Stock exhaust DB test - Suzuki GSX-R Motorcycle Forums Gixxer.com

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post #1 of 18 (permalink) Old 11-21-2016, 02:27 PM Thread Starter
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Stock exhaust DB test

Hi All, new to the site and was looking for some info :-
Has anybody had a noise test on a stock pipe K6 750
I'd like to track the bike and the Tagma scorpion i have fitted is bonkers loud.
I still have the stock system but is it worth fitting
Thank you
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post #2 of 18 (permalink) Old 11-26-2016, 01:19 PM
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Re: Stock exhaust DB test

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Originally Posted by Gotanewgixer View Post
Hi All, new to the site and was looking for some info :-
Has anybody had a noise test on a stock pipe K6 750
I'd like to track the bike and the Tagma scorpion i have fitted is bonkers loud.
I still have the stock system but is it worth fitting
Thank you
You can get DB meters from eBay for around $15, just check how your track does the test. My GSXR failed badly so I wont be tracking it anytime soon
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post #3 of 18 (permalink) Old 11-26-2016, 02:05 PM Thread Starter
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Re: Stock exhaust DB test

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Originally Posted by springfall2008 View Post
You can get DB meters from eBay for around $15, just check how your track does the test. My GSXR failed badly so I wont be tracking it anytime soon


Thanks, I put the stock back on and I did by a DB checker. Not sure how accurate it is though but reading 98 at 7000rpm
Which track did it fail and what was the reading?


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post #4 of 18 (permalink) Old 11-27-2016, 07:10 AM
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Re: Stock exhaust DB test

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Thanks, I put the stock back on and I did by a DB checker. Not sure how accurate it is though but reading 98 at 7000rpm
Which track did it fail and what was the reading?
My local track (Castle Comb) says the following:

"Noise limit: STRICT 105 db(A), measured at ½ metre from the exhaust outlet at ¾ maximum revs"

So that's around 10,500 rpm on my bike. With the aftermarket exhaust I hit around 119db in my tests so I didn't even both to try at the track.

I can't seem to remove the aftermarket can either, it seems to be welded on - *sigh*
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post #5 of 18 (permalink) Old 11-27-2016, 07:18 AM Thread Starter
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Re: Stock exhaust DB test

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Originally Posted by springfall2008 View Post
My local track (Castle Comb) says the following:



"Noise limit: STRICT 105 db(A), measured at ½ metre from the exhaust outlet at ¾ maximum revs"



So that's around 10,500 rpm on my bike. With the aftermarket exhaust I hit around 119db in my tests so I didn't even both to try at the track.



I can't seem to remove the aftermarket can either, it seems to be welded on - *sigh*


That's really interesting.
Indeed they say the GSXR won't pass the noise test at castle Combe. Indeed they test at 3/4 revs which is not ACU standard. I've had friends fall foul of their non standard test. My ZZR sails through!
At Brands and other tracks they test at 7000 rpm at 1/2 m so much better
I too had trouble taking my scorpion off. Have you tried heating it off?. I had to take a blow torch to it and it took me several hours!
I've now measured the noise with a tester I bought from Amazon and at 7k we are at 98db


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post #6 of 18 (permalink) Old 11-27-2016, 08:18 AM
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Re: Stock exhaust DB test

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Originally Posted by Gotanewgixer View Post
That's really interesting.
Indeed they say the GSXR won't pass the noise test at castle Combe. Indeed they test at 3/4 revs which is not ACU standard. I've had friends fall foul of their non standard test. My ZZR sails through!
At Brands and other tracks they test at 7000 rpm at 1/2 m so much better
I too had trouble taking my scorpion off. Have you tried heating it off?. I had to take a blow torch to it and it took me several hours!
I've now measured the noise with a tester I bought from Amazon and at 7k we are at 98db

Yeh, I suspect I need to use a blow torch. My bike is quite new (just over 2 years old) and I'm not sure I'm quite ready to risk crashing it just yet.

