This Tovami Jet Kit is specifically made for the motorcycle mentioned in the title. You selected the stage that is mentioned in the title. The quality of Tovami is of a high standard and is very easy to work with. You can mount the kit yourself, however we would also advise the help of a professional (with a Dyno) to get the best result. The kit should fit your OEM carburettor(s). Do note that the picture(s) displayed are only indicative.The set delivered will be very complete! This following kit is the Jet Kit RF-4104 for Yamaha BT 1100 Stage 1