Top Performances 86cc Big Bore Kit 50mm – Minarelli AM6 – Aluminium (44mm Stroke)

The Top Performances 86cc Big Bore kit is a complete Maxi Kit for Minarelli AM6 50cc 2-stroke engines. Designed for maximum performance, this kit includes a 44mm long-stroke crankshaft.

With a 50 mm bore and 44 mm stroke, displacement increases to approximately 86cc, delivering significantly more power and torque compared to standard or 70cc setups.

The aluminium cylinder ensures excellent heat dissipation and high performance at elevated rpm. It features 5 transfer ports and a butterfly exhaust port for optimal gas flow.

Technical specifications:

• Brand: Top Performances
• Type: Big Bore / Maxi Kit
• Displacement: 86cc
• Bore: 50 mm
• Stroke: 44 mm
• Cooling: Liquid cooled (LC)
• Material: Aluminium
• Wrist pin: 12 mm
• Transfer ports: 5
• Exhaust port: Butterfly type
• Engine: 2-stroke
• Engine type: Minarelli AM6
• Tuning level: Racing

Supplied including:

• 50mm aluminium cylinder
• Piston
• Piston ring
• 12mm wrist pin
• Piston clips
• 44mm long-stroke crankshaft
• Crankshaft bearings
• Installation components

Note: 86cc racing kit – not road legal. Upgrades to carburetion, exhaust and ignition are required for optimal performance.

Spare parts:

50mm gasket set:

Top Performances 50mm AM6 Gasket Set

50mm piston size A:

Top Performances 50mm AM6 Piston A

50mm piston size B:

Top Performances 50mm AM6 Piston B

50mm piston ring:

TPR 50mm Minarelli AM6 Piston Ring

Also known as Top Performances 86cc AM6 Big Bore, TP 50mm 44mm stroke AM6 kit or Top Performance Maxi Kit Minarelli AM6.