Backfire! What is it exactly?

[Geeen]

"What is a backfire exactly?"

As far as I know...Unburnt mixture in the exhaust system igniting.

We used to deliberately induce backfire in cars by turning off the ignition, coasting along, in gear with throttle held wide open. Then turn ignition back on. Boom. Sometimes anyway...

My Old Man did that on Ponsonby Rd in a Commer Van back in the day, blew the exhaust clean off......

[slofox]

My Old Man did that on Ponsonby Rd in a Commer Van back in the day, blew the exhaust clean off......

Yerrrr....that was a bit of a risk. Which is maybe why my old man went apeshit when he found out we'd been doing it to his ute...

[oracle]

Funny, I've never even thought a bike backfiring before then read this thread, go to pick up my new (to me) bike (that I had checked out beforehand with a KB mentor), go to start it and the thing backfires. Almost crapped my pants!

Then the back cyclinder wasn't firing (which the great guys at cyclespot where it had just got a warrant from got it firing again). Hopefully a one off and linked to it sitting for 6 months or so outside and not an ongoing problem. Going to take it in for a professional service for this reason in a couple weeks

[Chalmes]

In my last Nissan Skyline I had a Link computer fitted, which would allow me to tune it. Fun times were to be had by ramping up the master fuel setting so it was running horribly rich, pulling up to the lights, rev the engine a few times to load the exhaust with fuel and then a good solid rev to produce 5 ft fireballs...

Good times

Jon