Here is the multi-coil ignition flywheel for Pit Bike, Dirt Bike and Minicross. This is the original original equipment part for YX, Ducar, Lifan, Loncin, Zongshen, Tokawa 4-stroke engines. DIMENSIONS: Total height = 44 mm Total diameter = 112.5 mm Internal diameter = 86 mm COMPATIBILITY: Fit for Dirt bike/Quad/DAX, 50cc, 70cc, 90cc, 110cc, 125cc, 138cc, 140cc,150cc, 160cc engines