Bore: 54mm, Stroke: 54.5mm, Disp: 125cc. Standard Oversize.

• Endurance and high rpm
• Each piston is electra-coated on the dome, ring groove, and pin bore, for maximum wear resistance and protection from micro-welding, galling and detonation
• GP Series parts generally have less machining on the outside, which helps seal up the bore for increased compression
• Engineered, forged, and machined in the USA
• Kit includes piston, ring(s), wrist pin and circlips
• ArmorGlide® skirt coating reduces friction and noise for more horsepower potential