Our drop-in 70mm cylinder is custom machined and has a reduced sleeve outer diameter so that it fits without requiring case boring.  Increases TW200 from 196cc to 215cc.  Your choice of standard 9.5:1 compression cast OEM style piston or bradley custom 10:1 high compression piston.  Includes gaskets.  Requires the use of the 2001 and up cam chain tensioner.   Will require carburetor jetting alterations so the jet kit is available separately.  A free-flow exhaust is highly recommended.