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Sun Aug 23, 2009 12:10 pm

El Macho
KTM Super Duke 1290, Vespa GTS 300
Joined: 27 Oct 2006
Posts: 9022
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El Macho
KTM Super Duke 1290, Vespa GTS 300
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Location: Belfast Metropolitan Area
Sun Aug 23, 2009 12:10 pm linkquote
Created article Carburettor Mixture Adjustment

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Sun Aug 23, 2009 3:09 pm

Moderator
2010 Dragon Red GTS 300 Super, 2018 Grigio Titanio Piaggio Liberty S 150
Joined: 11 Jul 2006
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Location: Toronto, Canada, Fort Lauderdale, Florida
 
Moderator
2010 Dragon Red GTS 300 Super, 2018 Grigio Titanio Piaggio Liberty S 150
Joined: 11 Jul 2006
Posts: 16293
Location: Toronto, Canada, Fort Lauderdale, Florida
Sun Aug 23, 2009 3:09 pm linkquote
Nice work Doug, that will come in handy for quite a few people.
Sun Aug 30, 2009 9:58 am

Gobshite Shiva
Kymco Downtown 300i the 'Dolphin Noise'
Joined: 16 Mar 2007
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Location: London UK
 
Gobshite Shiva
Kymco Downtown 300i the 'Dolphin Noise'
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Sun Aug 30, 2009 9:58 am linkquote
can you clarify what you mean by 'fastest possible idle'? will the idle go up to a certain point and not beyond, and any given mixture ratio?
Sun Aug 30, 2009 10:03 am

El Macho
KTM Super Duke 1290, Vespa GTS 300
Joined: 27 Oct 2006
Posts: 9022
Location: Belfast Metropolitan Area
 
El Macho
KTM Super Duke 1290, Vespa GTS 300
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Posts: 9022
Location: Belfast Metropolitan Area
Sun Aug 30, 2009 10:03 am linkquote
genie wrote:
can you clarify what you mean by 'fastest possible idle'? will the idle go up to a certain point and not beyond, and any given mixture ratio?
Yes. When you weaken the mixture, the idle will slow. If you go too rich it will slow again. Somewhere in the middle it will be at its fastest. That's where you want it. I've added this information to the original article.
Sun Sep 20, 2009 6:41 am

Hooked
GTV 250 ie Navy Gilera Runner VXR200 Yamaha Fino Sport
Joined: 06 Sep 2009
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Hooked
GTV 250 ie Navy Gilera Runner VXR200 Yamaha Fino Sport
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Sun Sep 20, 2009 6:41 am linkquote
it mentiones that "when you turn the screw in( i presume its clockwise?) you are making it lean" but isnt turning it in clockwise killing off the air therefore making it rich?
Sun Sep 20, 2009 10:47 am

El Macho
KTM Super Duke 1290, Vespa GTS 300
Joined: 27 Oct 2006
Posts: 9022
Location: Belfast Metropolitan Area
 
El Macho
KTM Super Duke 1290, Vespa GTS 300
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Posts: 9022
Location: Belfast Metropolitan Area
Sun Sep 20, 2009 10:47 am linkquote
It depends whether the mix screw controls the air or the fuel. On these modern Constant Vacuum carbs it controls the fuel. The more you loosen it the more fuel gets in, richening the mixture. That's counter clockwise to loosen!
Mon Sep 21, 2009 12:31 am

Hooked
GTV 250 ie Navy Gilera Runner VXR200 Yamaha Fino Sport
Joined: 06 Sep 2009
Posts: 112
Location: all over
 
Hooked
GTV 250 ie Navy Gilera Runner VXR200 Yamaha Fino Sport
Joined: 06 Sep 2009
Posts: 112
Location: all over
Mon Sep 21, 2009 12:31 am linkquote
i see...with the gt200/or the gileravxr200 (i understand them to have the same engine) is it confirmed that the a/f screw controls the fuel and not the airflow? thanks!
Wed Sep 23, 2009 3:44 pm

Resident Gentleman
--------2008 LX150-------- Sold
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Resident Gentleman
--------2008 LX150-------- Sold
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Posts: 5045
Location: Brady, TX
Wed Sep 23, 2009 3:44 pm linkquote
Updated the link for the adjusting tool.
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Thu Aug 26, 2021 5:38 pm

Petty Tyrant
0:7
Joined: 11 Oct 2005
Posts: 32202
Location: Bay Area, California
 
Petty Tyrant
0:7
Joined: 11 Oct 2005
Posts: 32202
Location: Bay Area, California
Thu Aug 26, 2021 5:38 pm linkquote
Updated the image location of one of the images (the only one that actually resides on MV servers) and pointed at a new image of the Carb D tool at scooterwest.com.
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