This is a Stator / Magneto Coil which applies to (and is not limited to) 50cc 70cc 90cc 110cc 125cc, 140cc and 150cc manual shift and automatic ATV and Dirt Bike engines. Most commonly used for 125cc kick start dirt bikes. This is a 2 coil stator with a circular back-plate. Approximate dimensions: Outside Diameter: 115mm. Centre Hole Diameter: 18.7mm. Mounting Hole (centre-centre): 102mm. Bolt Hole: 6.5mm. Harness Length: 27cm