Race Gas

I am thinking about running race gas in my kids bikes (2010 KTM 50 SX and 2013 KTM 65 SX) just wondering what if any engine mods that are needed. both bikes have full fmf exhausts on them, high compresion pistons in them ( the number two pistons from KTM ) and the 65 has a jd jet kit in it. 

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