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Gwilym
Inspector
Joined: 04 Oct 2007
Posts: 139
Location: Tadley,Hants.
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 Posted: Wed Mar 19, 2008 6:24 pm Post subject: |
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I e-mailed PM last week and they said June for the decibel killer   |
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Maver
Site Admin
Joined: 14 May 2007
Posts: 2193
Location: naaaaaarfolk we drive tractors and talk loike PIRATES
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| Posted: Wed Mar 19, 2008 7:25 pm Post subject: |
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| CheekyThomas wrote: | The DB killer will smoothen it all out as it will have increased the torque... BHP is only 1/2 the key...
What ya need is a PM pipe with a Exup valve fitted... best of both worlds!  |
Exup valve???????
please explain? my wallet is open......
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MikeHolland
Inspector
Joined: 26 Jul 2007
Posts: 150
Location: Sydney, Australia
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| Posted: Wed Mar 19, 2008 10:35 pm Post subject: |
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I am also waiting for that decibel killer. But my PM62 is the early model with the small downward-curved outlet pipe, so not sure whether there will be problems fitting it. Might have to replace the tail end of the exhaust too. But the new one looks much nicer.
Mike
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Rhoodman
Inspector
Joined: 16 May 2007
Posts: 151
Location: Oakham, Rutland
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| Posted: Wed Mar 19, 2008 11:36 pm Post subject: |
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| Maver wrote: | | CheekyThomas wrote: | The DB killer will smoothen it all out as it will have increased the torque... BHP is only 1/2 the key...
What ya need is a PM pipe with a Exup valve fitted... best of both worlds! |
Exup valve???????
please explain? my wallet is open...... |
Exup was an exhaust powervalve fitted to yamaha bike in the late 80's. It's a powervalve that constantly adjusts the internal diameter of the exhaust to match the engine revs. This was fitted to the FZR1000R, aptly named the 'widow maker'
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180trev
Inspector
Joined: 03 Jun 2007
Posts: 158
Location: lincoln
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| Posted: Thu Mar 20, 2008 11:58 am Post subject: tuning |
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| mb developments did on or rather has one on his bike and swears by it. |
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CheekyThomas
Guvernor
Joined: 18 May 2007
Posts: 1374
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| Posted: Thu Mar 20, 2008 6:40 pm Post subject: |
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| Yes indeed... EXUP is an exhaust valve to alter the gas flow depending on engine speed... nearly all sports bikes have them nowadays. |
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Rhoodman
Inspector
Joined: 16 May 2007
Posts: 151
Location: Oakham, Rutland
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| Posted: Thu Mar 20, 2008 7:28 pm Post subject: Re: tuning |
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| 180trev wrote: | | mb developments did on or rather has one on his bike and swears by it. |
That one's a little different, that's a two stroke power valve, the yamaha version was called the YPVS, it was fitted to bikes like the RD350lc and the RGV250. It alters the exhaust port timing.
The EXUP valve is designed for 4 strokes.  [list=][/list]
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