Some do ,I have a Mugen 6x ,Cap 803 and 804.They all use a 20 tooth brake pully and 18 tooth side belt and inside mid block pully.They dont always fit the pully adapter from brand to brand6x ,803,804 use 201 rear belt,435 side belt.Front belt 210 is different on the 6x .Hope this info helps.ARC is similar