If you own a KTM 250 SX that you’d like to get more power out of it, you should seriously consider turning it into a 300 SX with the SXS 300 kit. This SXS 300 kit will add more horsepower than any mod you could ever make to your stock 250cc engine. This kit contains all the parts required for converting your 250 SX to a 300 SX for the MX3 class : a new cylinder, head, piston, rings, wrist pin, gaskets, clips, o-rings, power-valve parts and black box. No need for the jets to be changed on the 250 SX carburetor.
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