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Carbs and Fuel System
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post #1 of 20 (permalink) Old 08-17-2007, 12:28 PM Thread Starter
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still puzzled

i have a 93 vuclan, i am still having problems with carbs. the left side or rear carb cuts in and out when running in 5th gear around 4000 rpm ( 55-60 mph ) it clears up if i run full choke, so it is starving for fuel.stumbles if I give light throttle, responds good to hard throttle. also, the same carb backfires like a cannon on deceleration, shoots blue flame out of the pipe ( unless I have choke on ) I have coastered that side. But still backfires. I have v/h cruisers, bike ran good until i had the carbs rebuilt. i have seafoamed it 6 or 7 times, no help. i know i have babbled on, but I cannot find a vacum hose that goes to either ear? I found one on the rear carb that runs down by the battery. any advise? or does anyone know a GOOD mechanic in the Lakeland, Fl. area, or hey anyone want to buy a vulcan?
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post #2 of 20 (permalink) Old 08-17-2007, 02:19 PM
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Sounds like you got some crud plugging a jet.
HAve you tried to use Sea Foam? It is great stuff.

Chad Falstad "Hawk"
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2001 Nomad 1500 Sold March 2012
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post #3 of 20 (permalink) Old 08-17-2007, 05:03 PM
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I'd second Chad, 'cept it sounds like you've Seafoamed 'em to death, with no positive change. Funny how these things keep happening after someone's had his/her carbs rebuilt. Are you comfortable pullling 'em yourself? You may actually just need to hand-clean the jets.

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post #4 of 20 (permalink) Old 08-18-2007, 09:27 AM Thread Starter
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I have considered pulling them myself, i bought a haynes manual. I don't really know anything about carbs. I have taken it back to the shop that rebuilt the card several times, they don't have a clue. Is this something that a mediocre mechanic ( me ) should be able to do? and yes, I have seafoamed it to death !!
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post #5 of 20 (permalink) Old 08-18-2007, 10:26 AM
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Quote:
Originally Posted by jprather View Post
I have considered pulling them myself, i bought a haynes manual. I don't really know anything about carbs. I have taken it back to the shop that rebuilt the card several times, they don't have a clue. Is this something that a mediocre mechanic ( me ) should be able to do? and yes, I have seafoamed it to death !!
"You can do it; we can help!" Absolutely, between the manual and the folks here, you can do just as well as the shop folks...certainly no worse, since the bike's not running right as it is. It really does sound like a plugged jet, but maybe a few more folks can weigh in before you start disassembling things.

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post #6 of 20 (permalink) Old 08-18-2007, 12:57 PM
 
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Check the boots between the carbs and cylinders. There are little nipples that stick up on both and they need to line up.
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post #7 of 20 (permalink) Old 08-20-2007, 08:55 AM Thread Starter
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should i be able to see the " nipples" with out removing the carbs?
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post #8 of 20 (permalink) Old 08-20-2007, 11:10 AM
 
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Do u still have the air plenum? It makes it a little harder to see. The nipple sit in the middle and on top of the boots.
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post #9 of 20 (permalink) Old 08-20-2007, 11:13 AM Thread Starter
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is that the air box?
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post #10 of 20 (permalink) Old 08-22-2007, 09:01 AM Thread Starter
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well, i'm gonna try to pull the carbs this week end. wish me luck and be prepared for a lot of questions !!!

Don, I don't mean to sound stupid, but i wasn't sure of what you where referring to.
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