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Valkyrie Riders Cruiser Club > General > 1500 Tech Board > carb sync
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Author Topic: carb sync  (Read 1970 times)
art
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Grants Pass,Or

Grants Pass,Or
« on: June 21, 2009, 05:35:53 PM »
I tried to sync.the carbs with a gage that I bought from harbor freight but the needle swings all over the place .the vac. is not steady  it  puffs air out then draws vac. so that I cannot get a reading.Any ideas on this ,has this been a problem with anyone else or is it normal? Art
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Dave Weaver
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Seymour, IN
« Reply #1 on: June 21, 2009, 05:48:24 PM »
It is normal, Art.  Take a pair of needle nose pliers or vise grips and squeeze some pressure on the vac. line below the gage until needle smooths out. 
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BamaJack
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McCalla, Alabama
« Reply #2 on: June 21, 2009, 06:44:51 PM »
Quote from: art on June 21, 2009, 05:35:53 PM
I tried to sync.the carbs with a gage that I bought from harbor freight but the needle swings all over the place .the vac. is not steady  it  puffs air out then draws vac. so that I cannot get a reading.Any ideas on this ,has this been a problem with anyone else or is it normal? Art

I use some valves from a fish tank in line. Start with the valve open and slowly close it until the gauge stops wagging. 
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Jack in Bama - vrcc#10322      Phyllis (PeeK) in Bama - vrcc#19668
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Ken Tarver
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North Mississippi
« Reply #3 on: June 21, 2009, 09:00:40 PM »
fold over your tubing and use a clothes pin and adjust till the needle stop twitching
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Patrick
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VRCC 4474

Largo Florida
« Reply #4 on: June 22, 2009, 03:45:45 AM »
What your seeing is normal and what the boyz told you is correct.. A vacuum gauge that has a damper screw slows the pulses in the same manner, it just pinches the tube.. You want to pinch the tube just so the needle wiggles a little bit..
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Dag
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« Reply #5 on: June 22, 2009, 05:05:29 AM »
Its not normal....
I have built several carb tune units and I have never had that problem.


All liquid filled vacuum gauges should have a rubber tip on top.
You have to either cut the tip or take the rubber top off when using the gauge.
« Last Edit: June 22, 2009, 05:18:33 AM by Dag » Logged
The question is not what you look at...but what you see...
art
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Grants Pass,Or

Grants Pass,Or
« Reply #6 on: June 22, 2009, 09:09:11 AM »
thanks I'll try that an see
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Ken Tarver
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North Mississippi
« Reply #7 on: June 22, 2009, 09:02:16 PM »
now look what you gone and done with that case! Now I see a rebuild here in the shop....I like it Dag, that is nice.

Ken
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