How to know if a bike needs Re-jetting.....?



2 replies to this topic
  • humbertob

Posted January 22, 2002 - 06:09 AM

#1

I'm just wondering how to know if a bike needs to be re-jetted.......? Any advice !

Thanks ! :)

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  • mcarp

Posted January 22, 2002 - 09:54 AM

#2

Lean usually comes with backfiring, surging, and a tin-can kind of sound. My WR used to surge an d the idle was very erratic when it was new (lean)

Rich will foulplugs, the tailpipe will become black/sooty, response will not be crisp, acceleration will feel sort of lame. Will atart w/o choke.

There are other signs, do you notice the bike running a little strange? If so, detail you're riding area,temp,elevation, and all mods with things you've noticed, and we'll try to help

Mike

  • MikeOK

Posted January 22, 2002 - 05:40 PM

#3

Give us your symptoms and it will be easier to tell you what to do. Also give settings and altitude if you can. Usually you can tell a lot by the color of your spark plug. It should be a nice tan or beige color. There are ways to tune it for low throttle, mid throttle, and wide open.

My bike was running a bit lean, causing my bike to pop on decell. I was able to correct it by adjusting my air screw and going from the stock 42 pilot to a 45. My head pipe also glowed red excessively before the jet change, but mainly in the colder weather which causes your bike to run a bit leaner than when it is hot outside (cold air is more dense). Mine was jetted just about right for 800' ele and about 108 degrees f lol.





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