5 replies to this topic
  • FTD

Posted March 24, 2003 - 01:57 PM


Like I have said, a buddy of mine leaned my bike out. He said his was jetted like this. In my ignorance I have no idea where he jetted it at. He moved the needle position and changed the main and pilot jetting. The only differences I have experienced is popping after a high rev and I let off the gas... no clutch and of course it runs better. What are your jetting and needle recomendation? I ride from 5,000 ft to 9,500. Ocassionally lower elevations.

  • Indy_WR450

Posted March 24, 2003 - 05:41 PM


You can search this forum. I beleive a 155 - 160 main,a YZ- EKP needle in #3 clip position with a 38 PJ and a 65 PAJ should be what you find in your search. I am planning on using this as a starting point for my trip to Colorado this summer.

  • LarryCO

Posted March 25, 2003 - 05:03 AM


See my "sig" below for my jetting details. Several other CO folks are running the same setup with great results.


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  • FTD

Posted March 28, 2003 - 02:20 PM


Not as bad as I thought. My jetting is one leaner on the main and pilot and the needle position is 2nd from the top. That should be ok... correct? (5,000'-9,500' riding elevation)

  • Indy_WR450

Posted March 30, 2003 - 02:42 AM


I have to admit that I can only jet by throttle response and poping in the exhaust. If you pop only once in a while from chopping the trottle and you like the crispness of the throttle response in all throttle positions you are probably there. :)

  • foursmoke

Posted March 30, 2003 - 08:22 AM


Hi Indy!
Listen, I get some popping on decell but mostly when I shut down bike I get small pop when engine comes to stop. I've changed main jet to a 160, removed snorkle & baffle, YZ throttle stop, grey wire disconnected. It's not a full backfire just a small pop. I have a 48 pilot & 72 starter on order so I'm hoping the 48 pilot will help.


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