Yamaha Zuma Athena Performance Parts - 70cc Cylinder Kit 47.6mm 10mm piston pin for Minarelli vertical for 1988-2001 Yamaha Zuma, Yamaha BW 50
The latest 2021 Athena cylinder kit with 70cc and 47.6mm bore for 10mm gudgeon pin suitable for scooter with upright 2-stroke AC Minarelli engine like MBK Booster, Yamaha BW’s or Aprilia SR.
With this cylinder Athena has succeeded in a real revolution in the 2-stroke range for the air-cooled Minarelli engine. Due to the flange-mount directly on the crankcase, the stud bolts are eliminated, which is why the secondary outlets and a very large oval exhaust could be realised! The intake port has been redesigned and now has a CNC-milled fifth channel.
Through extensive analysis and testing on the cylinder and also because of years of experience in racing, the performance in terms of power and torque could be greatly improved and reached for the first time ever values in the range up to 19hp with a series produced 70cc 2-stroke AC cylinder for Minarelli engines!
The numerous innovative technical solutions (patent pending) introduced in this project make it possible to achieve performance never before achieved with this engine without porting.
Technical data:
Capacity: 69.8cc
Bore: 47.6mm
Piston pin: 10mm
Compression: 13.8:1
Included in delivery:
Cylinder
Cylinder head
Piston set
Needle bearing
Reed petals
Gasket set
Bolts and special hexagon socket spanner
THIS KIT FOR VERTICAL MINARELLI ENGINES ONLY.
In the USA the Minarelli Vertical is found in 1988-2001 Yamaha Zuma often called the Pre-Bug models and Yamaha CA / CW 50cc Scooters. Will work on Yamaha Riva CA 50 and Vertical Minarelli scooters sold in the USA such as Adly. Works on all Minarelli Vertical BWs sold in Canada and Caribbean.
The latest 2021 Athena cylinder kit with 70cc and 47.6mm bore for 10mm gudgeon pin suitable for scooter with upright 2-stroke AC Minarelli engine like MBK Booster, Yamaha BW’s or Aprilia SR.
With this cylinder Athena has succeeded in a real revolution in the 2-stroke range for the air-cooled Minarelli engine. Due to the flange-mount directly on the crankcase, the stud bolts are eliminated, which is why the secondary outlets and a very large oval exhaust could be realised! The intake port has been redesigned and now has a CNC-milled fifth channel.
Through extensive analysis and testing on the cylinder and also because of years of experience in racing, the performance in terms of power and torque could be greatly improved and reached for the first time ever values in the range up to 19hp with a series produced 70cc 2-stroke AC cylinder for Minarelli engines!
The numerous innovative technical solutions (patent pending) introduced in this project make it possible to achieve performance never before achieved with this engine without porting.
Technical data:
Included in delivery:
THIS KIT FOR VERTICAL MINARELLI ENGINES ONLY.
In the USA the Minarelli Vertical is found in 1988-2001 Yamaha Zuma often called the Pre-Bug models and Yamaha CA / CW 50cc Scooters. Will work on Yamaha Riva CA 50 and Vertical Minarelli scooters sold in the USA such as Adly. Works on all Minarelli Vertical BWs sold in Canada and Caribbean.
