Malossi C-One Minarelli Engine Case

Designed for competition, the Malossi C-One engine crankcase completely reimagines the engine architecture of the MBK Nitro and Yamaha Aerox. Its innovative structure accommodates the latest generation of racing components and opens the door to modifications impossible with a stock crankcase.

This crankcase is based on the Piaggio C-One: therefore, all internal parts must come from the liquid-cooled Piaggio ecosystem.

Key features

• Removal of the oil injection system and original mechanical water pump
• Possibility to mount a vacuum fuel pump
• Reinforced 16 x 22 x 12 mm transmission bearing
• Crankcase aligned and machined to receive an MHR Team cylinder
• Compatible with high-volume reed valve blocks (AM6 / Derbi type)
• Ideal base for developing or adapting unique cylinders

Important before purchase

This crankcase requires Piaggio components: transmission, variator, kickstart cover, crankshaft, cylinder, and ignition. Only the original Yamaha / MBK rear disc brake wheel can be retained.

Technical specifications

• Material: die-cast silicon aluminum alloy
• Weight: approximately 5.15 kg
• Crankshaft / clutch shaft center distance: 270 mm
• Stud spacing: 48 x 48 mm
• Crankshaft bearing: 20 x 47 x 14 mm
• Wheel axle bearing: 20 x 47 x 14 mm
• Transmission cover needle cage: 16 x 22 x 12 mm
• 360° intake manifold: Ø 35 mm, for VHST and PWK carburetors
• Reed valve block: VL18
• Cylinder base bore: 57.5 mm
• Crankshaft bore: 73 mm
• Studs: 8.8 grade steel, UNI EN 20898/1 standard

Compatibility

MBK Nitro and Yamaha Aerox (Minarelli horizontal engine).