Engine Kits & Rotating Assemblies

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

Part Number: NTI-NA-40004-2K

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Estimated Ship Date: Nov 24, 2025 if ordered today

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Repair Kit, Top End, 99.970mm Bore, 9.20 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NA-40004K

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Estimated Ship Date: Nov 24, 2025 if ordered today

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Cylinder Head TOP END REPAIR KIT TOP END REPAIR KIT

Part Number: NTI-NA-50011-4K

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Estimated Ship Date: Nov 24, 2025 if ordered today

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TOP END REPAIR KIT

Part Number: NTI-NA-50070K

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Estimated Ship Date: Nov 24, 2025 if ordered today

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

Part Number: NTI-NX-10026K1

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Estimated Ship Date: Nov 24, 2025 if ordered today

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

Part Number: NTI-NX-10027K

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Estimated Ship Date: Nov 24, 2025 if ordered today

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Repair Kit, Top End, 66.350mm Bore, 8.60 to 1 Compression Ratio, Kawasaki, Kit

Part Number: NTI-NX-20025K

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Estimated Ship Date: Nov 24, 2025 if ordered today

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

Part Number: NTI-NX-20031K

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Estimated Ship Date: Nov 24, 2025 if ordered today

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

Part Number: NTI-NA-10003-6K

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Estimated Ship Date: Nov 24, 2025 if ordered today

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Repair Kit, Top End, 66.34mm Bore, 8.70 to 1 Compression Ratio, Suzuki, Kit

Part Number: NTI-NX-30027K

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Estimated Ship Date: Nov 24, 2025 if ordered today

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BORE KIT - 88CC

Part Number: BRM-411-HXR-7001

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Estimated Ship Date: Nov 24, 2025 if ordered today

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VERTEX PISTON KT HC FORGED

Part Number: VPX-24028A

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Estimated Ship Date: Nov 24, 2025 if ordered today

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VERTEX PISTON KIT

Part Number: VPX-24259050

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Estimated Ship Date: Nov 24, 2025 if ordered today

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VERTEX PISTON KIT

Part Number: VPX-24264B

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Estimated Ship Date: Nov 24, 2025 if ordered today

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TOP END REPAIR KIT

Part Number: NTI-NA-30002-16K

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TOP END REPAIR KIT

Part Number: NTI-NA-30051-BK

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Repair Kit, Top End, 83.950mm Bore, 9.50 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NA-40005-4K

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Piston, TOP END REPAIR KIT

Part Number: NTI-NA-40013-BK

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PISTON, A-SIZE, 2006-2010

Part Number: MOP-05191334AA

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Estimated Ship Date: Nov 17, 2025 if ordered today

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Racing Spring Kit, Titanium, 0.435" Lift, Honda®, CRF 250R/RX, 2018-2021

Part Number: KPM-30-33600

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Racing Spring Kit, Titanium, 0.450" Lift, Kawasaki®, KX 250's, 2020-2023

Part Number: KPM-40-41600

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Racing Spring Kit, HT Steel, 0.520" Lift, Indian®, Challengers (All), 2020-2023

Part Number: KPM-82-85000

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Racing Spring Kit, Titanium, 0.450" Lift, Polaris®, Various 570's, 2014-2023

Part Number: KPM-82-86000

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Racing Spring Kit, HT Steel, 0.450" Lift, Polaris®, Various 570's, 2014-2023

Part Number: KPM-82-86010

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LOWER ENGINE KIT

Part Number: MAH-LK778

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