Cam Shaft Bearings
  • holsa912
    Posts: 6
    Joined: Fri Feb 16, 2018 9:13 am

    Cam Shaft Bearings

    by holsa912 » Sat Oct 20, 2018 2:31 am

    Does anyone know if you can replace the bearings on the cam shaft of a CRF250X 2006, rather than having to buy a whole new assembly? I've been to a local dealer this morning who says I can only buy the full assembly, but I have seen bearing kits online.

    The bearing on the sprocket side of the cam shaft cracked as I fastened the bolts for the holder onto it. It must have been misaligned as I used the correct torque as per the manual.

    Cheers!
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    JimDirt
    Posts: 3657
    Joined: Sat Nov 25, 2006 6:31 pm

    Re: Cam Shaft Bearings

    by JimDirt » Sat Oct 20, 2018 7:34 am

    Welcome to the site !! \:D/

    Unfortunately No, the left bearing can't be replaced , only the right bearing , so yes , you will have to replace the cam , sorry .... :cry:
    02 CRF450R
    06 CRF450X
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    Weiser , Idaho
  • holsa912
    Posts: 6
    Joined: Fri Feb 16, 2018 9:13 am

    Re: Cam Shaft Bearings

    by holsa912 » Sun Oct 21, 2018 3:09 am

    Thanks for getting back to me

    Damn, I was hoping I could change both sides :/
  • holsa912
    Posts: 6
    Joined: Fri Feb 16, 2018 9:13 am

    Re: Cam Shaft Bearings

    by holsa912 » Sun Oct 21, 2018 4:47 am

    @JimDirt Thanks!

    Damn, I was hoping that not to be the case.. Ahh well, a new cam shaft it is then.. Do you know if the cam shaft is the same on the CRF250R and CRF250X? I'm looking at a few breakers, but can only seem to find them for the 'R' version and not the 'X'.
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    JimDirt
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    Joined: Sat Nov 25, 2006 6:31 pm

    Re: Cam Shaft Bearings

    by JimDirt » Sun Oct 21, 2018 9:20 am

    The grind is different , the X has a mellower profile and is not as aggressive as the R , some people change them for performance gains , it really depends on what usage you want with the bike , if its slow trail or single track riding , the X cam is not as much of a handful of power down low like the R cam is , you may like the R cam profile , I run a HotCams Stage 1 in my 450X and use it for tight single track as well as open desert riding , and i love how the bike responds , though more R cams are best suited for desert type riding when used in a X

    Its a matter of , if your happy with the power delivery of the X cam then I would just continue with it , not everyone likes or needs the performance gain you get with a cam swap , not saying the bike will be uncontrollable , it will just have a more abrupt power delivery .... If you can get a R cam cheap , then try it out , if you don't like it , then continue looking for a X cam
    02 CRF450R
    06 CRF450X
    Image
    Weiser , Idaho
  • holsa912
    Posts: 6
    Joined: Fri Feb 16, 2018 9:13 am

    Re: Cam Shaft Bearings

    by holsa912 » Mon Oct 22, 2018 9:39 am

    Ok that sounds better! Did you do a straight swap of the cam on yours, or did you change the head/valves springs etc? I've read somewhere that if you change the cam you need to ideally change the cam, but I'm not sure how accurate that is?

    I do mostly single track riding too (though there isn't much desert here in the U.K. :lol: )
  • holsa912
    Posts: 6
    Joined: Fri Feb 16, 2018 9:13 am

    Re: Cam Shaft Bearings

    by holsa912 » Thu Dec 06, 2018 3:34 am

    Update**

    Swapped the X cam out with an R cam and did the CCC mods too, the bike has been transformed, much more power down low and throttle feels a lot more responsive! Sorted out my jetting at the same time, and doesn't seem to bog as it used to. Surprising what small changes can do!
  • User avatar
    JimDirt
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    Re: Cam Shaft Bearings

    by JimDirt » Thu Dec 06, 2018 12:35 pm

    Glad you liked the change , yea , the power delivery is different , and if it suits the riding you do , then that is great \:D/
    02 CRF450R
    06 CRF450X
    Image
    Weiser , Idaho

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