Bike Loudness

[snowdude2004]

Currently my bike is pretty damn loud and I'm trying to find a way of making it quiet. Currently I have a seal off the top of the airbox off since having it in made the bike go to crawling speed whenever I tried to pull away. To reduce the idle slightly and the noise I will be putting this annoying seal back on.

Putting my hand over the end of the exhaust takes away alot of the noise so I know the problem mainly will be coming from that however I do not have money for an exhaust and will be selling it within 2 weeks.

any other ideas what can be done to the 50cc to shut it up a little?
____________________
CBT passed: 26/09/09, Theory Passed: 18/08/10, Mod 1 passed: 20/10/10, Mod 2 passed: 26/10/10.
Current Bike: Honda CBR 400 Nc23

[Frost]

Different end can will help. If you have a standard end can then you might have some internal problems. Generally 50's are bought be inexperienced newbies who register on here the next day asking how to derestrict it with the assistance of a cordless drill. The average person through hearing average road cars, and seeing formula 1 on TV has made the connection that loud = fast, all 18 year olds want the fastest bike known to man and will probably pick the louder 50 every time

[pinkyfloyd]

easy to fix problem

get ride of the 2 stroke and buy a 4 stroke!
____________________
illuminateTHEmind wrote: I am just more evolved than most of you guys... this allows me to pick of things quickly which would have normally taken the common man years to master
Hockeystorm65:.well there are childish arguments...there are very childish arguments.....there are really stupid childish arguments and now there are......Pinkfloyd arguments!
Teflon-Mike:I think I agree with just about all Pinky has said.

[snowdude2004]

I know going for a 4 stroke would solve the problem however I'm picking up a zxr 400 tomorrow to ride when I pass my test however this problem needs to be sorted first as i'm coming up to selling it in the next few weeks.
____________________
CBT passed: 26/09/09, Theory Passed: 18/08/10, Mod 1 passed: 20/10/10, Mod 2 passed: 26/10/10.
Current Bike: Honda CBR 400 Nc23

[Blau Zedong]

[snowdude2004]

Lots of useful comments in this thread
____________________
CBT passed: 26/09/09, Theory Passed: 18/08/10, Mod 1 passed: 20/10/10, Mod 2 passed: 26/10/10.
Current Bike: Honda CBR 400 Nc23

[L4Isoside]

Pack the 'zaust with mud*.


*or what ever you have at your disposal

[Teflon-Mike]

Can you remove the end of the silencer?
Often the bit with a hole in is held on by screws or rivets around the edge.
If you can take it off, its possible that some-one previousely took it off, and 'forgot' to put the packing back in....
again, ideas of loud=fast.
You can buy fibre-glass exhaust paking, if you have a look around, but its basically the same stuff as luft insulation.
for the amount you need, lifting the hatch to your attic and pulling a few tufts out the insulation should provide ample to take a bit of the sting out the sound!
More helpful?
____________________
My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?'

[snowdude2004]

Teflon Mike that's more useful compared to "Pack the zaust with mud" and "get ride of the 2 stroke and buy a 4 stroke!.

I took the silencer off a few days back and it still has the padding which is a particular size to fit/standard packing so surely I shouldn't need any as none of the holes are blocked inside and the padding still has life left in it.
____________________
CBT passed: 26/09/09, Theory Passed: 18/08/10, Mod 1 passed: 20/10/10, Mod 2 passed: 26/10/10.
Current Bike: Honda CBR 400 Nc23

[Kickstart]

Hi

The padding is often sold in moto cross bike shops. Over time the stuff compresses (from absorbing the noise and being soaked in oil / petrol residue) and lands up absorbing less noise and needs replacing.

If you want a short term bodge then use glass fibre loft insulation (it is a lot finer, but will do the job for a short while).

Also check if there is any kind of seal at the end that has worn out. Eg, on my TZR250 there is a foam ring around the end of the baffle to seal it against the rest of the can. This also compresses and starts to leak.

Can you post a piccy of the exhaust and baffle?

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Willson]

Pack it with loft insulation?

While I'm at it I'll reseal my forks with some kleenex
____________________
Benson: Wouldn't life be easier if we were all turtles?
Me: Pig on bread = The way forward.
Riding: '00 Suzuki SV650S. Previous: '99 Kawasaki ER5 - sold, '02 Suzuki GZ125 Marauder - sold

[snowdude2004]

[pinkyfloyd]

ok heres the plan.... let the police send vosa round to test. if they find that the exhaust noise is within the legal limit then fuck the neighbours

i'd take great pleasure in pissing them off as often as possible knowing the police have had the bike tested
____________________
illuminateTHEmind wrote: I am just more evolved than most of you guys... this allows me to pick of things quickly which would have normally taken the common man years to master
Hockeystorm65:.well there are childish arguments...there are very childish arguments.....there are really stupid childish arguments and now there are......Pinkfloyd arguments!
Teflon-Mike:I think I agree with just about all Pinky has said.

[Kickstart]

Hi

Noise is VERY difficult to check subjectively. 3db is barely noticeable but is a doubling of noise.

Almost certain that any aftermarket sports exhaust is going to be too noisy, especially if a bit old.

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing