Vertex Cast Replica Piston Kit 24370B YZ85 YZ85B RM65 40cc volume is the VHM

40cc volume is the VHM standard for Yamaha YZ85 and is developed for the best overall performance

KTM 250 FREERIDE All Years

Reduces friction & engine temperatures

aluminium cage that replaces the plastic stock cage

this can break the teeth off the plastic gear

Vertex Cast Replica Piston Kit 24370B YZ85 YZ85B RM65 40cc volume is the VHMMade in Italy Product number: 24370B Fits Models: YZ 85 2002 2023 YZ 85 Big wheel 2022 2023 SPECS: Compression RatioSTD Cylinder Diameter 47. 500 mm Displacement 85 cc Piston Diameter 47. 450mm Kit includes: Piston, rings, wrist pin, and circlips Vertex Piston Kits Exact fit A, B, or C pistons match your cylinder bore perfectly to maximize power and performance while reducing blow by and oil consumption 2 stroke pistons have an 18% silicon content