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    How To Replace Dirt Bike Wheel Bearings, 2001 CR250

    The rear bearings on my dirt bike needed to
    be replaced. I purchased pivot works bearings
    from Rocky Mountain Motocross. I have always had
    good luck with pivot works. They are good
    quality and come with everything you need.
    I decided to go ahead and purchase the tusk
    anodized aluminum axle blocks at the same
    time since I would be removing the old ones
    during the installation.
    I also got a motion pro bearing tool to remove
    the lock collar. A good source for these and other tools and parts is

    The first step is to get the bike up in the air and
    remove the rear wheel. After loosening the axle
    nut, you just tap the axle out with a rubber mallet. The RB components lift stand makes
    getting the motorcycle up in the air easy.

    Here is a pic of the rear wheel off the dirt bike. You
    don't have to remove the chain or the rear brake
    from the bike.

    Now put the special tool on the locking ring and
    twist it off.

    The lock/retaining ring came off very easily on
    my bike, but getting it to fit over the seal was a
    little bit of a hassle. The seal could probably be
    removed with a screwdriver first to make it

    Use a large screwdriver to remove the seal from
    the other side.

    Use a large screwdriver again to tap the bearings out from the opposite side. you will need to
    move the spacer to one side or the other in
    order to expose a surface of the bearing on one
    side or the other to tap on. Tap on alternating
    sides to tap them out gradually. There are two
    bearings on the drive side, and one on the brake

    Here is the spacer that is located between the
    bearings. Don't forget to put this back in
    between the new bearings!

    Now, just get a big..hammer, and a socket of the
    correct size and tap the new bearings in. This is
    where you need to remember the spacer before
    you pound bearings in both sides.

    Now install the new lock ring if your bearings
    came with one. I made the mistake of installing
    the seal onto the lock ring before I tightened it
    down, it would have been easier to tighten it
    down and then put the seal on, simply because
    the seal gets in the way a bit.(mental note for
    next time) Tap the seal in the other side also.

    After you put the spacer back on, the wheel is
    ready to go back on. I didn't oil the seals before
    I pushed the spacers through, another good
    idea for next time.

    The finished product! The axle blocks look good,
    and the allow you to move the tire back without
    turning the adjustment screws out to far thus
    making them weaker. They can be installed
    either way depending on axle placement.

    This is also a good picture
    of the pro taper sprocket I installed about two
    months ago. I couldn't see any wear seems to be holding up well considering that it is an
    aluminum alloy sprocket as opposed to steel.

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