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Jetting w/ Big Bore kit?
  • Christi20
    Posts:4
    Joined:Fri Nov 05, 2004 6:24 am
    Jetting w/ Big Bore kit?

    by Christi20 » Mon Nov 27, 2006 9:51 am

    I just rebuilt my 04 CRF250X with a 280 big bore. What jetting should I start with?

    Mods:
    07 head (ported by RHC), RHC valves, springs, keepers
    Athena 280 Big Bore Kit
    cut out air box
    Dr.D exhaust
    cut pink wire
    smog block

    Any help would be appreciated.

    Suggestions on main, pilot, needle please

    BTW,
    I use this bike mostly for Desert Racing in low elevation California and some trail riding up to 6000'
    Proper Planning Prevents Poor Performance!
  • Asmith
    Posts:14381
    Joined:Mon Apr 10, 2006 7:52 am

    by Asmith » Mon Nov 27, 2006 7:07 pm

    Main 162
    Pilot 42
    Needle JD Red 4th clip
    or
    Honda # 16204-MEN-671 4th clip
  • Christi20
    Posts:4
    Joined:Fri Nov 05, 2004 6:24 am

    by Christi20 » Wed Nov 29, 2006 6:51 am

    Thanks for the advice!
    Proper Planning Prevents Poor Performance!
  • mr.wannaride
    Posts:14
    Joined:Mon Jan 08, 2007 10:23 pm

    by mr.wannaride » Tue Jan 23, 2007 11:40 pm

    just had a quick question for ya,(i noticed u have the big bore kit)
    was the athena big bore kit really worth it if so where were the most power increases felt?
    thanks!
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