Does exhaust leakage matter?

[Jimmygixxer]

After reassembling my micron exhaust, i noticed where the link pipe meets the headers there is a small amount of blowout.
Alot of people seem to try and get an airtight seal in these areas.
Does it make much difference to anything?   My bike will backfire a little bit off the throttle from highish revs, is this a possible factor or not?

[darrsi]

Ideally it should be a good seal but i don't think it's a major.
My bike used to pop on deceleration, but it went away when i got the carbs balanced.

[red98]

could fail mot if tester spots it....if origanal steel pipes get them welded before it gets any worse 

[keno]

Had that problem with my fazer a few years ago, i just bought some heat resistant sealant smothered it on then joined together and left to cure for 2 days,problem solved.
Mine was really bad so had no choice.

[Young rider]

mine does that too kinda like the popping noise.

never bothers me with the leaking bit.[size=78%] [/size]

[Dead Eye]

Isn't the popping noise due to a bit of fuel vapour that isn't burnt off when chopping the throttle at high revs combusting in the exhaust? Can't see it being anything to do with a small exhaust leak...

[bwizz]

My old fazer had a slight leak on the front pipes , It used to pop and bang on overun
sounded ok I thought at the time

[Jimmygixxer]

Isn't the popping noise due to a bit of fuel vapour that isn't burnt off when chopping the throttle at high revs combusting in the exhaust? Can't see it being anything to do with a small exhaust leak...

Thats what i thought, but seen a few people online saying thats what was causing their problem.

[bandit]

If you want to sort it this is the stuff,
 http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_173139_langId_-1_categoryId_255217 

[Jimmygixxer]

If you want to sort it this is the stuff,
 http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_173139_langId_-1_categoryId_255217 

thanks

[Ton13]

i have a micron Exhaust and also have a small amount of leakage....
this is usually normal and is the condensation from when you first start up the bike.
ive never failed a MOT or had any problems with it....
 
ALSO, the popping noise is awesome, especially if you're going under a bridge or through a tunnel!

[darrsi]

This fella explains the 'popping' quite well:

http://forum.motorcycle-usa.com/default.aspx?f=18&m=398516

[Dead Eye]

Nice find darrsi, was a good read

[keno]

My fazer 600 & zrx 1200 both pop and fart on the overrun.
Zrx is the loudest but sounds great,its all part of the aftermarket replacements.
If it bothers you get jetted.