2020 YAMAHA Engines & Components

ProX Valve Shim Assortment 250cc 7.48 from 1.225 to 3.475

Part Number: PXR-29-VSA748-2

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Estimated Ship Date: May 27, 2026 if ordered today

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Piston and Ring Kit, Forged Aluminum, 55.000mm Bore, Yamaha, Kit

Part Number: WIS-PK1684

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Top End Engine Kit REPLACEMENT CYLINDER REPLACEMENT CYLINDER STANDARD BORE HEAD ONLY

Part Number: CLW-CH2001-K01

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Piston and Ring Kit, Forged Aluminum, 76.000mm Bore, Yamaha, Kit

Part Number: WIS-40078M07600

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Spring Kit, Titainium Retainers, Dual Springs, .450 in. Intake, .450 in. Exhaust, Yamaha, Kit

Part Number: KPM-80-80750

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ProX Valve Shim Assortment 450cc 9.48 from 1.20 to 3.50

Part Number: PXR-29-VSA948

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Estimated Ship Date: May 21, 2026 if ordered today

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ProX Valve Shim Assortment 450cc 9.48 from 1.225 to 3.475

Part Number: PXR-29-VSA948-2

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Estimated Ship Date: May 21, 2026 if ordered today

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ProX Piston Kit YZ250 '99-22 + RM250 '03-12 (66.35mm)

Part Number: PXR-01-2321-A

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Estimated Ship Date: May 21, 2026 if ordered today

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Connecting Rod, HOT ROD KIT YZ/WR250F / FX

Part Number: HRI-8717

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Estimated Ship Date: May 13, 2026 if ordered today

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Engine Piston, Yamaha YXZ1000R '16-19 9.5:1 Turbo

Part Number: WIS-40160M08000

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Estimated Ship Date: May 27, 2026 if ordered today

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Piston and Ring Kit, Forged Aluminum, 67.000mm Bore, Yamaha, Kit

Part Number: WIS-PK1199

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Estimated Ship Date: May 27, 2026 if ordered today

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Piston and Ring Kit, Forged Aluminum, 67.000mm Bore, Yamaha, Kit

Part Number: WIS-804M06700

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Estimated Ship Date: May 27, 2026 if ordered today

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Piston and Ring Kit, Forged Aluminum, 49.000mm Bore, Yamaha, Kit

Part Number: WIS-805M04950

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Estimated Ship Date: May 27, 2026 if ordered today

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Piston and Ring Kit, Forged Aluminum, 41.500mm Bore, Yamaha, Kit

Part Number: WIS-653M04150

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Estimated Ship Date: May 27, 2026 if ordered today

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VERTEX CAST REPLICA PISTON KIT

Part Number: VPX-23119A

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Estimated Ship Date: May 22, 2026 if ordered today

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Piston and Ring Kit, Replica, Forged Aluminum, 102.000mm Bore, 10.00 to 1 Compression, Yamaha, Kit

Part Number: VPX-23965B

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Estimated Ship Date: May 22, 2026 if ordered today

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Crankshaft Bearing CRANKSHAFT BEARING KIT CRANKSHAFT BEARING KIT

Part Number: ALB-24-1096

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Estimated Ship Date: May 14, 2026 if ordered today

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CONNECTING ROD KIT Yamaha

Part Number: HRI-8726

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Estimated Ship Date: May 14, 2026 if ordered today

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PISTON KIT 84.95/+0.50 YAM

Part Number: NTI-NA-40011-2

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Estimated Ship Date: May 27, 2026 if ordered today

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ProX Piston Kit YZ250 '99-22 + RM250 '03-12 (66.37mm)

Part Number: PXR-01-2321-C

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Estimated Ship Date: May 21, 2026 if ordered today

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Piston, TOP END REPAIR KIT

Part Number: NTI-NA-40013K

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Estimated Ship Date: May 22, 2026 if ordered today

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Repair Kit, Top End, 66.360mm Bore, 10.90 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NX-40025-BKA

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Estimated Ship Date: May 22, 2026 if ordered today

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Engine Piston, Yamaha YZ450F '18-19 12.8:1 CR

Part Number: WIS-40199M09700

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Estimated Ship Date: May 27, 2026 if ordered today

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VERTEX TOP END KITS 53.94

Part Number: VPX-VTK23119B

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Estimated Ship Date: May 22, 2026 if ordered today

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Piston and Ring Kit, Replica, Cast Aluminum, 56.000mm Bore, Yamaha, Kit

Part Number: VPX-23119200

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Estimated Ship Date: May 22, 2026 if ordered today

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