YAMAHA YZ250 Namura Engines & Components

TOP END REPAIR KIT

Part Number: NTI-NX-40025-BK

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Estimated Ship Date: May 18, 2026 if ordered today

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Repair Kit, Top End, 66.360mm Bore, 10.90 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NX-40025-BKA

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Estimated Ship Date: May 18, 2026 if ordered today

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Piston Rings, Powersports, Steel, Gas Nitrided Top, 66.40mm Bore, for use on Honda®, Suzuki, Yamaha, Kit

Part Number: NTI-NX-10025R

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Estimated Ship Date: May 18, 2026 if ordered today

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PISTON KIT CERAMIC COMP CYL 67.96/+0.02 10.6:1 YAM

Part Number: NTI-NX-40026-C

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Estimated Ship Date: May 18, 2026 if ordered today

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Repair Kit, Top End, 66.360mm Bore, 10.90 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NX-40025-CK

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Estimated Ship Date: May 18, 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-40025K

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Estimated Ship Date: May 18, 2026 if ordered today

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

Part Number: NTI-NX-40025-CKA

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Estimated Ship Date: May 18, 2026 if ordered today

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TOP END REPAIR KIT

Part Number: NTI-NX-40026-BKA

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Estimated Ship Date: May 18, 2026 if ordered today

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Repair Kit, Top End, 67.94mm Bore, 10.60 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NX-40026K

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Estimated Ship Date: May 18, 2026 if ordered today

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TOP END REPAIR KIT

Part Number: NTI-NX-40026-CKA

Not Yet Reviewed

Estimated Ship Date: May 18, 2026 if ordered today

• Drop Ship
• Special Order