right side pipe is chugging a bit?? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 12 (permalink) Old 07-29-2011, 02:11 AM Thread Starter
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right side pipe is chugging a bit??

ok when at a idle my right side exhaust pipe is kinda blubering a bit when the left is a constant rumble

almost sounds like the front cyl is either missing or got too much fuel not sure which

it sounds fine to me going down the road but then again its de goated and one side might be drowning out the other

i have ran the air mix screw on the left side all the way in and then out to 4 turns and it still does it it should be the same on both pipes right?

http://map.vulcan750.net/

VROC# 33976
1994 VN750

MODS SO FAR:
honda shadow 750 sissybar
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post #2 of 12 (permalink) Old 07-29-2011, 10:38 PM Thread Starter
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nobody has any ideas?? really??

http://map.vulcan750.net/

VROC# 33976
1994 VN750

MODS SO FAR:
honda shadow 750 sissybar
ear shaved, K&N pods
142/42 jets, Cobra pipes
oversized tires, vn800 seat
vn750 rad cover, Tank bib
custom mirrors, gel battery
led dash lights, led tail light
led plate light, chrome levers
horn relocation, custom voltmeter
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post #3 of 12 (permalink) Old 07-30-2011, 12:03 AM
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4 turns out on those idle mix screws is too much in my opinion. Should be 2.5 to start with then make very small adjustments from there. I'm talkin 1/4 - 1/2 turn and wait a couple of seconds for change then another 1/4 - 1/2. I got mine to idle beautifully by going slowly with the adjustments. I'm probably at around 2 3/4 on one and 3 on the other but I also changed my jets. If you're running the stock air cleaners (ears) then yours would probably be a little less. You asked if they should be the same...They don't need to be exact but they should be fairly close on an engine in decent condition.

Sometimes people run the idle too low on these v twins because they sound cool but they're not designed to idle low. Oil pressure will suffer and it won't charge right. May even foul up a bit if too long, like if you're in traffic a lot. They're supposed to idle at 1100. Just putting it out there in case, since you haven't had it long.

When it's idling does it smell if you stand behind it? That's a good indication that it's rich. Hope this helps. Update when you can.
Dave

Last edited by DavesVulster; 07-30-2011 at 12:09 AM.
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post #4 of 12 (permalink) Old 07-30-2011, 02:23 AM
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Check the balancing of the carburetors. It may idle almost entirely on the rear cylinder.
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post #5 of 12 (permalink) Old 07-30-2011, 08:45 AM Thread Starter
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how do i check the carb balance

http://map.vulcan750.net/

VROC# 33976
1994 VN750

MODS SO FAR:
honda shadow 750 sissybar
ear shaved, K&N pods
142/42 jets, Cobra pipes
oversized tires, vn800 seat
vn750 rad cover, Tank bib
custom mirrors, gel battery
led dash lights, led tail light
led plate light, chrome levers
horn relocation, custom voltmeter
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post #6 of 12 (permalink) Old 07-30-2011, 01:06 PM
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Quote:
Originally Posted by Tofer76 View Post
how do i check the carb balance
How to sync carbs from Vulcan Verses:
https://www.vn750.com/forum/showthread.php?t=1084

How to build an inexpensive manometer/carb sync tool:
https://www.vn750.com/photopost/showp...o=2399&cat=657

Gordon

1991 VN 750 -"Cosmic Lady" or "Bad Girl"?
Purchased May 16, 2008
Approx.19,300km (12,000 miles)

H-D windshield
Relocated R/R
MF-AGM battery
Fiamm Freeway Blaster horns
F&S luggage rack and engine guard
Kury Offset Hiway pegs
July 13, 2016, Riding on the DARKSIDE now, Classic Radial 165/80-15


TOP TEN THINGS A NEW RIDER/OWNER SHOULD DO. Click on link.
https://www.vn750.com/forum/11-vn750-general-discussion/9127-top-ten-items-you-would-suggest-new-owner-do-his-new-ride.html

Last edited by OlHossCanada; 07-30-2011 at 01:10 PM.
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post #7 of 12 (permalink) Old 07-30-2011, 02:10 PM
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At a glance, sounds like your idle jet may be clogged a little on that side. Have you been running seafoam?

Fergy
Kyle, TX VN750.com member #707 VROC#19556
2002 VN1500 Classic
Spline Lube Procedure, with photos, R/R Relocation and Coil Mod
Rusty Tank Cleaning!
Electrical Fault Finding Flowchart
SEAFOAM JUNKIE!


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post #8 of 12 (permalink) Old 07-30-2011, 02:31 PM Thread Starter
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no seafoam i have some tho how much per tank

http://map.vulcan750.net/

VROC# 33976
1994 VN750

MODS SO FAR:
honda shadow 750 sissybar
ear shaved, K&N pods
142/42 jets, Cobra pipes
oversized tires, vn800 seat
vn750 rad cover, Tank bib
custom mirrors, gel battery
led dash lights, led tail light
led plate light, chrome levers
horn relocation, custom voltmeter
Tofer76 is offline  
post #9 of 12 (permalink) Old 07-30-2011, 05:48 PM
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For this issue I'd try and fill the carbs with straight seafoam and let it sit at least a day or two. You can pull off the fuel hoses from the petcock and load the carbs from there. That's what I'd do. Once you've done that you can drain the carbs from the drain screws on the bottom of the bowls, then button things back up and put about 1/3 or 1/2 a can of seafoam in the tank of gas and ride it like you stole it for a day or so and about 90% of the time it will be fixed. The other 10% have to pull the carbs and clean them.

As a preventative measure, about once a month I put some seafoam in a full tank of gas on my bike, about 2-3 oz. I keep a bottle in my saddlebag so it is always around. It's great stuff. There's another thread on here right now talking about the miracle of seafoam. Check it out here.

Fergy
Kyle, TX VN750.com member #707 VROC#19556
2002 VN1500 Classic
Spline Lube Procedure, with photos, R/R Relocation and Coil Mod
Rusty Tank Cleaning!
Electrical Fault Finding Flowchart
SEAFOAM JUNKIE!


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post #10 of 12 (permalink) Old 08-08-2011, 02:46 AM
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Hi Tofer76,

I have a similar issue and have been following this thread...so where did things end-up with this problem? Did you get it straightened out? If so, what worked for you?

Best Regards,
Chris

Arvada, CO
VROC No. 7348

1986 VN 750 Ebony
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