mary 2009-04-13 1997 year built, 2 stroke, 3 speed moped zid 50 ''Pilot''. Max speed 60 kph. I bought new yamaha jog carbuerator & new piston from jog too. At nearest time, I'm sending cylinder to bore at 60 ccm. At this video piston and cylinder are not in good shape, rings are erased, compression is low.
