Athena 50cc T5 40mm Cylinder – Minarelli Vertical – Yamaha BWS / Booster / Slider

The Athena 50cc T5 40mm cylinder is specifically designed for Minarelli vertical 50cc 2-stroke engines, as used in Yamaha BWS, Booster and Slider models.

With a 40 mm bore, it maintains the original 50cc displacement. Thanks to its 5 transfer ports, this cylinder offers improved gas flow and stable performance compared to a standard cylinder.

Manufactured from aluminium, it provides excellent heat dissipation and durability. Designed for air-cooled applications and equipped with a 10mm wrist pin.

Technical specifications:

• Brand: Athena
• Type: T5
• Displacement: 50cc
• Bore: 40 mm
• Cooling: Air cooled (AC)
• Material: Aluminium
• Wrist pin: 10 mm
• Transfer ports: 5
• Exhaust port: Butterfly type
• Engine: 2-stroke
• Tuning level: Sport / OEM+
• Manufacturer number: 070000/1
• GTIN: 8052204292462

Supplied including:

• 40mm aluminium cylinder
• Piston
• Piston rings
• 10mm wrist pin
• Piston clips

Fitment:

Minarelli vertical 50cc 2-stroke engines, including:

• Yamaha BWS
• Yamaha Booster
• Yamaha Slider
• MBK Booster
• Aprilia models with Minarelli vertical engine

Also known as Athena 50cc Minarelli vertical cylinder, Athena T5 Booster cylinder or 40mm Yamaha BWS aluminium cylinder.