My brother n law and I ripping around Northern WI. 600R Polaris IQ mod with Race Dept twins, 42mm rack carbs, billet High Compression head, ported case running stock cylinders. Bro's sled is 600ho full ported race motor with 38mm rack carbs, Race Dept Billet Head, running a DYNO Port Single and can. Both sleds run on 111octane and Klotz R-50 Premix.
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