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Fisher said:
I sincerely doubt it will make ANY noticeable difference to sound...
We really are talking about a very minute difference...

This mod would be easy to enough to do at the meet.
I could do it for you Saturday night if you wish?
And then mine Sunday morning :p

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I sincerely doubt it will make ANY noticeable difference to sound...
We really are talking about a very minute difference...

This mod would be easy to enough to do at the meet.
I could do it for you Saturday night if you wish?
that would be amazing fish, i dont have my tool kit now, so i guess we'd have to do it at yours? also i dont have bungs but tell me what i need and i'll get them :)
 

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that would be amazing fish, i dont have my tool kit now, so i guess we'd have to do it at yours? also i dont have bungs but tell me what i need and i'll get them :)
Well, either a set from Benji, or generally ANYTHING the correct size will work...
I used a bolt for mine.

I believe the dimensions are 10mm? preferably with a 12mm lip.
You don't REALLY need any tools to be honest...
Unless you want to remove the valve completely, but even then it wouldn't require much.

Also, it would be ideal if you can get one of those hose clamp things:
 

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Quite simple actually...

All it does is bypass air from the air box directly in to the exhaust.
This allows COMPLETE combustion to take place in the exhaust, and therefore makes the emissions cleaner.

The theory is, that if you bung this thing up, then ALL the air has to go through the engine.
And more air to the engine = better.
I imagine this also does something to the backpressure...

Where I would question this, is that our engine doesn't adjust the fuel mixture on the fly as we do not have a lambda (oxygen) sensor in the exhaust so even if it gets more air to the engine, it wont get the extra fuel to the engine.

In an ideal world, it would work like this: More air, means more FUEL can also be added, therefore more bang. Same principle a turbo works on.
So that really just leaves the back pressure...
now i know this is from like 9 years ago but, a yzf is 4t, not 2t, they do not need back pressure, the valves are all shut during the compression stroke, backpressure isnt needed
 
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