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View Full Version : Took the zaust off my cg - will it damage it?

Magnum
22-03-09, 10:07 PM
My exhaust needs a bit of a clean, so i took it off just now and ill polish it tomorrow.
Out of curiosity i turned on the engine, and it made a very strange bubbling noise (imagine putting your mouth in a sink of water and blowing).
I turned it off after a few seconds because i was a bit concerned.
I obviously dont want to run it without an exhaust, but it will be interesting to see what it sounds like.
Ive seen enough youtube vids of faster bikes without any exhaust, and people seem to say that it doesnt harm the bike, just loses a bit of power, but when it made that sound i was a bit worried despite this.

Is there any way this would damage my bike?
DarrenSV650S
22-03-09, 10:09 PM
My old 125 made that sort of noise without exhausts too. Not sure why
suzsv650
22-03-09, 10:12 PM
My old 125 made that sort of noise without exhausts too. Not sure why


LOL;)

Na its fine.. take the air filter off as well :D
SV-Sexy-virgin?
22-03-09, 10:13 PM
it wont damage it at all allthough unsure to what noise your hearing

they sound the nuts with no exhausts
Magnum
22-03-09, 10:14 PM
Hmmm... i was kind of hoping for a meaty sound... but it just made me laugh :D
I'll give it a go in the morning at see what it sounds like at higher revs.
suzsv650
22-03-09, 10:20 PM
Hmmm... i was kind of hoping for a meaty sound... but it just made me laugh :D
I'll give it a go in the morning at see what it sounds like at higher revs.

Its a 125... i rode my old SV round the block with no can so fun:D
Magnum
22-03-09, 10:24 PM
Im a bit worried about the hot air damaging the frame. There seems to be a plastic coating on the frame, and the exhaust hole is pointing towards it.


http://hermonglogue.co.uk/parts/CG125W.jpg
Magnum
22-03-09, 10:34 PM
haaa this is what it sounded like :D
http://video.google.com/videoplay?docid=8824953032281424398
SV-Sexy-virgin?
22-03-09, 10:36 PM
i thought u ment the sv lol cg with now exhaust sound like an angry hairdryer lol
DarrenSV650S
22-03-09, 10:37 PM
haaa this is what it sounded like :D
http://video.google.com/videoplay?docid=8824953032281424398
Yep that's what mine was like. A loud bubble machine
kurtis.randle
22-03-09, 10:38 PM
haaa this is what it sounded like :D
http://video.google.com/videoplay?docid=8824953032281424398


if u do keep it of put a mesh to stop anything going in same with air filter if u decide that w.
Magnum
22-03-09, 10:39 PM
i thought u ment the sv lol cg with now exhaust sound like an angry hairdryer lol

haha

*dissapointed look*
Magnum
22-03-09, 10:42 PM
if u do keep it of put a mesh to stop anything going in same with air filter if u decide that w.


You mean a mesh over the open hole? I'll just take it round the block, i shouldnt need to cover it just for 5 mins.
kurtis.randle
22-03-09, 10:44 PM
You mean a mesh over the open hole? I'll just take it round the block, i shouldnt need to cover it just for 5 mins.


maybe not but i would as if anything went in there i would of thought it would damage it alot. YES ?
Sally
22-03-09, 10:45 PM
I would cover it up.. :)
Magnum
22-03-09, 10:45 PM
I dont know what to use for it...
kurtis.randle
22-03-09, 10:48 PM
I dont know what to use for it...

NIETHER WOULD I woops caps but i dont think its worth the risk if u did without exuast does it excite you that much haha?? .upto u thou
gettin2dizzy
22-03-09, 11:00 PM
You could put a spanner through a cg engine and it wouldn't kill it ;)
alexs
22-03-09, 11:10 PM
I wish they made SV bolts out of CG engines :(
hob
22-03-09, 11:13 PM
LOL!
Magnum
23-03-09, 09:39 AM
It may sound like a bubble blower at idle, but when you rev it its fckunn loud! Im taking it round the block :D
suzsv650
23-03-09, 12:51 PM
It may sound like a bubble blower at idle, but when you rev it its fckunn loud! Im taking it round the block :D


Go for it that man! did you do the air filter too?
Magnum
23-03-09, 01:48 PM
Go for it that man! did you do the air filter too?

Na i didnt really look at where the air filter was. I didnt want to do too much to it since i had to re assemble it for college.

Without the exhaust it sounds epic! I rode round the block twice and it was sooooo loud. Everyone was looking at me. I rode past some guy washing his bandit and he looked really confused.
It didnt seem to go as fast as usual, but it sounded amazing.
To be honest i can understand why its illegal :D
suzsv650
23-03-09, 03:51 PM
Na i didnt really look at where the air filter was. I didnt want to do too much to it since i had to re assemble it for college.

Without the exhaust it sounds epic! I rode round the block twice and it was sooooo loud. Everyone was looking at me. I rode past some guy washing his bandit and he looked really confused.
It didnt seem to go as fast as usual, but it sounded amazing.
To be honest i can understand why its illegal :D


Well yea... on me 350LC if you take the baffles out its teribly loud and the powerband is actully better.. altho thats a 2stroke.
suzsv650
23-03-09, 03:54 PM
there is a vid someware withs some dude holding one of these to this exhaust thtl be loud! (http://www.backyardentrepreneur.com/files/2167279/uploaded/megaphone.jpg)
keith_d
23-03-09, 04:04 PM
<snip>

It didnt seem to go as fast as usual, but it sounded amazing.
To be honest i can understand why its illegal :D

If you had a way of measuring it you'd probably find it used up more petrol than normal too. The valve timings on most engines have the inlet and exhaust valves open at the same time so that the departing gases help to suck the fresh mixture into the cylinder.

With no exhaust the hot gases leave faster and pull some fresh mixture straight through the cylinder and out the other side. Result, less power and some petrol wasted, oh and lots of noise from those fast moving gases.

Keith.