
The VERTEX Replica forged piston (manufacturer reference 22567B) is a part designed for motocross and off-road use. Machined from aluminum, it features a B oversize and precise dimensions to replace or prepare for an oversized bore: bore 92.00 mm for a piston diameter of Ø 91.94 mm.
Main compatibilities: YAMAHA WR 400 F (CH04) 2000, YAMAHA YZ 400 F (CH03) 1999, and YAMAHA YZ 400 F (CH01) 1998. Always check the bore size and the oversize letter indicated on the cylinder head before installation.
Installation tips: check the condition of the cylinder, the bore, and the piston/ring clearance, replace the rings, and adhere to manufacturer tolerances during honing or re-boring. The forged piston requires special attention during break-in and ring sealing to ensure optimal performance under cross conditions.
VERTEX 22567B — forged piston for Cross applications, B size, Ø 91.94 mm.