2Fast Brand 86/90cc Piston Kits - 50mm
Malossi Piston Kit #3413034 will also work in this application
TECH: (Most Euro Kits)
50cc = 40mm Piston Bore x 39.2mm Stroke
70cc = 47.6mm Piston Bore x 39.2mm Stroke
86cc = 50mm Piston Bore x 44mm Stroke
90cc = 50mm Piston bore x 45.8mm Bore
94cc = 52mm Piston Bore x 44mm Stroke