This ignition key switch fits many 150cc to 400cc machines. Includes 2 keys. Works on ATVs, Dirt Bikes, Scooters, and more. Manufacturer part number 5.3.01.0011, also at times referred to (though more rarely) as 5.3.01.0013. Applies primarily to (but not limited to) Buyang 300cc 4x4 ATV, Gio Bear 300cc, Daymak Grunt 300cc, Midwest 300cc, ZMC Titan 300cc, Chironex 300cc Bandito, Asun 300cc Bandito and may apply to other similar variations of 300cc 4x4 ATVs from companies like Linhai, Liangzi, Kangdi and many more. This machine has been produced for 8 years and applies to the 2x4, 4x4 and 4x4 IRS (Independent Rear Suspension) models.