Big Bore 900 Piston / Patriot 850 ptbct Simply pull the side panel

Simply pull the side panel off the sled and use the different length set screws or tungsten slugs to adjust RPM and belt pinch

22UP MATRYX BOOST STAGE 4 HILL CLIMB RACE+50HP 110 OCTANE v1 NO BREAK IN

Sheds 1 pound

resulting in a better performing and longer lasting Rev 800

This will not fit 583 fan cooled motors

Big Bore 900 Piston / Patriot 850 ptbct Simply pull the side panelWiseco 900 Big Bore Piston and Factory 9R Piston Direct replacement for our 900 Patriot Big Bore Choose between forged or Cast Piston If you are refreshing your top end select QTY 2 IF YOU HAVE OUR BIG BORE PLEASE SELECT THE SAME PISTON THAT WAS IN YOUR KIT ORGINALY. THEY ARE DIFFERENT SIZES AND YOU CAN NOT SWAP BETWEEN THE TWO TYPES. WISECO AND FACTORY 9R