Topic: XR600 CBR Wheel conversion
Posted: 12/19/2008 4:17:42 PM
My rear wheel is a 5" CBR600 17" wheel w/ a 160 tire. the 160 fits well, and when your trying to fit your wheel on you can see on the left hand side of the inside of the swing arm there is a lip which is part of the machining of the aluminum. i grinded this all away for more clearance. As far as bearings go, you need to find bearings that will fit on the XR axle and in the CBR wheel, so take the wheel and measure where the bearing sits to see what the # is b/c i i don't know the part numbers off hand. I also made my own spacers which go inside of the wheel out of a solid piece of round aluminum. you need to have this put in after your first bearings are put in then slide this in and then your next bearing. otherwise you'll miss this part. it needs to be long enough so as to be long enough to touch the bearings from the inside of the rim but not so long that it makes them under stress, pretty much acts as like a cushion for the bearings for when you tighten your axle. you will need a conversion sprocket which accepts a 520 chain but fits the CBR wheel bolt pattern. Sprocket specialists and I think JT sprockets makes them. i shaved the sprocket bolts down CONSIDERABLY b/c there is such a tight clearance. as far as spacers i made a shim 3.77mm thick, then used the stock XR600 rotor side spacer used on the dirt wheels. then the wheel goes on, then i made a shim 2.15mm thick. then the caliper bracket which slides on and the chain adjuster and such.
The rotor seems to fit almost perfect, my stock XR rotor is a little skinnier so you may have to push your piston in to fit it on. but you will have to shave the mounting bolts as you did for the sprocket b/c of clearance issues.
now these are shims i made w/ washers so you might be able to get away w/ making them a little smaller/bigger but just try it and go from there. just MAKE SURE YOUR SPROCKETS ARE IN LINE W/ EACH OTHER.
For the front i have a different set-up b/c i'm using YZ125 forks. But the front is a CBR900 16" wheel. i made my caliper bracket using cardboard and then using a CNC machine to make it from aluminum. then i had to find bearings to fit the YZ front axle and the CBR wheel as well, just as easy as the other wheel, just measure it w/ a micrometer and you'll be good. you also may need to make a inside wheel spacer for this wheel as you did for the rear, i know i did for my set-up. then i used washers which i slide onto the axle along w/ the wheel to space it to line up the caliper and center the wheel. this step i was able to only have to actually make one shim b/c i had some fat washers so i didn't need to many, maybe like 10 or 12 total. i would make actual spacers after the fact, but i just never got around to it. haha. umm, If i forgot anything just let me know, its hard to come up w/ all this right off the top of my head, but i'll remember if you ask. Special thanks to Kubiak, he was a VERY big help in doing this project and supplied my w/ my first conversion sprocket. Thanks Kubiak
Reply by Admin on 12/22/2008 1:20:44 PM
Link to kubiak's pictures of his CBR wheel conversion: kubiak's CBR wheel mod (dead link)
Reply by wornknobby3 on 12/24/2008 1:44:44 PM
umm i think the link isn't working...
Reply by Admin on 12/25/2008 09:48:56 AM
I copied the link directly from kubiak's email and it was working when I posted it. MSN is the worst for posting pictures. I think they cycle URLs so you can't link directly. Try this for now: kubiak's CBR wheel mod (dead link)
Reply by kubiak on 12/26/2008 12:33:20 PM
thanks admin!i will try to do a writeup for the pics soon.thanks again!
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