Its a passion racing 12 port rz powervalve cylinder setup with a +4mm crank, 172 psi a cyl, milled head clearanced for stroke, lightened flywheel, flatslide carbs, k&n filters, jetted 25/370, +5 timing, rocket pipes@ sea level. I got these cyls and crank of the guy who had the work done and provided me with the paper work from Jim at passion racing that this blue print was approx 70hp. Yes, hmmmm .......maybe.
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