Low warm up idle while on side stand - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 7 (permalink) Old 08-02-2010, 04:14 PM Thread Starter
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Low warm up idle while on side stand

Cold start the bike and put it on the side stand to warm up, give her 50% choke and she idles at about 1500 rpm, after a minute or two I sit on her and bring it upright she roars up to about 2000 rpm, I am not touching the choke or the throttle.

It doesn't do this if I warm it up on center stand.

Is this a common issue? My thoughts are it is a float bowl issue, but the bike runs fine, and does not have any power issues.

1993 Vulcan 750 - SOLD
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1996 Suzuki Bandit 600 - Current ride
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post #2 of 7 (permalink) Old 08-02-2010, 04:53 PM
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My 93' does the same thing. Its got 43k on it and never done the carbs. I know that I have to take the carbs apart for a good cleaning tho. Someone else might have the answer.

01' VN750
Jardine cross over exaust
Kyriakin grips and foot pegs
Modified seat and backrest
Windshield
Luggage rack
Crash bar with Kyriakin pegs and extensions
Kumho 758 165/80-15 CT rear Dunlop 404 110/90-19 front
Coastered and air/fuel screws at 2.5 turns
Spline lube

93' VN750 getting TLC
Decals and mirrors
Coastered and air/fuel screws at 2.5 turns
ACCTs to MCCTs
Degoated with Harley mufflers
Duro 110-90-19 front 150-90-15 rear
Pick-up coils at .020
Spline lube
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post #3 of 7 (permalink) Old 08-02-2010, 05:10 PM Thread Starter
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I just did get my carbs rebuilt this past spring, she runs like a top with no power loss issues. If anything it seems like it might be the back cylinder might not be firing as it should, maybe a lack of gas to that right hand carb? On the side stand she is at a pretty good lean to the left side.

1993 Vulcan 750 - SOLD
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1996 Suzuki Bandit 600 - Current ride
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post #4 of 7 (permalink) Old 08-02-2010, 05:13 PM
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Mine does it even when warm. I know I need a couple carb boots as well. That is why I'm running my 01' more.

01' VN750
Jardine cross over exaust
Kyriakin grips and foot pegs
Modified seat and backrest
Windshield
Luggage rack
Crash bar with Kyriakin pegs and extensions
Kumho 758 165/80-15 CT rear Dunlop 404 110/90-19 front
Coastered and air/fuel screws at 2.5 turns
Spline lube

93' VN750 getting TLC
Decals and mirrors
Coastered and air/fuel screws at 2.5 turns
ACCTs to MCCTs
Degoated with Harley mufflers
Duro 110-90-19 front 150-90-15 rear
Pick-up coils at .020
Spline lube
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post #5 of 7 (permalink) Old 08-02-2010, 11:47 PM
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When you have it on the side stand is your front wheel turned? If it is it can pull on the choke cable..
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post #6 of 7 (permalink) Old 08-05-2010, 05:07 PM Thread Starter
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I checked the choke cable and it is not pulling, I tried it with the wheel straight and got the same results.

1993 Vulcan 750 - SOLD
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1996 Suzuki Bandit 600 - Current ride
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post #7 of 7 (permalink) Old 08-05-2010, 05:32 PM
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I hate to say it, but this looks like a good time to use Seafoam, Staybil, or whatever your favorite fuel additive is.
Just for giggles, when it is cold, lean it over to the right, having somebody suport it, start it with the choke, and see if it replicates the problem. If it doesn't, then I would suspect a float sticking on one side only. If it does replicate the problem, I have no idea, unless it is the initank fuel filter covering and uncovering with sludge.


Jim
'95 Kawasaki Concours

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Last edited by jimkonst; 08-05-2010 at 05:35 PM.
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