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Discussion Starter #1
so i have a 02 660 with a yoshi slip on and k and n filter with a pro flow adapter well i moved from southern nevada pretty much at sea level to idaho where im now at 6500 feet eve. now my raptor sorta runs( i had to put in a la one way but it runs rough and wont ideal . some say to adjust the the carbs and the shops want me to buy a new jet kit and pay them to figure it out.
what do you guys think?? i know taking it to the shop wouldnt hurt but i would rether do it myself and save the money for a set of nerf bars
any advice would be helpful thankyou
 

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Master of the Electron
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15,074 Posts
Find out what jets are in the bike (like 160L/165R) and swap them for 15-20 down each. Stock jets (140L/145R) would probably work fine.

Rule of thumb is about 10 lower for every 3000 feet rise in elevation.

Due to the elevation, and less air pressure due to it, your bike is not going to perform as well as it does down lower, but jetting properly will get all you can out of it.

You may also want to turn your fuel screw in 1/2 turn or more, or you'll be too rich at idle and drop the needles a notch or so... trial and error.

Here's a good article on jetting that mentions altitude:

http://www.4strokes.com/tech/howtojet.asp
 
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