Ya the kits they make for gassers actually cut of the spark to the motor for a bit. You have to rev them up so there spinning fast and pumping lots of gas then you flip a switch which cuts off the ignition and lights the spark plug in the exhaust pipe, then flip the switch back quick enough that the motor dosen't die. I don't know about making it burn diesel though.

 

i have put a torch to my tail pipe and made it smoke pretty bad but the torch whould always blow out and no flame

 

had that flamethrower kit on a suburban, added propane by the exhaust tip to make it a bigger flame, switch hooked up to the coil, then to a sparkplug...while just running a smarty and 7x.012's, this summer i had done a burnout for 40-50 seconds, and when i had turned around i was blipping the throttle, and my buddy told me that my passenger side stack had blew a flame...being so hot and blipping the throttle would have sucked in enough oxygen to ignite...**** kid shut the camera off 3 seconds to early!!

 

yeah, a small disposable "lantern fuel" bottle works GREAT for flame throwing exhaust. Just wire in a coil and sparkplug, or a BBQ igniter.

 

It was "blackdiesel" and he just stuck oily corn cobs on fire on sticks down his stacks.

 

Im planning on re-routing my exhaust through side of the bed, down low, right in front of the right rear wheel. I think that would be awesome if I could get it to throw some fire...

My buddy has a Suzuki SV1000S and I have a CBR1000RR. We took our mufflers off and when we would be on hard and then speed shift, we could shoot foot long blue flames out of the pipes. Its incredibly awesome at night, tearing down the road in the dark and every time you get it, a bright flash of blue.