BMP AXYS 860 Complete Big Bore
Are you looking for the most possible horsepower and torque from your AXYS 800 H.O.? You should know by now to look no further than BMP as we crank out the most powerful Polaris 800 motors on the planet. Our big bore kit delivers unreal performance and longevity. We spent many hours on the dyno developing this kit and a full year on the snow testing to perfection. This kit cranks out 190 horsepower with huge arm pulling torque (120 ft/lbs)!
Our recipe is simple yet effective: We start off with boring your stock cylinder out for those larger pistons. Next, we draw out a cylinder port map and get to work machining the ports to the specs we know provide the most horsepower possible. The cylinders are then sent out for Nikasil plating and measured to make sure piston to cylinder clearances are within spec. Once the cylinders are 100% completed, we must bore your top case half and grind your exhaust valves to the bore and ports (Must send complete exhaust valve assembly but DO NOT DISASSEMBLE THE ASSEMBLY). The next step is our billet head kit with our specially designed domes for the 860cc power plant which are available in low or high compression. Our custom made Wossner pistons are about as trick as a piston can get! These are coated to help aid break-in and lubricate the skirts. These are also a Durability style piston in which the skirts are longer for less piston rock and increase top end life while also featuring lubrication holes and rings that have further spacing for better cooling properties. This kit also includes our BMP pipe, BMP Y-Pipe & our custom tune loaded via the Bully Dog GT. Clutching is also 100% necessary so we of course include our Stage 2 clutch kit. If you are riding below 6000 ft you will also need to purchase our big bore muffler for proper performance. Our complete kit ensures you get everything needed to make a stock sled into a complete monster! Cylinders are on an exchange program while exhaust valves and top case halves are simply machined and sent back to the same customer. Depending on exchange cylinder stock, turnaround time is 2-5 weeks on this kit. Please e-mail or call for current availability
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