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Ady September 26th, 2005 02:41 PM

After market very very quiet exhaust please !
Hello Again
In sunny England and particularly where I live, it is getting harder and harder to find places to go out and have a practice or fun ride.
The biggest issue is the noise. Noise / complaints / police ... you know the drill.
I do recall one of the regulars had developed his own full exhaust and even managed to get the sound levels down to something like 80 decibels.
However, to my knowledge there is not an after market silencer available.

I've heard about the new (twin silencer) 250 4-strokes that are at something like 74 decibels output, and wonder if there is anything to make my big lion sound like a little mouse....
I don't mind sacrificing some of the power - there's plenty to spare.

Can anybody advise please


Supermototeam September 26th, 2005 06:07 PM

Akro is the way to go.
Our esteemed Frydaddy (Lee Fryberger) told me that the factory Akro slipon tested at 90Db when they tested it at the ISDE a couple of weeks ago. That's with the plug in.


Brett Saunders

fryguy September 26th, 2005 06:14 PM

This is true and as one person who happened to be on the business end of the Akro commented, it Barks!!!

Of course hp increase with slipon is trivial, but 4 horsies is claimed from the full system, sold for the 650 model. Again, jetting, altitude and state of tune will affect performance of both std and modified motors.

fryguy aka frydaddy


BrianSM September 26th, 2005 10:36 PM

LeoV claims 2.4 HP with a slip on......or is he referring to a condom... I'm goin want quiet keep the stock pipe..... really hard to beat IMHO :D

Jocke_D September 27th, 2005 12:30 AM

I'm pretty confident that my akra, with, the plug, is a lot less noisy than the stock muffler.

A friend of mine got picked of a race, using his stock exhaust, due to noise. 103dB...

A couple of hoses wrapped around the outside at the end of the muffler can be very useful. Secure them with what we call slangklämmor, hehe. It seems that much noise comes from vibrations in the body of the muffler.
See attached picture to get what I mean (not the best picture).

Maddel September 27th, 2005 04:28 AM

Here we go for a nice slangklämmor:
In German it's a Schlauchschelle.... :D
What most of you call a hose clamp.
Ok, this is really off topic! :oops:

Ady September 27th, 2005 04:37 AM

Quiter pipe
Hmm interesting.
Jocke_D that hose on the end suggests maybe the answer is a longer stock tailpiece?


Jocke_D September 27th, 2005 04:39 AM


Originally Posted by Maddel
Here we go for a nice slangklämmor:
In German it's a Schlauchschelle.... :D
What most of you call a hose clamp.
Ok, this is really off topic! :oops:

Thanks a lot :hathat49:
Now my colleagues are thinking "why the heck is he laying on the floor laughing his stomach out"...

Actually, that is a slangklämma with a singular -a at the end. The -or in slangklämmor tells us that they are plural. I thought about calling them hose clamps at first but wasn't sure it was right. Too bad.

By the way Maddel, the pic is from the first practise session at the new track we discussed earlier. It looks like we're going to have a test drive of the 06 models in oktober at our very own track :D

Ady September 27th, 2005 04:47 AM

'Jubilee Clip' in my part of the world.

gruntunberg September 27th, 2005 01:26 PM

noisy fecker
thought you,ed sold the berg ady not seen you on uhe for a while , first see if the oe can needs repacking i dont reckon the standard pipe is to bad :) are you doing driffield on sunday ?

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