Description
Stage6 cylinder kit Sport Pro MK 2 70cc
Stage6 Cylinder Kit 70cc Sport MK2 10mm piston pin Minarelli vertical (Yamaha BW’s / Slider – MBK Booster / Stunt). The first generation Sport MK1 cylinders became very popular among scooter tuners, then Stage6 took things to the next level and introduced the successor, the Sport MKII.
For 50cc scooters with Minarelli vertical engine such as MBK Booster / Stunt or Yamaha BW’s / Slider.
Design Stage6 MK2 cylinder
The cylinder was completely redesigned; 6 instead of 5 transfer ports ensure optimized cylinder filling. The oval exhaust remained but was optimized as well. The appearance is based on the pentagonal shape of the R/T cylinders. The head is a one-piece unit with cast scavenging canals for better heat dissipation. The piston is a replica of the R/T piston, with a domed piston crown and 0.8 mm thick piston ring to optimise performance and improve thermal stability.
Performance 70cc cylinder MK2 from Stage6
The cylinder delivers 2 to 3 hp more power than the MK1, between 12 hp, without any additional modifications and in combination with the corresponding components. Maximum performance and outstanding robustness – we are sure that this cylinder will set new standards in the tuning scene.
We recommend using a reinforced crankshaft, a min. 19mm carburetor and a sport / racing exhaust to exploit the full power of this tuning cylinder.
Installation tips for Stage6 cylinders
We recommend to clean the engine before assembly, check the condition of all components and use a new spark plug and new small end bearing. Do not forget to change your carburetor settings if necessary.
Squish clearance should be between 0.75 and 0.85. The cylinder should be run in for approx. 300 km with a 1:33 mixture to improve robustness and life expectancy.
Attention: Original exhausts cannot be mounted with this cylinder.
WITHOUT HOMOLOGATION (in some countries)
Scope of delivery Stage6 cylinder MK2
- Aluminium cylinder, 47.6mm bore
- 1-ring piston with 10mm piston pin
- One-piece cylinder head
- Gasket set
