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January 14th, 2008, 10:15 AM   #1
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Jetting change with disconnetion of the engine breather?

Hi,

I just wanted to ask how much the disconnetion of the engine breather influences the jetting?
I noticed a noticeable changing in idle speed - can be set easy to "correct" again.
How big is the affect on the other carb-circuts?
Anydody ever checked this(Taffy)?

Regards
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January 14th, 2008, 12:56 PM   #2
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RE: Jetting change with disconnetion of the engine breather?

IMHO it has nowt to do with carburation. you have simply altered the backpressure etc. so just adjust the idle.

BTW, one of your countrymen (drehwurm -mikael petkov) is building me a bleed system for shock absorbers.

regards

Taffy
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January 15th, 2008, 09:47 AM   #3
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RE: Jetting change with disconnetion of the engine breather?

Hi Taffy,

Austria is indeed a small country, but neverless: who is Mikael Petkov?
Never ever heard of him?! Where´s his location or shop? - but, hey I can´t know everyone...
There´s only one suspension-guy in Austria that I would recomend :
Chris Irod (he works for Öhlins-Factory in WSB & WSS)

Thanks for your feedback on my question.
I´m very well aware of your expertise and experience, so I asume you´re right - as you´ve tested it?

But isn´t the backpressure created with air that has been sucked through the carb and then enters engine-internals?
So, in (my) theory the backpressure is a mixture of (hot) air, fuel fumes (burned & unburned )oil & some exhaust-gases ->
that get´s sucked (sorry - pumped) into the engine again?
disconnect it, and no change at all (expect loosing/missing the backpressure)
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January 15th, 2008, 01:01 PM   #4
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RE: Jetting change with disconnetion of the engine breather?

you are venting the crankcase better i guess and there is less case pressure stopping the piston going down. drehwurm is his nik on ktmtalk.com and he's from vienna.

regards

Taffy
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breather, change, disconnetion, engine, jetting



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