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TheArchitect
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PostPosted: 13:14 - 24 Apr 2015    Post subject: Loud pipes and ear plugs Reply with quote

I installed a new can to my GSR recently. Reason was partially for aesthetic reasons and partially because I wanted to make the bike louder.

Now I've notice that with the baffles the bike is too quiet, and without the baffles it's far too loud. Loud to the point where I end up with a headache and ringing ears by the time I finish my journey.

The can has two out pipes so I tried with one baffle in and one out. It's kind of bearable now.

Is there any mods I can do to find some middle ground in terms of sound? A friend suggested drilling holes on the face plate of the baffles, starting with one or two holes and increasing as required. Has anyone done this and does it work?

Oh, and on ear plugs - I have an appointment with specsavers tomorrow to get some custom earplugs made up. got a voucher so will get them half price, normally £125 I think.
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Minty
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PostPosted: 13:19 - 24 Apr 2015    Post subject: Reply with quote

I have a dbkiller cut to about 3 inches long for days I go out to bike meets (not giving popo easy pull) and they supress it a smidge, not much. Maybe try that, x2?
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TheArchitect
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PostPosted: 13:29 - 24 Apr 2015    Post subject: Reply with quote

Minty wrote:
I have a dbkiller cut to about 3 inches long for days I go out to bike meets (not giving popo easy pull) and they supress it a smidge, not much. Maybe try that, x2?


My baffles are tiny as they are so cutting any more off the shaft bit isn't an option as it won't sit properly. Drilling holes on the face plate might allow a bit more flow (is the theory) so that might work. Just don't want to do it as there is no undoing it.

I rode past a number of police cars last night blaring with both baffles out and they didn't look twice. One officer in a van even gave me a friendly nod. Believe me these cans are loud, almost embarrassing as everyone turns to look which I find awkward!
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Minty
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PostPosted: 13:40 - 24 Apr 2015    Post subject: Reply with quote

LondonCommuter wrote:
Minty wrote:
I have a dbkiller cut to about 3 inches long for days I go out to bike meets (not giving popo easy pull) and they supress it a smidge, not much. Maybe try that, x2?


My baffles are tiny as they are so cutting any more off the shaft bit isn't an option as it won't sit properly. Drilling holes on the face plate might allow a bit more flow (is the theory) so that might work. Just don't want to do it as there is no undoing it.

I rode past a number of police cars last night blaring with both baffles out and they didn't look twice. One officer in a van even gave me a friendly nod. Believe me these cans are loud, almost embarrassing as everyone turns to look which I find awkward!


Sounds like they are set just right. Thumbs Up

Sympathies to your neighbours though.
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chickenstrip
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PostPosted: 13:44 - 24 Apr 2015    Post subject: Reply with quote

What?! Speak up, I can't hear you!

A lifetime of loud rock music and equally loud bikes hasn't hurt my hearing too badly Laughing
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Motorhate
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PostPosted: 13:51 - 24 Apr 2015    Post subject: Reply with quote

LondonCommuter wrote:
Minty wrote:
I have a dbkiller cut to about 3 inches long for days I go out to bike meets (not giving popo easy pull) and they supress it a smidge, not much. Maybe try that, x2?


My baffles are tiny as they are so cutting any more off the shaft bit isn't an option as it won't sit properly. Drilling holes on the face plate might allow a bit more flow (is the theory) so that might work. Just don't want to do it as there is no undoing it.

I rode past a number of police cars last night blaring with both baffles out and they didn't look twice. One officer in a van even gave me a friendly nod. Believe me these cans are loud, almost embarrassing as everyone turns to look which I find awkward!


I wouldn't worry too much about it mate. I've got straight through shotguns on my XVS1100 and a straight through stubby on my CB500 (which is insanely loud) and not been pulled by plod once. I had one stroppy motorcycle cop ask me where my baffle was as he pulled up next to me at the traffic lights but before I could answer he roared off when he saw a cyclist jump the lights.
The neighbours hate my guts and probably want to nail my bollocks to the mast of a sinking ship but apart from that, alles gut!
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TheArchitect
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PostPosted: 14:44 - 24 Apr 2015    Post subject: Reply with quote

to be honest i'm less worried about the feds as I am about the health of my ear drums! Hence the appointment with the hearing specialist tomorrow to get some custom earplugs.

