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 Carb adjusts diff. between the two
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Joined: Sep 2008
Posts: 242
Adjunct
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OP
Adjunct
Joined: Sep 2008
Posts: 242 |
I've been adjusting my carbs with an air/fuel sensor installed in each header.
In order to get the same numbers on each carb i have to have the needles at 3/4 turn and 1 1/2 turn.
Does anyone know whats going on here?
Thanks,,,
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Re: Carb adjusts diff. between the two
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Joined: Feb 2007
Posts: 23,194 Likes: 56
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,194 Likes: 56 |
I have seen differences between carbs but that seems like a lot to me. I have seen 1/4 to 1/2 turn differences but no more than that. When was the last time you synced them? If 1 butterfly is letting more air/fuel in than the other it could throw off the mixture screw settings, especially if doing it with a gauge. Vacuum leaks will do it too.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: Carb adjusts diff. between the two
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Joined: Jan 2005
Posts: 2,664
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 2,664 |
When I first got my America, the left carb(sitting on it) was 1.75 turns out and right carb was screwed closed. The dealer said it was good. I opened them anyway to 3 & 2 turns. Then the Dyno was good, but they only checked the right carb.
Ride Safe,
Dennis
Triumph, it's how I live and what I ride.
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Re: Carb adjusts diff. between the two
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Joined: Apr 2007
Posts: 3,061 Likes: 8
Loquacious
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Loquacious
Joined: Apr 2007
Posts: 3,061 Likes: 8 |
Quote:
I have seen differences between carbs but that seems like a lot to me. I have seen 1/4 to 1/2 turn differences but no more than that. When was the last time you synced them? If 1 butterfly is letting more air/fuel in than the other it could throw off the mixture screw settings, especially if doing it with a gauge. Vacuum leaks will do it too.
+1 
12 Rocket Roadster
03 Bonneville America
69 BSA Firebird Scrambler
73 Yamaha TX 750
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Re: Carb adjusts diff. between the two
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Joined: Sep 2008
Posts: 242
Adjunct
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OP
Adjunct
Joined: Sep 2008
Posts: 242 |
Hey thanks,,,its been a whole season since i've done it. Will do!
My brain has been churning on this,,,,would valve gap create this issue? ie: not open long enough so increased needle adjustment to compensate?
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