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HELP MODDING CRF 125

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My buddy bought himself a brand new CRF 125 and we want to mod it out. We're looking for any info possible.

We went to go with a higher compression piston if there's one available. That 9:01 wont work. We would like to put a 17" rim on the rear but are wondering if it will fit/or what mods are needed . Thanks for your help guys.

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probably needed to be converted to a big wheel for the 17" rim which im not sure exist.

Rejet would be a nice improvement and maybe an exhaust

cr 85 forks and shock would make the suspension better.

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Octane booster. The tank is small, use only about a half bottle. You'll notice the difference have fun.

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