Color Legend:

• Red: Canceled part - unavailable for any operations.
• Blue: Part of a kit - cannot be ordered individually.
• Gray (Dimmed): Disabled part - non-interactive for various reasons.
• Part Number : Superseded part - replaced by a newer part.

Description: - The MT15 Crankcase assembly is the core of your engines integrity, housing the rotating assembly in a precision-engineered environment. This kit includes the high-strength Crankcase 1 and Crankcase 2 halves, precision-aligned with a series of Pin Dowel units. To ensure a leak-proof structural bond, we provide high-tensile Bolt Flange hardware for the entire casing. This assembly is designed to withstand the intense thermal and mechanical stresses of high-revving performance, offering the technical clarity that defines Yamaha’s racing heritage. By choosing genuine crankcase components, you ensure perfect bearing alignment and oil flow management. For the rider performing a complete engine build or major repair, this kit provides the purchase confidence required for long-term reliability. As a storyteller, you know the foundation defines the journey; build yours on the strongest base possible with these factory-original crankcase components. Invest in the longevity of your 155cc engine with genuine parts designed for the highest performance standards of the Yamaha brand.