CDI, for (but not limited to) 150cc to 400cc ATV's, dirt bikes / pit bikes and scooters. Manufacturer part number 5.3.01.0221. 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 since the early 2000's and applies to the 2x4, 4x4 and 4x4 IRS (Independent Rear Suspension) models. Also commonly used for Linhai 250cc and 260cc models as well as some other 250cc, 260cc and 300cc models - JCL Buyang and Xingyue 250cc, 260cc and 300cc ATVs as well as several scooters.