Big Bore Complete Kit (900cc) / Patriot 850 CHOOSE SLED FOR CLUTCH KIT:TRAIL *This Brake Kit may fit

*This Brake Kit may fit 14-inch wheels

View or download the weight setup sheetHERE

No need for twin pipes any more

Choose the compression ratio that best matches your setup during checkout:

Wossner pistons are German made to the highest standards in the industry

Big Bore Complete Kit (900cc) / Patriot 850 CHOOSE SLED FOR CLUTCH KIT:TRAIL *This Brake Kit may fitThe Polaris 850 with its huge 74mm stroke was just asking for a bigger bore and we have done our homework to bring you the 900cc Big Bore. The all new piston was designed from scratch to accommodate all of the needs of the 900. The all new 88mm piston is an ultra high quality dual ring forged piston. Bikeman exclusive head profile giving you the most focused energy possible to make the most efficient power and maintain knock protection. If you are a