70cc Cylinder Kit 46mm – Honda NSR / MBX Liquid Cooled

This 70cc 46mm cylinder kit is designed for Honda NSR and Honda MBX 50cc liquid-cooled 2-stroke engines. The 46 mm bore increases displacement to approximately 70cc, delivering improved torque, stronger acceleration and higher top speed compared to the original 50cc cylinder.

The cylinder is made from durable cast iron, ensuring long service life and reliability. Ideal as a sporty upgrade or replacement during engine rebuilds.

Technical specifications:

• Displacement: 70cc
• Bore: 46 mm
• Material: Cast iron
• Cooling: Liquid cooled (LC)
• Engine type: 2-stroke
• Engine: Honda NSR / MBX 50cc
• Tuning level: Sport

Fits:
All Honda NSR and MBX 50cc liquid-cooled crankcases.

Scope of delivery:

• 70cc cast iron cylinder 46mm
• 46mm piston
• Piston rings
• Piston pin
• Piston clips
• Gaskets

Recommended:
For a complete rebuild, we recommend ordering the separate gasket set:
Honda NSR 70cc head gasket set

Note: This 70cc tuning cylinder is not homologated for public road use. Proper carburetor and exhaust setup is recommended.

Also known as Honda NSR 70cc cylinder, Honda MBX 46mm cylinder or NSR 70cc liquid cooled cylinder kit.