Engine Rotating Assemblies & Rebuild Kits

Namura Technologies Top-End Repair Kits for 1990-1993 TRAIL BOSS 350L 4X4, TRAIL BOSS 350L 2X4, 1993 BIG BOSS 350L 6X6 - NA-50001-2K

TOP END REPAIR KIT

Part Number: NTI-NA-50001-2K

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Technologies Top-End Repair Kits for 1990-1993 TRAIL BOSS 350L 4X4, TRAIL BOSS 350L 2X4, 1993 BIG BOSS 350L 6X6 - NA-50001-6K

Repair Kit, Top End, 81.45mm Bore, 6.00 to 1 Compression Ratio, Polaris, Kit

Part Number: NTI-NA-50001-6K

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Technologies Top-End Repair Kits for 1990-1993 TRAIL BOSS 350L 4X4, TRAIL BOSS 350L 2X4, 1993 BIG BOSS 350L 6X6 - NA-50001K

TOP END REPAIR KIT

Part Number: NTI-NA-50001K

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Technologies Top-End Repair Kits NA-50002-2K

Repair Kit, Top End, 83.44mm Bore, 6.90 to 1 Compression Ratio, Polaris, Kit

Part Number: NTI-NA-50002-2K

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Technologies Top-End Repair Kits NA-50004-4K

Repair Kit, Top End, 92.97mm Bore, 10.20 to 1 Compression Ratio, Polaris, Kit

Part Number: NTI-NA-50004-4K

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Powersports Top End Engine Kits NA-50011-4K

Cylinder Head TOP END REPAIR KIT TOP END REPAIR KIT

Part Number: NTI-NA-50011-4K

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Powersports Top End Engine Kits NA-50012-4K

Cylinder Head TOP END REPAIR KIT TOP END REPAIR KIT

Part Number: NTI-NA-50012-4K

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Powersports Top End Engine Kits NA-50012K

Cylinder Head TOP END REPAIR KIT TOP END REPAIR KIT

Part Number: NTI-NA-50012K

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Powersports Top End Engine Kits NA-50019-6K

Cylinder Head TOP END REPAIR KIT TOP END REPAIR KIT

Part Number: NTI-NA-50019-6K

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Technologies Top-End Repair Kits NA-50070K

TOP END REPAIR KIT

Part Number: NTI-NA-50070K

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Technologies Top-End Repair Kits NA-50070K1

Repair Kit, Top End, 79.960mm Bore, 10.20 to 1 Compression Ratio, Polaris, Kit

Part Number: NTI-NA-50070K1

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Powersports Top End Engine Kits NA-50080K1

Piston, TOP END REPAIR KIT

Part Number: NTI-NA-50080K1

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Powersports Top End Engine Kits NA-50081-BK

Piston, TOP END REPAIR KIT

Part Number: NTI-NA-50081-BK

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Powersports Top End Engine Kits NA-50090-BK

Piston, TOP END REPAIR KIT

Part Number: NTI-NA-50090-BK

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Powersports Top End Engine Kits NA-50091K

Piston, TOP END REPAIR KIT

Part Number: NTI-NA-50091K

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Powersports Top End Engine Kits NX-30080-2K

TOP END REPAIR KIT

Part Number: NTI-NX-30080-2K

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Powersports Top End Engine Kits NX-30080-6K

TOP END REPAIR KIT

Part Number: NTI-NX-30080-6K

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Technologies Top-End Repair Kits for 1998-2000 YZ125 - NX-40000-CK

Repair Kit, Top End, 53.960mm Bore, 8.90 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NX-40000-CK

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Technologies Top-End Repair Kits for 2002-2004 YZ125 - NX-40001-BK

Repair Kit, Top End, 53.950mm Bore, 10.80 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NX-40001-BK

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Technologies Top-End Repair Kits for 1986-1990 BW80, 1983-2006 PW80 - NX-40008-2K

Repair Kit, Top End, 47.500mm Bore, 6.60 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NX-40008-2K

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Powersports Top End Engine Kits NX-40008-4K

TOP END REPAIR KIT

Part Number: NTI-NX-40008-4K

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Powersports Top End Engine Kits NX-40025-BK

TOP END REPAIR KIT

Part Number: NTI-NX-40025-BK

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Technologies Top-End Repair Kits for 2002-2022 YZ250, 2022 YZ250 MONSTER ENERGY YAMAHA RACING EDITION, 2017-2022 YZ250X - NX-40025-CKA

Repair Kit, Top End, 66.370mm Bore, 10.90 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NX-40025-CKA

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Technologies Top-End Repair Kits for 1999-2001 YZ250 - NX-40025K

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

Part Number: NTI-NX-40025K

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today

Namura Technologies Top-End Repair Kits for 2002-2022 YZ250, 2022 YZ250 MONSTER ENERGY YAMAHA RACING EDITION, 2017-2022 YZ250X - NX-40025KA

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

Part Number: NTI-NX-40025KA

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2025 if ordered today

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Estimated Ship Date: Jul 28, 2025 if ordered today