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Thread: cr85

  1. #1
    Join Date
    Aug 2010
    Location
    central Jersey
    Posts
    44

    cr85

    Seems week 05 28d slide 142 45 pod air filter screw 2 1/2 out stock motor and pipe with 15/48 gearing. Weak bottom seems to need alot of clutch and gas just to go. Mid and top not bad. Need to adjust? Jetting gearing maybe 48 pilot? ??? Any help

  2. #2
    Join Date
    Aug 2010
    Location
    central Jersey
    Posts
    44
    Doesn't seem to have that clean crisp snap barely wants to get out of 1st

  3. #3
    Join Date
    Nov 2007
    Location
    North Augusta,SC
    Posts
    601

    ?

    Your jetting is in the ball park for a stock motor. Might be time for a top end rebuild. Check compression and plug chop.
    Todd Jones
    Zach Jones Racing #1,
    2012 GNCC Youth Rider of the Year
    2012 GNCC Overall National Champion
    2012 GNCC Open Class Champion
    2011 GNCC Mod National Champion
    2011 MidEast Harescramble Series Mod Champion
    North Augusta, SC

    Special Thanks to our 2012 Sponsors:

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  4. #4
    Join Date
    Aug 2010
    Location
    central Jersey
    Posts
    44
    Compression is 145 haven't done plug chop yet. Can't see why it takes so much effort to get rolling out of first maybe gearing?????

  5. #5
    Join Date
    Sep 2010
    Location
    Hutchinson, MN
    Posts
    120
    Gearing seems kind of tall for a stock motor.

  6. #6
    Join Date
    Nov 2007
    Location
    North Augusta,SC
    Posts
    601

    gearing

    I agree with otteboys. We run a 14-48 and a 14-50 in the woods.
    Todd Jones
    Zach Jones Racing #1,
    2012 GNCC Youth Rider of the Year
    2012 GNCC Overall National Champion
    2012 GNCC Open Class Champion
    2011 GNCC Mod National Champion
    2011 MidEast Harescramble Series Mod Champion
    North Augusta, SC

    Special Thanks to our 2012 Sponsors:

    Maximum RPM
    Fly Racing
    FOX Shox
    Amsoil Racing
    Gaerne Boots
    Fasst Co. Flexx Bars

  7. #7
    Join Date
    Aug 2010
    Location
    central Jersey
    Posts
    44
    Was thinking of running 13/48 instead of 15/48 to see if bottom wakes up. Mx application

  8. #8
    Join Date
    Sep 2010
    Location
    Hutchinson, MN
    Posts
    120
    We run a 14/48 for mx with a built 07 motor and pipe, thinking of trying 13/46.

  9. #9
    Join Date
    Aug 2010
    Location
    central Jersey
    Posts
    44
    Again that's with me on it at 210 my sons about 100 in riding gear .it pulls hard mid and top with me on it.he needs a little more bottom for coming put of corners. Maybe ill try both 14 and a 13. Don't want to sacrifice my mid or top.what chassis you running

  10. #10
    Join Date
    Sep 2010
    Location
    Hutchinson, MN
    Posts
    120
    JB chassis. Keep in mind these motors don't have a lot of low end, you really have to keep them wound up.

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