2009 CRF250X Athena Big Bore Kit
Posted: Fri Apr 05, 2013 10:23 am
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.
Thanks for any/all input to help make this a successful project.