If you don't like what the engine is supplied with (I am guessing tygon anyway) you can buy your own at nearly every hobby shop:


http://www.horizonhobby.com/products/DUB505

or

http://www.horizonhobby.com/products...tubing-3SUL207

Also make sure that whatever method you use to supply your model fuel has the same type of tubing. I use these for gas:

http://www.jerseymodeler.com/

but you can make your own fueler on the cheap.