell??

 

well i dont have it on yet.......i havent got the chance yet. hopefully this weekend. as soon as i do i will let u know.
mustang

 

awesome,, sounds good, what all did it come with and how much did it cost?

 

It came with pipe, silencer and all the hardware to install it, 3 main jets, air filter and modification directions, and clutch spring. it is right around $325. check out rittercycle.com, it gives u all the info.
mustang

 

can u describe how the airbox mods are done? give a little step by step? thanx a lot.[img]i/expressions/face-icon-small-smile.gif[/img]

 

Actually i just did a post on that and havent got an answer. I havent quite yet figured it out myself. all it came with for that was the air filter. i think im suppose to cut some things or do something other than just install the air filter. when i figure it out i will definetly let you know!