Top Performances Black Trophy 50cc 40mm Cylinder Kit – Minarelli Vertical AC

The Top Performances Black Trophy 50cc cylinder kit is a high-quality sport cylinder for Minarelli vertical air-cooled (AC) 2-stroke engines. With a 40mm bore and original stroke, it remains within the 50cc class while delivering noticeably improved performance over stock.

Manufactured from durable cast iron, the cylinder features 5 transfer ports and an oval exhaust port for optimized gas flow. Torque is clearly improved and top speed is slightly increased.

The Black Trophy is the successor to the well-known Trophy series and features an improved piston with special coating. Known for reliability and durability, making it ideal for everyday use.

With the right setup (e.g. 17.5mm carburetor and sport exhaust), power outputs of 5 to 7 hp are achievable.

Technical specifications:

• Brand: Top Performances
• Series: Black Trophy
• Article number: T9931170
• Displacement: 50cc
• Bore: 40 mm
• Material: Cast iron
• Cooling: Air cooled (AC)
• Wrist pin: 10 mm
• Transfer ports: 5
• Exhaust port: Oval
• Stroke: Original
• Connecting rod length: Standard
• Spark plug thread: M14 short
• Tuning level: Sport

Supplied including:

• 50cc cast iron cylinder
• One-piece high-compression aluminium cylinder head
• 2-ring piston complete (10mm pin)
• Gasket set