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Air bypass screw quick question.


arveno
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Hello everyone,

I have a quick question regarding the

Air bypass screw on the throttle bodies.

Screwing it in or out does it lean or enrich the mixture?

I did some search but couldn’t find the answer…

thank you 

M

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Don't know the V11, so it may be different on the Sporti and HiCam turning them clockwise closes them resulting in less air, so it would richen the mixture.

AFAIK they are marginal things anyway and won't have much effect on the mixture EXCEPT at idle where the engine isn't breathing much.

I've always understood that they are just used to balance up the TBs at tickover in case it's off a bit after you balance the butterflies at higher RPMs.

Sure somebody who knows the V11 and is more knowledgable than me will chip in to give you a definitive answer

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Thank you for your answer that’s what I was looking for .

is there a way to lean the mixture a little bit more ?

does the tps setting have something to do with the air fuel mixture?

Can the mixture be leaned a little playing with it ?

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1 minute ago, arveno said:

Thank you for your answer that’s what I was looking for .

is there a way to lean the mixture a little bit more ?

does the tps setting have something to do with the air fuel mixture?

Can the mixture be leaned a little playing with it ?

Those are good questions. Sounds like you feel your V11 is still running rich even after removing the TrickeryBox? What makes you think this is the case?

The TPS does not lean, richen, or benefit from "playing with it." (I tried that in the early days before the fine folks here patiently helped me understand what the TPS actually does.)

Have you performed the entire "Decent Tune-up" to establish a baseline? 

 

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Spark plugs are dark but not soaked dry black powdery .

and I can smell a little bit of gas in the oil . 
throttle bodies are balanced.

the tps is set at 154 ( to be precise)

I know it should be at 157 but I don’t think that’s the issue .

Valves are adjusted, I own others old guzzie and bmw I al familiar with valve adjustment.

I am running out of idea …

 

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4 hours ago, arveno said:

Spark plugs are dark but not soaked dry black powdery .

and I can smell a little bit of gas in the oil . 
throttle bodies are balanced.

the tps is set at 154 ( to be precise)

I know it should be at 157 but I don’t think that’s the issue .

Valves are adjusted, I own others old guzzie and bmw I al familiar with valve adjustment.

I am running out of idea …

 

Whats your CO set at?

Phil

 

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1 hour ago, Lucky Phil said:

Whats your CO set at?

Phil

 

I have no clue. ( first EFI bike ever…. I am kind of a dinosaur lol )

I have a laptop, what program do I download?

can you explain me how it’s done ?

thanks 

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1 minute ago, arveno said:

I have no clue. ( first EFI bike ever…. I am kind of a dinosaur lol )

I have a laptop, what program do I download?

can you explain me how it’s done ?

thanks 

You need Guzzidiag. Strap yourself in for some learnings and use a translator where necessary( these people invented it). No garbage about "I'm a luddite" and don't know computers. Neither did I and I'm conversant with it now. If you can't figure out Guzzidiag you may as well sell the bike, seriously. Without it it's maintenance with both hands tied behind your back.

http://www.guzzi-forum.de/Forum/index.php?topic=16809.0"

http://www.guzzi-forum.de/Forum/index.php?board=76.0

https://www.von-der-salierburg.de/download/GuzziDiag/

https://wildguzzi.com/forum/index.php?topic=96957.0

Phil

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12 minutes ago, Lucky Phil said:

You need Guzzidiag. Strap yourself in for some learnings and use a translator where necessary( these people invented it). No garbage about "I'm a luddite" and don't know computers. Neither did I and I'm conversant with it now. If you can't figure out Guzzidiag you may as well sell the bike, seriously. Without it it's maintenance with both hands tied behind your back.

http://www.guzzi-forum.de/Forum/index.php?topic=16809.0"

http://www.guzzi-forum.de/Forum/index.php?board=76.0

https://www.von-der-salierburg.de/download/GuzziDiag/

https://wildguzzi.com/forum/index.php?topic=96957.0

Phil

Ok good thank youVery much!!

appreciate a LOT your help.

let me download it and I see I also need to get two cables .

Report back as soon as I get everything 

thanks 

 

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Don't discount the possibility that it's run rich so long that your intake valves are so fouled they interfere with airflow and thus richen the mixture, particularly at low RPM. Run a pint of Marvel Mystery Oil through with a tank of gas and see if it doesn't help. In any case, it won't hurt- it will clean any deposits from the intake and combustion chamber.
It's very wise to familiarize yourself with the tuning software, but you can probably find someone locally who either knows it, or is familiar enough with other tuners to help out sufficiently.

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Before I Oder the wrong cable lol

could someone share an Amazon link with the  cable I need ?

I found some similar to the below

but doesn’t mention the FTDI chip

Thank you 

OBD2 KKL 16 pin to USB cable with the FTDI chip.

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Here is the direct link to the “Guzzi” cables.

https://www.lonelec.com/product/guzzidiag-3pin-interface-cable-kit/

All you have to do is choose an option for the cable to plug to your computer/tablet/phone. The original cables came with USB-A plug attached for standard PC connection. I’d go for that, you can always use an adapter if you want to plug into a tablet/phone.

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3 hours ago, Speedfrog said:

Here is the direct link to the “Guzzi” cables.

https://www.lonelec.com/product/guzzidiag-3pin-interface-cable-kit/

All you have to do is choose an option for the cable to plug to your computer/tablet/phone. The original cables came with USB-A plug attached for standard PC connection. I’d go for that, you can always use an adapter if you want to plug into a tablet/phone.

Thanks, @Speedfrog!  I removed the link I posted. I see they have superseded the secondary cable with an adapter for cables to different devices. I have long wanted a dedicated "Tablet" or iPad to run guzzidiag when I am away from my home computer. Looks like this cabling is the way to go.

I will replace the link in the Diagnostic Cables topic in "How to . . ."

 

 

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only things come to mind is dirty air filter but im sure you checked that

maybe run a couple of tanks of fuel with high dose of Techron and wring its neck to clear things out 

 

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