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View Full Version : After market Exhaust popping...bad?

Kinvig
19-08-07, 02:25 PM
So my mate, MacGuffin, finally got round to removing the baffle from his Curvey SV. He'd been riding round forever with the baffle in & was quite chuffed with the popping sound when slowing down & changing gear.

When MacGuffin's bike is baffle free the bike's always popping & when he changed gear to second from third he got a really loud bang. Loud enough to scare tourists on the Strand....except the 2 italian GP fans that started flicking their wrists want to hear mo' revs....bless.

Is the popping & odd bang sound bad for the bike/engine? Should I advise MacGuffin to put hte baffle back in? He did put loads of sealent on the exhaust pipes.....he say's that it's just been burning off as evidenced by smoke from the exhaust & a funny burning smell.

If you ask me MacGuffin is a naughty boy for removing his baffle...but the gxsr 1000 next to him at the lights was stil louder.....think MacGuffin's got some sort of envy thing going on. ;o)
Ratty46
19-08-07, 03:01 PM
my pipe has no baffles

wehn i shut shut the throttle or throttle off in third it pops and crackles but i thought thast just the overrun? being louder etc due to no baffles.
its does it in the higher gears too but not a loud as in third.

leave em out! it sounds goooood...
kwak zzr
19-08-07, 03:18 PM
great init:)
Ratty46
19-08-07, 03:23 PM
great init:)

its the mutts mate...i lurve it:cheers:
toonyank
19-08-07, 03:32 PM
Properly tuned it shouldn't make any popping it's just running a tad lean if I'm correct. With the baffle in it doesn't pop because it's nearer to being tuned properly mostly not because it's baffled although the baffle will silence some of it.
DoodleBug
19-08-07, 04:29 PM
Its running lean and/or has a slight leak which sucks in air when changing down. Both of these things can lead to valve damage, best to get it checked out properly!
southy1978
19-08-07, 11:09 PM
I believe the popping is due to the p.a.i.r system injecting air into the exhaust to clean the emissions up, as the standard can is so huge you don't hear it.
Someone more knowledgable will be along soon enough to confirm/ blow out of the water my answer.
Jester666
20-08-07, 10:37 AM
I believe the popping is due to the p.a.i.r system injecting air into the exhaust to clean the emissions up, as the standard can is so huge you don't hear it.
Someone more knowledgable will be along soon enough to confirm/ blow out of the water my answer.

IIRC the P.A.I.R system is only on Euro issue bikes, or is it on the U.S models?
Shouldn't be an issue here. Mine pops ang bangs loud enough to scare small children! :smt077

Kinvig, your mate MacGuffin. Is that your female builder pulling alter-ego by any chance? :D
Kinvig
21-08-07, 07:10 AM
IIRC the P.A.I.R system is only on Euro issue bikes, or is it on the U.S models?
Shouldn't be an issue here. Mine pops ang bangs loud enough to scare small children! :smt077

Kinvig, your mate MacGuffin. Is that your female builder pulling alter-ego by any chance? :D

MacGuffin is a good friend of mine. He didn't want to post anything nefarious in his own name on a public forum but I had no such qualms posting for him ;o)

The louder exhaust seems to get a bit more respect from the gixxers....which is nice.