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2009 CRF250X Athena Big Bore Kit

Posted: Fri Apr 05, 2013 10:23 am
by mdoran
I have researched and am ready to buy/install an Athena 280 big bore kit along with an FMF megabomb/Q4 exhaust system. For the time being I will be using everything else stock. I am curious as to what jetting I should use and any other useful information that can be provided. My riding is usually in Michigan and Tennessee say 500-2500 altitude max.

Thanks for any/all input to help make this a successful project.

Posted: Fri Apr 05, 2013 7:57 pm
by crfsonly
repsonded to your email on this question. check there for my response.

ken