Airsal / Eurokit 70cc 45mm Cylinder Kit – Yamaha DT50 MX / R / M (AC) – 12mm Pin

The Airsal / Eurokit 70cc 45mm cylinder kit is a performance upgrade for Yamaha DT50 R, DT50 M and DT50 MX air-cooled (AC) models produced between 1981 and 1996.

With a 45 mm bore, the displacement increases to approximately 70cc, providing noticeably more torque and improved acceleration compared to the original 50cc cylinder.

The aluminium construction ensures excellent heat dissipation and stable performance at higher rpm. Equipped with a 12 mm wrist pin and suitable for use with the original crankshaft.

Technical specifications:

• Brand: Airsal / Eurokit
• Displacement: 70cc
• Bore: 45 mm
• Wrist pin: 12 mm
• Cooling: Air cooled (AC)
• Material: Aluminium
• Engine: 2-stroke
• Tuning level: Sport
• Application: Yamaha DT old models (1981–1996)

Supplied including:

• 45mm aluminium cylinder
• Piston
• Piston ring
• Wrist pin
• 2x Piston clips

Spare parts:

45mm piston:

Airsal Yamaha DT 45mm Piston

Also known as Airsal 70cc Yamaha DT cylinder, Eurokit DT50 MX 45mm cylinder or Yamaha DT 70cc aluminium upgrade 12mm pin.