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Damn air screws!
- TeK9iNe
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14 Sep 2008 11:07 - 14 Sep 2008 11:08 #237107
by TeK9iNe
Motorcycle Shop Owner/Operator
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors
Damn air screws! was created by TeK9iNe
Got my 81 KZ1000 CSR up and running now. I plan on being out on the street tomorow.
Here's the problem... I want to Sync the carbs. Which I can do no problem, I have a good manometer.
But... I'm setting the air screws in my BS34's and I cant hear any change in rpm on the right side of the bike! i can hear the difference on the left side, then when I go over to the right, I cant make out any differences from #3 and #4 screws! i can bog the bike by setting them all the way in, or very far out. but in between, theres no (audible) change in sound.
What should I do? Whats going on? Is the right bank to far below sync from the left? Or something worse
Cheers!:S
Here's the problem... I want to Sync the carbs. Which I can do no problem, I have a good manometer.
But... I'm setting the air screws in my BS34's and I cant hear any change in rpm on the right side of the bike! i can hear the difference on the left side, then when I go over to the right, I cant make out any differences from #3 and #4 screws! i can bog the bike by setting them all the way in, or very far out. but in between, theres no (audible) change in sound.
What should I do? Whats going on? Is the right bank to far below sync from the left? Or something worse
Cheers!:S
Motorcycle Shop Owner/Operator
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors
Last edit: 14 Sep 2008 11:08 by TeK9iNe.
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- wiredgeorge
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14 Sep 2008 12:04 #237113
by wiredgeorge
wiredgeorge Motorcycle Carburetors
Mico TX
www.wgcarbs.com
Too many bikes to list!
Replied by wiredgeorge on topic Damn air screws!
Profanity is more or less wasted on inanimate objects. You don't have air screws on your carburetors; they are pilot mixture screws. They control both air and fuel. I suggest you turn them to 1 3/4 turns out from lightly seated. Turn each in turn back and forth about 1/4 turn for max rpm. If you get no change, turn them back to 1 3/4 turns out and don't worry about it.
wiredgeorge Motorcycle Carburetors
Mico TX
www.wgcarbs.com
Too many bikes to list!
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- TeK9iNe
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14 Sep 2008 14:16 - 14 Sep 2008 14:28 #237126
by TeK9iNe
Motorcycle Shop Owner/Operator
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors
Replied by TeK9iNe on topic Damn air screws!
wiredgeorge wrote:
Ah, very informative! However... Due to my complacency... I forgot to mention that some time ago the PO re-jetted the bike and put a 4-1 Jardine high-flow system on.
The cyclinders will actually flood/bog if the mixture screws arent at least 2 1/2 turns out. Its kind of my starting point... :blush:
...but thanks Wiredgeorge, your a hero!
ALSO... you say "Pilot" Mixture Screws. So this would explain why the bike is a little rough to control with slight/slow ridin' throttle inputs, but anything after about 1/3 throttle is smooth and CRAZY fast!
I'm starting to get this stuff... :laugh:
You don't have air screws on your carburetors; they are pilot mixture screws. They control both air and fuel. I suggest you turn them to 1 3/4 turns out from lightly seated. Turn each in turn back and forth about 1/4 turn for max rpm. If you get no change, turn them back to 1 3/4 turns out and don't worry about it.
Ah, very informative! However... Due to my complacency... I forgot to mention that some time ago the PO re-jetted the bike and put a 4-1 Jardine high-flow system on.
The cyclinders will actually flood/bog if the mixture screws arent at least 2 1/2 turns out. Its kind of my starting point... :blush:
...but thanks Wiredgeorge, your a hero!
ALSO... you say "Pilot" Mixture Screws. So this would explain why the bike is a little rough to control with slight/slow ridin' throttle inputs, but anything after about 1/3 throttle is smooth and CRAZY fast!
I'm starting to get this stuff... :laugh:
Motorcycle Shop Owner/Operator
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors
Last edit: 14 Sep 2008 14:28 by TeK9iNe.
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