Also don't want to be seen as antisocial so trying to tame the sound a tad bit but still being loud enough to have a presence on the road.

And to think I was considering decat to make it even louder!! Shocked
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Motorhate
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PostPosted: 15:04 - 24 Apr 2015    Post subject: Reply with quote

LondonCommuter wrote:
to be honest i'm less worried about the feds as I am about the health of my ear drums! Hence the appointment with the hearing specialist tomorrow to get some custom earplugs.

Also don't want to be seen as antisocial so trying to tame the sound a tad bit but still being loud enough to have a presence on the road.

And to think I was considering decat to make it even louder!! Shocked


Do you commute through Bounds Green during the week ? There's a GSXR with pretty loud exhausts that I see most mornings.
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TheArchitect
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PostPosted: 15:11 - 24 Apr 2015    Post subject: Reply with quote

Motorhate wrote:

Do you commute through Bounds Green during the week ? There's a GSXR with pretty loud exhausts that I see most mornings.


Not me! I'm on the red GSR usually heading down Green Lane.
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Matt B
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PostPosted: 15:39 - 24 Apr 2015    Post subject: Reply with quote

Decent earplugs, or any earplugs, are the way to go Thumbs Up

I use the Moldex Comets now. Not exactly custom made £125 jobs but better than the foam ones.

Interested to know what you think of the custom ones when they are done.
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Northern Monkey
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PostPosted: 17:06 - 24 Apr 2015    Post subject: Reply with quote

Foam ones block more noise than the expensive ones.

Foam ones are rated in excess of 30db sound reduction. It is unusual to find custom made expensive ones which give a sound reduction of 30db, most I found were nearer 20-25
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TheArchitect
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PostPosted: 17:27 - 24 Apr 2015    Post subject: Reply with quote

Alans Snackbar wrote:
Foam ones block more noise than the expensive ones.

Foam ones are rated in excess of 30db sound reduction. It is unusual to find custom made expensive ones which give a sound reduction of 30db, most I found were nearer 20-25


I believe it's more about the reduction of the resonance as opposed to the loudness of the sound itself. Sort of like cutting back the bass a bit. The one's I'm looking into essentially do that thus allowing you to still hear all the ambient sounds but with less of the low frequency.

...I could just be talking out of my arse there but we'll see!! Very Happy
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Sable
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PostPosted: 17:30 - 24 Apr 2015    Post subject: Reply with quote

NKVD fan wrote:
This is why loud pipes are shite. I did 30 miles on my 350 the other night without earplugs and had tinnitus for an hour after. Standard is always best.


Could not disagree more. 44 mile of filtering through London a day on my Trackstar, embarrassingly loud end can, but alerts people to my presence far more than a toot toot on the horn.
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SofaBear
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PostPosted: 18:33 - 24 Apr 2015    Post subject: Reply with quote

had the same thing myself. bought a 200x pack of foam ear plugs from screw fix. they are a bit uncomfy when they aren't sat right as they squidge in and out of my ear. but when they are in its great.

First time i went for a ride with out them i was like FUCK ME WHAT HAVE I DONE TO MY BIKE!? ITS SO FREAKING LOUD!

But london commutes + loud pipes = get the fuck out of my way without me waiting for you to see me.
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stevo as b4
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PostPosted: 18:37 - 24 Apr 2015    Post subject: Reply with quote

Standard is only best for the best balance of all factors combined.

Personally I've always though changing pipes for sound only or even for looks is a bit pointless.

There's lots of scope for exhaust system design and tuning for bhp/torque gains, and bigger numbers or more shove is the only reason I would be changing an exhaust on any vehicles really.

