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Do My Uprages Require a ReJetting?
  • chopshop
    Posts:10
    Joined:Sat Mar 08, 2008 11:49 pm
    Do My Uprages Require a ReJetting?

    by chopshop » Mon Mar 24, 2008 7:03 pm

    Here is a list of the uprgrades i just put on my 04 CRF250R. I ride trails mostly. Do i need to re-jet? if so, what?

    -K&N Air Filter
    -Stage 1 HotCam
    -Rev Box
    -Big Gun Evo X (w/ spark arrestor)
    -I run a 450R size rear tire.

    i live at 1500ft but often go up to 3000ft. I live in southern california so weather ranges from 50F - 100F

    Thanks!
  • User avatar
    djh65
    Posts:1635
    Joined:Mon Jan 29, 2007 3:53 pm

    by djh65 » Mon Mar 24, 2008 9:46 pm

    Yes yes yes. you opened up the front and the back with a big ole blockage right in the middle.
    David
    06 HD450X made in america.
    Faster and faster til the thrill of speed overcomes the fear of death!!!!
    Image
  • CRF916
    Posts:1314
    Joined:Thu Jul 27, 2006 1:00 pm

    by CRF916 » Mon Mar 24, 2008 9:52 pm

    djh65 wrote:Yes yes yes. you opened up the front and the back with a big ole blockage right in the middle.
    David


    +1 Thats a great explanation!
    0'6 CRF450XXX

    Image
  • User avatar
    djh65
    Posts:1635
    Joined:Mon Jan 29, 2007 3:53 pm

    by djh65 » Tue Mar 25, 2008 7:55 am

    I seem to have a great economy for words today. lmao.
    David
    06 HD450X made in america.
    Faster and faster til the thrill of speed overcomes the fear of death!!!!
    Image
  • chopshop
    Posts:10
    Joined:Sat Mar 08, 2008 11:49 pm

    by chopshop » Tue Mar 25, 2008 11:05 am

    so should i just buy a Stage 1 DynoJet Jetting kit?

    or whats the best way to go. I guess the goal is a bit more fuel to compensate for the increased airflow from the K&N.
  • Asmith
    Posts:14381
    Joined:Mon Apr 10, 2006 7:52 am

    by Asmith » Tue Mar 25, 2008 4:20 pm

    chopshop wrote:so should i just buy a Stage 1 DynoJet Jetting kit?

    or whats the best way to go. I guess the goal is a bit more fuel to compensate for the increased airflow from the K&N.


    Personally, I would ditch the K&N filter. It's not a good system for the kind of dust you'll see.

    Next I would go with the JD Jetting kit over the Dynojet anyday...

    http://www.crfsonly.com/catalog/product ... ts_id/1095
  • chopshop
    Posts:10
    Joined:Sat Mar 08, 2008 11:49 pm

    by chopshop » Tue Mar 25, 2008 6:11 pm

    Personally, I would ditch the K&N filter. It's not a good system for the kind of dust you'll see.



    would an outerwears cover do the trick? i dont ride in very dusty conditions either.

    Next I would go with the JD Jetting kit over the Dynojet anyday...



    $72!!!! do i even need to buy new jets. Jetting is one area i know nothing about. I can rebuilt a 4 stroke engine top to bottom but i know nothing about jetting.
  • [email protected]
    Posts:5039
    Joined:Sun Aug 14, 2005 6:21 pm

    by [email protected] » Mon Mar 31, 2008 11:47 am

    i know nothing about jetting
    .
    All the more reason to buy it.
    $72!!!!

    Sell the rev box, that's about as much value as a paper weight. :lol:
    You won't find many people less than 100% happy with
    what they bought from JD Jetting.
    Next I would go with the JD Jetting kit over the Dynojet anyday...
    We have heard of nothing but bizzare, out of touch recommendations for CRF's with Dynojet.
    As far as do you need to, break out your owners manual and look at what spark plug color can tell you. Doug
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