Engine Kits & Rotating Assemblies

Repair Kit, Top End, 101.980mm Bore, 9.40 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NA-40012-BK

Not Yet Reviewed

Estimated Ship Date: Sep 25, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Repair Kit, Top End, 92.96mm Bore, 8.50 to 1 Compression Ratio, for use on Honda®, Kit

Part Number: NTI-NA-10008-4K1

Not Yet Reviewed

Estimated Ship Date: Sep 25, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

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

Part Number: NTI-NA-30002-BK

Not Yet Reviewed

Estimated Ship Date: Sep 25, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Repair Kit, Top End, 82.46mm Bore, 9.00 to 1 Compression Ratio, Arctic Cat, Suzuki, Kit

Part Number: NTI-NA-30010-2K

Not Yet Reviewed

Estimated Ship Date: Sep 25, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

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: Sep 25, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

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: Sep 25, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

TOP END REPAIR KIT

Part Number: NTI-NA-40007-4K

Not Yet Reviewed

Estimated Ship Date: Sep 25, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Repair Kit, Top End, 85.470mm Bore, 11.00 to 1 Compression Ratio, for use on Honda®, Kit

Part Number: NTI-NA-10003-2K

Not Yet Reviewed

Estimated Ship Date: Sep 25, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

TOP END REPAIR KIT

Part Number: NTI-NA-40007K

Not Yet Reviewed

Estimated Ship Date: Sep 25, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Repair Kit, Top End, 94.960mm Bore, 11.40 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NA-40009-BK

Not Yet Reviewed

Estimated Ship Date: Sep 25, 2025 if ordered today

• Free Shipping
• Special Order

Repair Kit, Top End, 90.460mm Bore, 8.50 to 1 Compression Ratio, for use on Honda®, Kit

Part Number: NTI-NA-10000-2K

Not Yet Reviewed

Estimated Ship Date: Sep 25, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

VERTEX TOP END PISTON KIT

Part Number: VPX-VTKTC23104

Not Yet Reviewed

Estimated Ship Date: Sep 25, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

TOP END KIT FR WITH CAM CHAIN

Part Number: VPX-VTKTC23311B

Not Yet Reviewed

Estimated Ship Date: Sep 25, 2025 if ordered today

• Drop Ship
• Oversize $6.99
• Special Order

TOP END GASKET KIT, TOP END REPAIR KIT

Part Number: NTI-FX-10045K

Not Yet Reviewed

Estimated Ship Date: Sep 25, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

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

Part Number: NTI-FX-10045-BK

Not Yet Reviewed

Estimated Ship Date: Sep 25, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

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: Sep 26, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

PISTON KIT - 195CC BORE KIT

Part Number: BRM-411-HCF-1911

Not Yet Reviewed

Estimated Ship Date: Sep 26, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

88CC BIG BORE PISTON KIT

Part Number: BRM-411-HXR-5411

Not Yet Reviewed

Estimated Ship Date: Sep 26, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

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

Part Number: HRI-CBK0045

Not Yet Reviewed

Estimated Ship Date: Sep 17, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

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

Part Number: NTI-NA-20000-2K

Not Yet Reviewed

Estimated Ship Date: Sep 26, 2025 if ordered today

• Drop Ship
• Special Order

Repair Kit, Top End, 76.95mm Bore, 8.20 to 1 Compression Ratio, Kawasaki, Kit

Part Number: NTI-NA-20000-4K

Not Yet Reviewed

Estimated Ship Date: Sep 26, 2025 if ordered today

• Drop Ship
• Special Order

Cylinder Head NAMURA TOP END REPAIR KIT NAMURA TOP END REPAIR KIT

Part Number: NTI-NA-20005-4K1

Not Yet Reviewed

Estimated Ship Date: Sep 26, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

TOP END REPAIR KIT

Part Number: NTI-NA-20036-4K

Not Yet Reviewed

Estimated Ship Date: Sep 26, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

TOP END REPAIR KIT

Part Number: NTI-NA-20036K

Not Yet Reviewed

Estimated Ship Date: Sep 26, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Piston, TOP END REPAIR KIT

Part Number: NTI-NA-20062K

Not Yet Reviewed

Estimated Ship Date: Sep 26, 2025 if ordered today

• Drop Ship
• Free Shipping
• Special Order