The 870003 Blipper Up & Downshift (Ref.Rapidbike: K27-Blip-002A) is an Electro-assisted Gearbox Kit that can only be used with Rapidbike Evo or Racing ECU (Ref.Rapidbike: K27-Blip-002A) compatible with YAMAHA MT09 - MT09 ABS (RN291- RN296-RN435) 850 2014-2020