[xtremekfx]

I have an r-4 whitebrothers slip-on noss k&n proflo kit and i put 2 shims under needle and I am at a 165 main the bike runs great but plug check is showing lean plz help?

 

[shortcut]

What rpm is it lean at? you could be lean on the bottom fat in the mid and
fine on top.thats why in order to get the proper setting you have to check
the entire range.this is easy to do if you have a tach,without a tach you
have to use throttle positions ie;1/4,1/2,3/4.start with a strait road/trail
pick a gear that you can run for about 5 seconds.after the aloted time
either turn the key off or hit the kill sw. while maintaining the givin throt.
pos.check the plug at that point and it will tell you what needs to be
adjusted. you can also find a lot of info on www.factorypro.com

Jeff

 

[KFXKID]

what pilot are you running? also, when the quad is idling, run the throttle up slowly. if you are choppy in the first 1/4, up the pilot. if you are choppy thru the next half, re shim the needle so the needle is up (shim closer to the tip of the needle). if it is choppy at the top 1/4, (which i don't think that it is) go up with the main. a 165 i think would be fat for your combo, but that is what i think. good luck and let me know what happens. :wink: