Jetting help?? YZ426F

2 replies to this topic
  • Ztard

Posted September 05, 2006 - 06:42 PM


OK I have a stock 2002 YZ426F that I'm setting up for Sumo racing. Stock airfilter, and box, Stock pipe but it has a pro motion billet spark arrestor. I live in Michigan like 600-700ft alt. Are these bikes factory lean like the rest? I don't have any issues right now it seems to start and run fine, just fishing for opinions...........or the hot set up :thumbsup:

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  • mpl239

Posted September 05, 2006 - 08:52 PM


Repost on the jetting forum, might get an answer there. Seems as if it starts and runs well, why mess with it. Fix what is broke.

  • aford541

Posted September 05, 2006 - 09:21 PM


BK mod is helpful on the 02 426.

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