Motorcycle Cylinder Piston Overhaul Pad Kit compatible with 4WD YFM400 models from 1993 to 1999.For ME&NH models only from 1993–1994.Cylinder bore size: 83 mm.Includes cylinder lower pad, cylinder upper pad, piston, piston rings, circlip, piston pin, and cylinder.Compatible with OEM part numbers: 4KB-11351-00-00 (cylinder lower pad), 1UY-11181-01-00 (cylinder upper pad), 4GB-11631-00-Y0 (piston), 4GB-11610-40-00 (ring), 93450-19095-00 (circlip), 51Y-11633-00-00 (piston pin), and 4GB-11310-00-00 (cylinder).Fits YFM400FWE, FWF, FWG, FWH, FWJ, FWK, FWBL (1993–1999); YFM400FWE_MNH (ME&NH only, 1993–1994). This component is produced by an independent manufacturer.Brand names are used for compatibility illustration.