My car has a very different character in the way the power is delivered, how well it picks up etc and in transient throttle response with a full exhaust system changed to something performance orientated. It's also a gain of 20bhp on a std engine and more low down/earlier power delivery at the expense of top end delivery etc.

I'd change a pipe on my KMX125 for another 1bhp+ at peak or over a couple of thousand rpm.

other better examples would be bikes like Bandit 1200's and XJR1300's where a full performance exhaust system can with supporting changes to fueling add 25bhp in some cases. With gains like that it's just rude not to change the exhaust system IMO.

Big motors like ZX14's Blackbirds and Busa's can have really nice double figure power or torque improvements with the optimal exhaust systems fitted.

Even a Vauxhall Corsa 1.2 would have far better throttle response and a bit more performance with the optimal manifold-tailpipe exhaust configuration.
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Accuhaler
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PostPosted: 18:45 - 24 Apr 2015    Post subject: Reply with quote

£125 on earplugs are you crazy?

https://www.ebay.co.uk/itm/Industrial-Earplugs-3M-Blue-Tracers-Detectable-Reusable-Silicone-Ear-Plugs-32db-/111382772367?pt=LH_DefaultDomain_3&hash=item19eeee3a8f

we use these on the airport.....
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ferrisio
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PostPosted: 20:00 - 24 Apr 2015    Post subject: Reply with quote

Alans Snackbar wrote:
Foam ones block more noise than the expensive ones.

Foam ones are rated in excess of 30db sound reduction. It is unusual to find custom made expensive ones which give a sound reduction of 30db, most I found were nearer 20-25


Expensive plugs fit better and can have controllable frequency and attenuation. What this means is that you can have 'normal' hearing but with the damaging noise levels reduced. Foam plugs work well, but get rid of everything so you get that out-of-touch-with-the-world feeling that I find distracting.
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mattyfattyboo...
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PostPosted: 20:10 - 24 Apr 2015    Post subject: Reply with quote

I tried ear plugs last week for the first time. They seemed to reduce the volume of some frequencies but others such as the exhaust were louder. Had to take them out in the end they gave me a headache. Sad Sounds like it's worth me trying some better ones (these we're crap foam ones)
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Albigularis
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PostPosted: 21:01 - 24 Apr 2015    Post subject: Reply with quote

Sable wrote:
Could not disagree more. 44 mile of filtering through London a day on my Trackstar, embarrassingly loud end can, but alerts people to my presence far more than a toot toot on the horn.


Definitely not. Imagine riding with your horn button glued down, that's the only basis for comparison here, and I bet you would have way more people notice you in that case.
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Northern Monkey
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PostPosted: 21:12 - 24 Apr 2015    Post subject: Reply with quote

mattyfattyboomboom wrote:
I tried ear plugs last week for the first time. They seemed to reduce the volume of some frequencies but others such as the exhaust were louder. Had to take them out in the end they gave me a headache. Sad Sounds like it's worth me trying some better ones (these we're crap foam ones)


They take a bit of a knack to get them in right, otherwise they are almost useless for the lower exhaust and wind noise frequencies.

If you get them in properly, they are very effective. I wont go more than a mile without them in
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talkToTheHat
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PostPosted: 22:15 - 24 Apr 2015    Post subject: Reply with quote

If it's so loud if gives you hearing damage can you hear other vehicles approaching?

Ringing ears afterwards is permanent hearing damage.

16 years of loud environments as musician/recording studio trained monkey/denizen of the music scene, a false start in engineering and hobbyist time with artillery and light infantry has given me an appreciation of my hearing and mouldex sparkplugs are almost always to hand.

I find foam plugs kill wind noise really well, but touch the bass boom of my exhaust less, so with earplugs in I hear exhaust symphony, plugs out at motorway speed is mostly wind noise.

A twin tone horn has plenty of presence and is more likely to be perceived as a noise made because you have not been seen. That's a pile of super-loud that you don't have to endure whether you need it or not and is less likely to be seen as anti-social.
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