Exhaust popping noise?

[hallasv]

I have a SV650-S 99-02 running a stock exhaust with a drilled baffle (2x4mm holes)
Noticing lately when idle especially, there is alot of splutter, popping or spitting noise coming from the exhaust. Too the point where near buying a new exhaust that noticable.
Is this a exhaust problem or something else?

[Alpinestarhero]

sounds like the fuel/air mixture is too rich (too much fuel). Is the choke ok?

[hallasv]

had the choke out not so long ago, and seems to be ok. Could it be a loss of back pressure from the drilled baffle?
With getting a new aftermarket exhaust how would I adjust this to suit?

[warrenhewitt10]

the carbs probably need balanced. i had a mate whos bike was doing something similar and thats wot the problem was!

[hallasv]

had a feeling it might be that.... curses.
Will get my new exhaust first then get round to that to avoid further costs!

Also noticed other day, took the bike for a good run, and found a empty road and gave it some rag, when got over 100 alot of black smoke came out of the back. Could this be a sympton of running lean/rich or could it be just the fact I never really gun the bike much?

[Binky]

I may be completely wrong here, but is black smoke not when you overfill with engine oil??? Or is it white/blue smoke??? :confused:

[hallasv]

oil when burnt makes a bule/white smoke. This was black as ace of spades, so presuming either settled carbon in exhaust or bike running rich?

[warrenhewitt10]

http://file047a.bebo.com/8/original/2009/07/08/10/15062929a11185284567o.jpg

thers wot the service manual says about that sorta thing..

[hallasv]

hmmm im thinkin worn piston rings there as does tend to use alot of oil lately...
But the smoke never comes out really except for that once :S

[warrenhewitt10]

the bike wasnt de-restricted recently was it?

[hallasv]

only very recently, was doing this issue long before de-restricted however.