Engine Kits & Rotating Assemblies

Repair Kit, Top End, 86.98mm Bore, 9.80 to 1 Compression Ratio, for use on Honda®, Kit

Part Number: NTI-NA-10042-2K

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Estimated Ship Date: Jan 22, 2026 if ordered today

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Repair Kit, Top End, 76.45mm Bore, 8.20 to 1 Compression Ratio, Kawasaki, Kit

Part Number: NTI-NA-20000-2K

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Estimated Ship Date: Jan 22, 2026 if ordered today

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Repair Kit, Top End, 89.97mm Bore, 11.30 to 1 Compression Ratio, Arctic Cat, Kawasaki, Suzuki, Kit

Part Number: NTI-NA-30002-BK

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Estimated Ship Date: Jan 16, 2026 if ordered today

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Cylinder Head TOP END REPAIR KIT TOP END REPAIR KIT

Part Number: NTI-NA-30015-CK

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Estimated Ship Date: Jan 16, 2026 if ordered today

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Repair Kit, Top End, 68.45mm Bore, 9.50 to 1 Compression Ratio, for use on Honda®, Kit

Part Number: NTI-NA-10027K

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Estimated Ship Date: Jan 23, 2026 if ordered today

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Cylinder Head TOP END REPAIR KIT TOP END REPAIR KIT

Part Number: NTI-NA-30014K

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Estimated Ship Date: Jan 23, 2026 if ordered today

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Repair Kit, Top End, 82.94mm Bore, 6.90 to 1 Compression Ratio, Polaris, Kit

Part Number: NTI-NA-50002K

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Estimated Ship Date: Jan 23, 2026 if ordered today

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Cylinder Head TOP END REPAIR KIT TOP END REPAIR KIT

Part Number: NTI-NA-50026K

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Estimated Ship Date: Jan 23, 2026 if ordered today

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Top End Engine Kits CYL WORKS STD BORE POWER VALVE CYL WORKS STD BORE POWER VALVE YZ250 '99-15

Part Number: CLW-CW-PV-K01

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Jan 23, 2026 if ordered today

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VERTEX TOP END PISTON KIT

Part Number: VPX-VTK22926B

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Estimated Ship Date: Jan 23, 2026 if ordered today

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Repair Kit, Top End, 68.95mm Bore, 9.50 to 1 Compression Ratio, for use on Honda®, Kit

Part Number: NTI-NA-10027-2K

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Estimated Ship Date: Jan 21, 2026 if ordered today

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Cylinder Head TOP END REPAIR KIT TOP END REPAIR KIT

Part Number: NTI-NA-10046K

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Estimated Ship Date: Jan 21, 2026 if ordered today

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Repair Kit, Top End, 84.950mm Bore, 10.00 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NA-40011-2K

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Estimated Ship Date: Jan 21, 2026 if ordered today

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Repair Kit, Top End, 84.44mm Bore, 6.90 to 1 Compression Ratio, Polaris, Kit

Part Number: NTI-NA-50002-6K

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Estimated Ship Date: Jan 21, 2026 if ordered today

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Repair Kit, Top End, 75.97mm Bore, 8.60 to 1 Compression Ratio, Polaris, Kit

Part Number: NTI-NA-50003-6K

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Estimated Ship Date: Jan 21, 2026 if ordered today

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Repair Kit, Top End, 92.47mm Bore, 10.20 to 1 Compression Ratio, Polaris, Kit

Part Number: NTI-NA-50004-2K

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Estimated Ship Date: Jan 21, 2026 if ordered today

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Piston, TOP END REPAIR KIT

Part Number: NTI-NA-50080K1

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Estimated Ship Date: Jan 21, 2026 if ordered today

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Repair Kit, Top End, 66.350mm Bore, 10.90 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NX-40025KA

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Estimated Ship Date: Jan 21, 2026 if ordered today

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TOP END GASKET KIT, TOP END REPAIR KIT (FORGED PISTON)

Part Number: NTI-FX-40033K

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Estimated Ship Date: Jan 21, 2026 if ordered today

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VERTEX PISTON KT HC FORGED

Part Number: VPX-23833A

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Estimated Ship Date: Jan 21, 2026 if ordered today

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VERTEX TOP END PISTON KIT

Part Number: VPX-VTK22860B

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Estimated Ship Date: Jan 21, 2026 if ordered today

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VERTEX TOP END PISTON KIT

Part Number: VPX-VTK22863B-1

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Estimated Ship Date: Jan 21, 2026 if ordered today

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VERTEX TOP END PISTON KIT

Part Number: VPX-VTK23630A-1

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Estimated Ship Date: Jan 21, 2026 if ordered today

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TOP END PISTON KIT

Part Number: VPX-VTK23928B-3

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Estimated Ship Date: Jan 21, 2026 if ordered today

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VERTEX TOP END PISTON KIT

Part Number: VPX-VTKTC23104

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Estimated Ship Date: Jan 21, 2026 if ordered today

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