Harglo Performance has developed an air-cooled cylinder kit that is designed to convert the popular liquid-cooled KTM SX Pro Junior and Pro Senior models so that they comply with ACU & BSMA 50cc racing regulations. The automatic class of junior motocross is aimed at 6-8 year-olds and the rules stipulate that bikes must be air-cooled, but post 2001 models of the KTM Pro Junior and Pro Senior are liquid cooled, hence the demand for a conversion kit. For riders looking to upgrade the entry-level KTM Mini Adventurer, this kit may also be fitted, giving increased performance over the standard air-cooled cylinder.