what jets?
  • TDW
    Posts:113
    Joined:Sat May 26, 2007 9:27 am
    what jets?

    by TDW » Fri Jun 15, 2007 8:34 pm

    I am in the process of a top end rebuild and want to get input from others who have been down this road about rejetting my stock 250x with honda parts. I am using the stock camshaft, the air box is opened up on top and the screen has been removed, also the exh baffle is removed. elev where we ride the most is 1000-3000' above sea level. The bike did have a noticeable bog when twisting the throttle quick, the accel pump oring mod should fix this right? Thanks for info
  • Asmith
    Posts:14381
    Joined:Mon Apr 10, 2006 7:52 am

    by Asmith » Fri Jun 15, 2007 9:20 pm

    The JD kit is excellent for rejetting. It now contains the 42 pilot as well as the o-rings for the mod.

    If you want to use Honda parts to get close, here is the set up:

    Jet, Main (#152) 99101-357-1520

    Needle Set, Jet 16204-MEN-671

    Jet, Leak (#70) 99108-KRN-0700

    Pilot (slow) Jet 99103-440-0420

    Do the o-ring mod using the larger o-ring 3/16 thickness ID 1/4" OD 7/16".
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    KevinM
    Posts:474
    Joined:Tue Mar 14, 2006 12:21 pm

    by KevinM » Fri Jun 15, 2007 11:14 pm

    below is what worked for me.
    09 CRF 450R
    07 CRF 250R
    45 plt /175 main /JD Red-5th pos
    FS 2 trns
    05 CRF 250X
    42 Plt /162 Main /JD Red Needle- 5th pos
    CRFsOnly Fuel Screw 1-7/8 trns out (2 turns winter)
    TwinAir PowerFlo Kit /Opened Airbox /White Bros E2
  • TDW
    Posts:113
    Joined:Sat May 26, 2007 9:27 am

    by TDW » Sat Jun 16, 2007 7:03 am

    This site is really helpful for a do it yourselfer like me, glad I found out about it before I started getting inside the carb. What would be the clip position and approx fuel screw setting, and that is a different leak jet than stock right? Does this leak jet provide more fuel delivery from the Ac pump? thx again
  • Asmith
    Posts:14381
    Joined:Mon Apr 10, 2006 7:52 am

    by Asmith » Sat Jun 16, 2007 7:16 am

    4th clip.

    About 2 turns out.

    Slightly less than stock due to the different taper of the new needle.
  • TDW
    Posts:113
    Joined:Sat May 26, 2007 9:27 am

    by TDW » Sat Jun 16, 2007 9:39 am

    hey thanks again, I will be getting those jets and am waiting for some other parts, hopefully will be riding again before long. My riding buddy who is my 12 year old son broke his wrist playing basketball(of all things) a few days ago so he wont be ready for a few weeks either. :?
  • Asmith
    Posts:14381
    Joined:Mon Apr 10, 2006 7:52 am

    by Asmith » Sat Jun 16, 2007 10:52 am

    Basketball is a dangerous sport...better stick to more safe endeavours like dirtbikes. :lol:
  • TDW
    Posts:113
    Joined:Sat May 26, 2007 9:27 am

    by TDW » Sat Jul 28, 2007 3:52 pm

    Wanted to follow up now that I got the bike running again and have some time on it. I did the AP oring mod and installed all the honda jets that were recommended, but I did make a change after the first ride. I removed the #70 leak jet and put the #55 leak jet back in and I like the #55 better, with the #70 it seemed alittle weak or slow to rev-nothing major but it was noticed. The bigger fuel shot does seem to make it rev a touch quicker or better off the bottom. But its running good and I appreciate the helpful advice. Thx

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