Noise Test...FAIL! :P

[MarkCMSV]

Just had a friend's Yamaha R6 noise tested at Brands Hatch.

It has a custom (pretty much non existent) exhaust and came out at 121.7db, around 5 times the noise limit at a lot of circuits and quoted by the tester as being "about as loud as an F1 Car"...oops! :p

[P.]

Doesn't beat the Supra at Brands... 123dB and then got flagged off the track. What a shame

[Pol Anorl]

[UnspeedySam]

[_Iain_]

[supZ]

its getting a bit silly.. just found out mallory next week is a 95db day.. my CBR blows 94 on a good day with just a slip on can and standard system. if im nearly on the limit i can only guess the trouble everyone else is going to have on higher tuned machinery..

you know its bad when bikes come out of the factory failing the noise tests
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CBR954RR - Daily toy
CBR600RR - Trackbike

[MarJay]

[Slacker24seve...]

My GPR twin cans, with the baffles in, was tested at 110 at Mallory. Gutted.
____________________
Triumph Daytona 675 track bike + girlfriend's Honda Hornet 600
Selling a hack/winter bike for less than a grand? PM me.
Banger rallies are ace

[UnspeedySam]

I dread to think what the ART cans on my TRX would test at. I currently have the standard ones back on which are insanely quiet. Need to find something in the middle I think...
____________________
Riding: BMW R1150RT `02 bought mildly crashed
Fixing: Also the BMW as I get less broken bits
Gone: ZZR600 '00, TRX850 '97, RXS100 '93, JS125-6B '07, BMW R1100RS '93, Kawasaki ZX-6R-J2 '01, Honda Bros NT400 NC25 '88

[MarkCMSV]

[MarkCMSV]

[Snorty]

Basically decibels are not additive units, they are on a logarithmic scale as described.

Much like the richter scale, a scale 9 earthquake is an order of magnitude stronger (10 times stronger) than a scale 8.

Decibels work in the same way, so 23dB would be a lot quieter than 115dB (way way quieter than 5x).
____________________
Current: Yamaha FZ1 '07 | GSXR 750 SRAD

Past: CB125TDC | TZR125 | GPZ500 | CBR600F3 | ZX9-R | GSXR1000 K4

[MarkCMSV]

What would the ratio be between 105db and 121.7db then?

Not sure if 5 x is correct,

[Bendy]

'pretty much non existant' exhausts are soo stupid. Never understood why people think being offensively noisy and annoying everyone else is somehow 'cool'.

Oooh, your bike is well noisy and has no mirrors. You must be that Francis Rossi bloke, please sign my t-shirt.

[MarkCMSV]

What would the ratio be between 105db and 121.7db then?

Not sure if 5 x is correct,

[Tenko]

My Gixxer failed the 105db test at Cadwell last year. Those nice men in scrutineering still let me out though as the bike is 20 years old and I am ancient - their rational was that an old codger like me wasn't likely to rev the thing very much....

[MarkCMSV]

BTW...My friend wasn't booked onto the trackday, he just wanted to see what the reading would be...knew it would be too loud.

[map]

[Rogerborg]

[Aff]

[Hetzer]

[Bendy]

[Kickstart]

[DrDonnyBrago]

[Ayrton]

Everyone thinks that having a loud exhaust stops accidents and makes people see you, but it doesnt. im quite often sat in a car and even with a loud bike i cant hear the bike until its alongside the car.

Loud exhaust are unneeded. They just piss people off.