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Carbs and Fuel System
From the gas tank to the carbs
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post #1 of 6 (permalink) Old 04-09-2010, 08:31 PM Thread Starter
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Surging

Just got the bike back from being tuned. But when going it kinda feels like the bike is puttering along, then it will smooth out. Any idea what this could be? I did the ear shave and re-jetted 140# front and 142# rear. Or at least I hopefully did that correctly. Another thing is I hear kinda of a pooping sound near im thinking the reed system. When I coastered them I ruined the stock gasket so I used the inside piece as the spacer then the coaster and used copper rtv on both sides. Should I just redo this again with the stock gaskets?

1992 Vulcan 750.
Ear shaved and re-jetted.
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post #2 of 6 (permalink) Old 04-09-2010, 08:36 PM
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Sounds like the vent hose that "t"s off the carbs is catching air. That hose needs to be where the wind can't cause air pressure flacuation. The best place is to put it up under the fuel tank.

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post #3 of 6 (permalink) Old 04-09-2010, 08:50 PM Thread Starter
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I have that filter in the same location as air suction system was... all lines are on tight. I think I moved the hoses around on the t, but that shouldn't matter as lone as its two lines and a vent filter.

1992 Vulcan 750.
Ear shaved and re-jetted.

Last edited by theone2043; 04-09-2010 at 08:52 PM.
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post #4 of 6 (permalink) Old 04-09-2010, 09:38 PM
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I had that line off the other day, and just by moving my leg close to the bike and away from it would cause the bike to surge. I reconnected it to the ear and all is well.

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post #5 of 6 (permalink) Old 04-09-2010, 11:39 PM
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Quote:
Originally Posted by theone2043 View Post
Just got the bike back from being tuned. But when going it kinda feels like the bike is puttering along, then it will smooth out. Any idea what this could be? I did the ear shave and re-jetted 140# front and 142# rear. Or at least I hopefully did that correctly. Another thing is I hear kinda of a pooping sound near im thinking the reed system. When I coastered them I ruined the stock gasket so I used the inside piece as the spacer then the coaster and used copper rtv on both sides. Should I just redo this again with the stock gaskets?
Did you shim the needles?
What pilot jets did you install?
Where are the pilot screws set?


85 VN700 "Old Yella"

REBUILT ENGINE
CUSTOM PAINT
VANCE & HINES CRUZERS
EAR SHAVED AND RE-JETTED W/K&N'S
DUNLOP ELITE K591 FRONT & REAR
VOLTMETER
SYNTHETIC BRAKE FLUID
SYNTHETIC OIL & GEAR LUBE
PLEXISTAR 2 WINDSHIELD
SPLINES LUBED
ACCT'S GREASED W/TOC SPRINGS
COASTERD
LEATHER SADDLE BAGS
LEATHER TOOL AND ROLL BAG
PICKUP COILS GAPPED AT .018"
NGK CAP, WIRES, IRIDUMS
BARNETT FRICTION PLATES & SPRINGS
CUSTOM GRIPS, MIRRORS, LEVERS
ORIGINAL STATOR & R/R 14.5v
DEKA MF AGM ETX15L

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post #6 of 6 (permalink) Old 04-10-2010, 07:49 AM Thread Starter
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Yes the needles are shimmed, or at least my friend told me they were. Pilots jets are both 40#. As far as the screws set I have no idea.

1992 Vulcan 750.
Ear shaved and re-jetted.
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