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Discussion Starter #1
Today at work I was taking out the trash and I heard a sportbike looked like a honda cbr, well anyways the guy opened up the throttle and the bike just roared and just sped off, but after a few seconds I heard a loud pop. Whats that pop from, was it something bad. Kinda sounded like he did something bad to the engine?
 

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He probably banged the rev limiter when he shifted, and unburnt gas lit off in the exhaust. Not a big deal.
 

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Sport Tourer
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Most hondas I've heard (VF700F, CBR600F Hurricane, ST1100) tend to backfire more than the other bikes (Suzuki Burgman, Suzi Katana 600, Kawi EX250 and 500, ZX600) I've heard. Maybe it has to do with the way their carburetion is set up or something. Both my Interceptor and my roommate's ST tend to backfire (not much, just very minor rumbling pop noises that aren't TOO noticable) on engine braking.
 

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No limit hypocrite
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I had a Two Bros Full Exhaust on my F2, and it would Pop everytime I engine braked.. Sounded sweet.
 

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pmoney said:
aka it back fired
Incorrect, it was afterfire. Backfires are badddddd, when combustion occurs in the intake manifold or prior, aka the engine fires 'back', opposite of the way it should be. Afterfire is when the unburnt fuel ignites in the exhaust, making a pop and often (on catless vehicles) a burst of flame out the tailpipe(s). Afterfire is harmless, though may or may not be evidence of incorrect tuning.

Please keep in mind the distinction between these two terms.
 

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My hurricane loves to snap crackle and pop when engine braking.
 

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Old school fool
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sictight311 said:
My hurricane loves to snap crackle and pop when engine braking.
Hmm, I like the sound of that. Maybe they could base some kind of breakfast cereal on it.... :)
 

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IMPerfection said:
Incorrect, it was afterfire. Backfires are badddddd, when combustion occurs in the intake manifold or prior, aka the engine fires 'back', opposite of the way it should be. Afterfire is when the unburnt fuel ignites in the exhaust, making a pop and often (on catless vehicles) a burst of flame out the tailpipe(s). Afterfire is harmless, though may or may not be evidence of incorrect tuning.

Please keep in mind the distinction between these two terms.
Thanks for the distinction. I didn't know there was one. Learn something new every day.

IMPerfection said:
So does my SRT-4. Great sound, isn't it .
Yes. Yes, it is :beer
 

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IM A BAD ASS WITH A STICK
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IMPerfection said:
Incorrect, it was afterfire. Backfires are badddddd, when combustion occurs in the intake manifold or prior, aka the engine fires 'back', opposite of the way it should be. Afterfire is when the unburnt fuel ignites in the exhaust, making a pop and often (on catless vehicles) a burst of flame out the tailpipe(s). Afterfire is harmless, though may or may not be evidence of incorrect tuning.

Please keep in mind the distinction between these two terms.
when i worked at a landscape company i use to make the lawn mower back fire. sounded like a gun shot it was the coolest ever!
 
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