Item fits Yamaha models: YZ125 1997~2000 Item includes: ø54mm Cylinder x 1 Cylinder Head x 1 Head Stud x 5 Power Valve L/R x 1 Complete Top & Bottom End Engine Gasket Set x 1 Replace OE P/N: Cylinder: 4SS-11311-10-00, 4SS-11311-30-00, 5ET-11311-00-00, 5ET-11311-11-00, 5HD-11311-00-00, 5HD-11311-11-00 Cylinder Head: 5MV-11111-00-00, 5UN-11111-00-00 Head Stud: 90116-08394-00 Power Valve: 5HD-1131D-00-00, 5HD-1132D-00-00 Feature: ★ Nikasil Plating Cylinder for bettering heat dissipation and low friction ★ Cylinder is machined and plating in Taiwan ★ Cylinder Head is machined in Taiwan ★ Tighter tolerances for better Engine Performance ★ Better Heat Conductivity and low wear low friction ★ Much Durable
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