The Stage6 Sport Pro 70cc aluminium cylinder has always been an affordable yet very high (European made) quality cylinder kit which has long been popular with in scooter tuning.
Now Stage6, with their new Sport Pro MKII, are taking it one step further! 
This MKII version of the Sport Pro is a completely new design and includes new transfer ports design which gives a 2 hp increase over the earlier kits.
With the right components this kit can make 15-17 hp straight out of the box.

Cosmetically this kit resembles the pentagonal shape of the R/T cylinders and the head is a one-piece construction with cast scavenging passages for better heat transfer. 
The piston used is a replica of the R/T version, with domed crown and 0.8mm ring to increase performance and improve thermal stability.

Use with BR9ES spark plug.

Stage6 S6-7414003

Instructions for all Stage6 MKII Sport Pro/ Race Cylinder Kits...

click here...

• all Piaggio/Gilera 50cc 2-stroke mopeds (air cooled)

• Q. which exhausts would be suitable for this kit and what revs should it be running at?
  A.

  http://www.pedparts.co.uk/c/asset/Stage6_Sport_Pro_MKII_Blog/Stage6_cylinder_kit.jpg

  http://www.pedparts.co.uk/c/asset/sports-pipe-blog/Stage6-MKII-Sport.png

  http://www.pedparts.co.uk/c/asset/Stage6_Sport_Pro_MKII_Blog/yasuni_exhausts.jpg