Scooterotica

This is the piston out of my son's GP200 motor. It lost power on the way to a rally but made it there and back slowly. He was flat out for about 45 miles on motorway before it happened. Set up is a stage 4 200 with a Taffy copy and a 28mm Delly. can't see any obvious reason for it happening but maybe some of the experts will be able to tell more from the photos. Barrel is barely marked.

john.t5 wrote:This is the piston out of my son's GP200 motor. It lost power on the way to a rally but made it there and back slowly. He was flat out for about 45 miles on motorway before it happened

and maybe added to this http://www.lambrettaspares.com/info/mb- ... s+116.html (go about halfway down to the 3 ring piston picture)