ATHENA 47.6MM AIR COOLED HORIZONTAL MINARELLI / YAMAHA JOG BIG BORE CYLINDER AND HEAD KIT. KIT INCLUDES CYLINDER, CYLINDER HEAD, PISTON, RING, PISTON PIN, CIR CLIPS, HEAD GASKET, BASE GASKET, EXHAUST GASKET AND CARBON FIBER REEDS.
WHEN YOU USE THIS ATHENA 47.6MM
BIG BORE KIT YOU WILL INCREASE
YOUR TOTAL DISPLACEMENT TO 70CC!
FITS YAMAHA ZUMA 2 STROKE FROM YEARS
2002-2011 AND JOG CY50 FROM 1992-2001.
*YOU MAY NEED TO MODIFY YOUR ENGINE CASE TO ACCOMMODATE THE LARGER CYLINDER.
UPGRADES TO 70CC
ALUMINUM CONSTRUCTION WITH NICKEL CARBIDE PLATED BORE
CYLINDER BORE: 47.6MM
CYLINDER SLEEVE OUTER DIAMETER: 50.5MM
WRIST PIN DIAMETER: 10MM
TOTAL PISTON HEIGHT: 47.5MM
COMPRESSION HEIGHT (FROM CENTER OF WRIST PIN HOLE TO TOP EDGE OF PISTON): 26MM