Popping like a CG

Alpha-9 · Super Spammer Joined: 19 Jan 2012 Karma :

Noticed engine braking down from a specific rev range my bike makes some popping sounds, reminds me of my bros CG when you let it down from the top end of the revs it sort of farts and pops

Is bad?
Worried it might be valves or something Surprised

Didn't seem to do it at first (or at least I never noticed) seems to be a new thing...

I quite like it but it's probably bad Laughing

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Fzr-600 1999

Benson_JV · World Chat Champion Joined: 04 May 2010 Karma :

It's just backfiring, I love a nice fruity crackly pipe. Thumbs Up

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Willson - "If you go out on that CBR600 in the winter, you're going to do more miles on your side than on your wheels."
Riding: CBR600FW Driving: Audi A6
Previous Bikes: '96 Bandit 600, '96 GPz305

Aff · World Chat Champion Joined: 05 May 2011 Karma :

Aftermarket exhaust?

As long as it doesn't do it while you're accelerating it's fine.
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Current Bikes:Honda 929RR Fireblade, Honda CD200 Benly (Project), Stomp Z2 140
Electric Bike Project

..... · Quote Me Happy Joined: 15 Jan 2005 Karma :

Header nuts done up tight?

Alpha-9 · Super Spammer Joined: 19 Jan 2012 Karma :

Aff · World Chat Champion Joined: 05 May 2011 Karma :

Unburnt fuel igniting in the exhaust.

Cruising with the killswitch on draws fuel through the engine, but with no spark it just passes into the exhaust, when you flick the killswitch back the engine fires again and the hot exhaust gasses ignite all the unburnt fuel in the exhaust.
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Current Bikes:Honda 929RR Fireblade, Honda CD200 Benly (Project), Stomp Z2 140
Electric Bike Project

..... · Quote Me Happy Joined: 15 Jan 2005 Karma :

A popping exhaust can be caused by running lean as well.