I have been contemplating on moving up to a Summit 800 from my Summit 600 SDI but have been hearing some good things about Big John's motor upgrade for the 600 SDI to a 700. Anyone run one of these and if so, how do you like it? Any word on the reliability of this mod? Would save me a ton of money over buying a new XP Summit or Freeride if this mod is as good as i've been hearing. I'm looking at maybe next spring after the riding season is over to make the switch, one way or the other.
http://www.sledheadracing.net/#!__products
http://www.sledheadracing.net/#!__products
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