head shake
  • stevo
    Posts:2
    Joined:Tue Jan 02, 2007 11:53 pm
    head shake

    by stevo » Wed Jan 03, 2007 12:07 am

    hey guys
    i am having a problem with my crf230f when travelling at high speeds hitting little bumbs the front end goes all out of control please help.
  • Aussiecrf230
    Posts:1964
    Joined:Fri Jan 06, 2006 11:11 pm

    by Aussiecrf230 » Wed Jan 03, 2007 3:59 am

    Stevo,

    Check your wheel bearings and Stem/head bearings.
    Also check for loose bolts/nuts in front end.

    If you haven't greased your Stem/head bearings it maybe time to do this whilst you are checking.

    Let us know what you find.

    I assume your tyre has at least 15PSI and your spokes are firm.
    Ray
    Australia

    CRF230F 2004
    C30F Power Up needle
    Mains 132
    Idle 45
    2 turns out
    Baffle out, Screens In

    It starts,it runs,it gets to where all CRFs can get to without the valve or valve plate dramas
  • User avatar
    KRCRFs
    Posts:108
    Joined:Sat Oct 16, 2004 6:35 am

    by KRCRFs » Thu Jan 04, 2007 6:43 am

    This can also happen if you have messed around with your geometry, like installing a lowering link (Kouba), etc.

    In my case, when I lowered my 250X, I had head shake in the top end of 4th and all of 5th gear. I solved it by changing both my front and rear sprockets, thus widening the stance slightly.
    Kim's: 04 250X
    13/51 with +11
    Main Jet: 138
    Air Screw: 2.5 Turns

    Kathy's: 04 230F
    13/48 sprockets
    Main Jet: 132
    Air Screw: 1.5 Turns

    Common:
    Pilot Jets: 42
    Stock Needles: 4th Pos
    No Screens or Baffles
    Open Air Boxes, Twin Air Filters
  • Aussiecrf230
    Posts:1964
    Joined:Fri Jan 06, 2006 11:11 pm

    by Aussiecrf230 » Thu Jan 04, 2007 3:23 pm

    If you have a lowering link fitted you can also move the forks up through the triple clamps a little 5-10mm to give the forks the right rake again.

    KRCRFs - good idea about increasing the wheelbase to help change the angles back.
    Ray
    Australia

    CRF230F 2004
    C30F Power Up needle
    Mains 132
    Idle 45
    2 turns out
    Baffle out, Screens In

    It starts,it runs,it gets to where all CRFs can get to without the valve or valve plate dramas
  • crf230hondaman
    Posts:13
    Joined:Tue Aug 22, 2006 4:21 pm

    by crf230hondaman » Fri Jan 05, 2007 8:41 am

    mine did the same thing one time and all I did was just spray some lube spray on there frequently and it has not happened to me again.

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