Engine Kits & Rotating Assemblies Engines & Components - Free Shipping on Orders Over $109 at Summit Racing

Namura Technologies Top-End Repair Kits for 1998-2004 TRX450FE FOURTRAX FOREMAN ES, TRX450FM FOURTRAX FOREMAN S - NA-10000-3K

Repair Kit, Top End, 90.710mm Bore, 8.50 to 1 Compression Ratio, for use on Honda®, Kit

Part Number: NTI-NA-10000-3K

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 1998-2004 TRX450FE FOURTRAX FOREMAN ES, TRX450FM FOURTRAX FOREMAN S - NA-10000-6K

Repair Kit, Top End, 91.460mm Bore, 8.50 to 1 Compression Ratio, for use on Honda®, Kit

Part Number: NTI-NA-10000-6K

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 1995-2003 TRX400FW FOREMAN 4X4 - NA-10001-3K

TOP END REPAIR KIT

Part Number: NTI-NA-10001-3K

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 1995-2003 TRX400FW FOREMAN 4X4 - NA-10001K

Repair Kit, Top End, 85.970mm Bore, 8.20 to 1 Compression Ratio, for use on Honda®, Kit

Part Number: NTI-NA-10001K

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 1999-2008 TRX400EX SPORTRAX, 2009-2014 TRX400X, 1996-2004 XR400R - NA-10003-4K

Repair Kit, Top End, 85.970mm Bore, 11.00 to 1 Compression Ratio, for use on Honda®, Kit

Part Number: NTI-NA-10003-4K

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 1999-2008 TRX400EX SPORTRAX, 2009-2014 TRX400X, 1996-2004 XR400R - NA-10003-6K

Repair Kit, Top End, 86.470mm Bore, 11.00 to 1 Compression Ratio, for use on Honda®, Kit

Part Number: NTI-NA-10003-6K

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 1986 SRX600, 1984-1986 XT600, 1998-2001 YFM600FW GRIZZLY 4X4 - NA-40007-4K

TOP END REPAIR KIT

Part Number: NTI-NA-40007-4K

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 1986 SRX600, 1988-1995 XT600, 1998-2001 YFM600FW GRIZZLY 4X4 - NA-40007K

TOP END REPAIR KIT

Part Number: NTI-NA-40007K

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 2007-2008 YFM400 GRIZZLY 4X4 AUTO, 2000-2006 YFM400F KODIAK 4X4 - NA-40008-2K

Repair Kit, Top End, 84.920mm Bore, 9.10 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NA-40008-2K

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 2007-2008 YFM400 GRIZZLY 4X4 AUTO, 2000-2006 YFM400F KODIAK 4X4 - NA-40008K

Repair Kit, Top End, 84.420mm Bore, 9.10 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NA-40008K

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits NA-40010-2K

Repair Kit, Top End, 100.470mm Bore, 9.20 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NA-40010-2K

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits NA-40011-2K

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

Part Number: NTI-NA-40011-2K

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits NA-40011K

Repair Kit, Top End, 84.450mm Bore, 10.00 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NA-40011K

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits NA-40012K

Repair Kit, Top End, 101.970mm Bore, 9.40 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NA-40012K

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits NA-40013K

Piston, TOP END REPAIR KIT

Part Number: NTI-NA-40013K

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 2002-2004 CR250R - NX-10027K

Repair Kit, Top End, 66.340mm Bore, 8.50 to 1 Compression Ratio, for use on Honda®, Kit

Part Number: NTI-NX-10027K

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 1992-2003 KX250 - NX-20025-BK

Repair Kit, Top End, 66.360mm Bore, 8.60 to 1 Compression Ratio, Kawasaki, Kit

Part Number: NTI-NX-20025-BK

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 1992-2003 KX250 - NX-20025-CK

Repair Kit, Top End, 66.370mm Bore, 8.60 to 1 Compression Ratio, Kawasaki, Kit

Part Number: NTI-NX-20025-CK

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 2004-2005 KX250F, 2004-2006 RMZ250 - NX-20030-BK

TOP END REPAIR KIT

Part Number: NTI-NX-20030-BK

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 2004-2005 KX250F, 2004-2006 RM250 - NX-20030K

Repair Kit, Top End, 76.950mm Bore, 12.60 to 1 Compression Ratio, Kawasaki, Suzuki, Kit

Part Number: NTI-NX-20030K

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 2009 KX250F - NX-20031-BK1

Cylinder Head TOP END REPAIR KIT TOP END REPAIR KIT

Part Number: NTI-NX-20031-BK1

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 2006-2008 KX250F - NX-20031K

Repair Kit, Top End, 76.950mm Bore, 13.50 to 1 Compression Ratio, Kawasaki, Kit

Part Number: NTI-NX-20031K

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

Hot Rods Complete Bottom End Rebuild Kits CBK0045

Rebuild Kit, Complete Bottom End, for use on Honda®, Kit

Part Number: HRI-CBK0045

Not Yet Reviewed

Estimated Ship Date: Feb 12, 2026 if ordered today

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Estimated Ship Date: Feb 12, 2026 if ordered today

BBR Motorsports Powersports Top End Engine Kits 411-HCF-1911

PISTON KIT - 195CC BORE KIT

Part Number: BRM-411-HCF-1911

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

BBR Motorsports Powersports Top End Engine Kits 411-HXR-5411

88CC BIG BORE PISTON KIT

Part Number: BRM-411-HXR-5411

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today