Fuel bottles required for the challenge are plastic separatory funnels with cap and stopcock. The official size is 250ml. Each team is required to provide their own fuel tank so make sure to order early. (It is recommended that you have one or two extra fuel tanks on hand for backups. Although these funnels are made of plastic some versions seem to be brittle and can easily break off at the stopcock if dropped or mishandled. It seems very hard if not impossible to make repairs)
Long throttle cables can be hard to come by. This company offers long throttle cables at a reasonable price.
MICRO ENGINES & UNIQUE BICYCLE PARTS
This company stocks the small micro engines and unique bicycle parts such as the left hand wheel hub & gear reduction box.