I don't ride anymore but when I did I put a lot of work into my bike to make it unique. Although I had further plans for it I had to sell it after I broke my collar bone doing a wheelie up at Mt. Seymour. It was fun while it lasted, but I'll be back again one day. This is a small video showing the flamethrower that I had installed by a local bike mechanic. I don't think this is street legal so I won't share who installed it for me but he was one of the few guys crazy (and skilled) enough to do it. This video was made during the day, but the flames appear much better and bigger at night, especially if you hold the throttle for a little longer.
There was a small push button installed on the left handlebar, and when I pushed it it would kill the engine. So basically, if I revved the throttle and pushed the button, the exhaust fumes would ignite using a current that was stored in the huge capacitor above my exhaust (connected via the yellow wire).