Nice! I spent a few hours racing a 585 yesterday, those things move! He was the fastest 4 stroke out of the group. Definitely impressive, the quad being 260 lbs sure puts him at an advantage over my heavy pig. Either way, it put down 80 hp n/a...which is a beast for a yfz IMO.
EKO Engineering made it but they went under..but stellar performance can build you one also..
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