I did a Ron Haslam race school this year on the CBR600's and was thinking I might go back and do the 1000's next year and then perhaps consider a bike rental for a Castle Comb track day.
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post #7 of 18 (permalink) Old 11-28-2016, 12:12 AM Thread Starter
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Re: Stock exhaust DB test

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Yeh, I suspect I need to use a blow torch. My bike is quite new (just over 2 years old) and I'm not sure I'm quite ready to risk crashing it just yet.



I did a Ron Haslam race school this year on the CBR600's and was thinking I might go back and do the 1000's next year and then perhaps consider a bike rental for a Castle Comb track day.


Well have fun. CC is a nice short track. Caution at Tower as it has a funny camber and you're over more than you think!


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post #8 of 18 (permalink) Old 11-28-2016, 10:53 AM Thread Starter
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Re: Stock exhaust DB test

I'm interested to know from members that have attended track days.
Which tracks and your exhaust configuration please
Many thanks


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post #9 of 18 (permalink) Old 11-28-2016, 11:37 AM
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Re: Stock exhaust DB test

Most K6-K7 600/750 bikes are too loud even in stock form to pass stationary dB test at one of the local tracks. The dB limit is 95dB @ 5500rpm (0,5m at 45 degree angle). Luckily they also have so called "noise days" when the limit is 110dB @ 4500rpm.

My friend's K7 600 with an Akrapovic slip-on + dB-killer and set valve in closed position did pass the test.
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post #10 of 18 (permalink) Old 11-28-2016, 11:38 AM Thread Starter
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Re: Stock exhaust DB test

Wow where's that! A sneeze is 95db!


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post #11 of 18 (permalink) Old 11-28-2016, 11:53 AM
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Re: Stock exhaust DB test

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Wow where's that! A sneeze is 95db!


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In Hämeenlinna Finland.

Here's some onboard footage from last year. This was one of the noise days and I was riding my K1.
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post #12 of 18 (permalink) Old 11-28-2016, 12:18 PM Thread Starter
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Re: Stock exhaust DB test

That looks fun. The tracks in the U.K. Vary between 102 and 110 DB
What software are you using for the lap timing?


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post #13 of 18 (permalink) Old 11-28-2016, 12:25 PM
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Re: Stock exhaust DB test

Racechrono + DashWare - Telemetry Data Overlay on Your Videos

I like the track but the walls are too close to ride faster than your normal comfort zone.
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post #14 of 18 (permalink) Old 11-28-2016, 01:56 PM
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Re: Stock exhaust DB test

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Racechrono + DashWare - Telemetry Data Overlay on Your Videos

I like the track but the walls are too close to ride faster than your normal comfort zone.
Yeh, they look a bit scary if you overcook the corner the barrier is going to hurt!
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post #15 of 18 (permalink) Old 11-28-2016, 01:57 PM
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Re: Stock exhaust DB test

Quote:
Originally Posted by -JK750- View Post
Most K6-K7 600/750 bikes are too loud even in stock form to pass stationary dB test at one of the local tracks. The dB limit is 95dB @ 5500rpm (0,5m at 45 degree angle). Luckily they also have so called "noise days" when the limit is 110dB @ 4500rpm.

My friend's K7 600 with an Akrapovic slip-on + dB-killer and set valve in closed position did pass the test.
Castle Comb doesn't say the newer GSXR's fail with stock cans (older ones certainly do), but mine has an scorpion carbon fibre one.
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post #16 of 18 (permalink) Old 12-01-2016, 03:41 PM Thread Starter
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Re: Stock exhaust DB test

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Castle Comb doesn't say the newer GSXR's fail with stock cans (older ones certainly do), but mine has an scorpion carbon fibre one.


Is it a short pipe? I had the Scorpion Tagma on mine



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post #17 of 18 (permalink) Old 12-02-2016, 02:34 AM
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Re: Stock exhaust DB test

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Is it a short pipe? I had the Scorpion Tagma on mine
It's a lot shorter than the stock pipe, like this one
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post #18 of 18 (permalink) Old 12-03-2016, 03:56 AM Thread Starter
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Re: Stock exhaust DB test

Do you have a picture with it in your bike?


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