Engine stalls under load - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 10 (permalink) Old 11-07-2009, 06:59 AM Thread Starter
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Engine stalls under load

I have a '90 vn750 with just over 15k miles. She's been marbled to help with the popping on decel. I have also adjusted the A/F screws out to 2 1/2 turns. This seemed to help with the popping on decel. I read on here about seafoam, so I'm running some through now. Yesterday morning when I was warming her up to go to work. Idling great purring like a kitten.......when I get ready to take off for work. As soon I let out on the clutch it dies. I tried it with the choke on.....choke off......tached up to 5k still the same thing. I've pulled the carbs, so far they don't look that bad. some black residue in the throat around the butterfly. Nothing loose or hardly any varnish.

HELP!

P.S. it was 38 degrees.....not sure if that means anything.

Thanks,
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post #2 of 10 (permalink) Old 11-07-2009, 07:42 AM
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Check your side stand switch, it may be sticking due to the cold weather. If it is stuck it will cut your ignition as soon as you let out the clutch.


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post #3 of 10 (permalink) Old 11-07-2009, 01:11 PM
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I had the same issue with mine. I just pulled the rubber boot off of the kick stand switch and hit it really good with some WD-40. Fixed'r up real good. Just use some WD-40 and spray the switch while pushing it in and out until it feels like its moving freely. You'll want to use a piece of cloth or something on your hands to help push it in because its a firm switch.


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post #4 of 10 (permalink) Old 11-07-2009, 10:05 PM Thread Starter
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Thanks guys.......I checked the out the switch and found the 2 prong connection was unhooked. Now since I have the carb's out I need to figure out if I want to do anything to them.


Thanks again.
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post #5 of 10 (permalink) Old 11-07-2009, 11:41 PM
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Quote:
Originally Posted by fred View Post
Thanks guys.......I checked the out the switch and found the 2 prong connection was unhooked. Now since I have the carb's out I need to figure out if I want to do anything to them.


Thanks again.
Were you having carb related issues? If you want to spend the $, suppose you could replace the rubber parts that tend to deteriorate over time. Otherwise, I'd slap them back in and call it done.

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
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post #6 of 10 (permalink) Old 11-08-2009, 05:32 PM Thread Starter
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Where is a good place to get replacement parts? I know of bikebandit....
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post #7 of 10 (permalink) Old 11-08-2009, 09:14 PM
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cheapcycleparts.com

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
_____________________________________________
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
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post #8 of 10 (permalink) Old 11-09-2009, 10:09 AM
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Not to beat you up in public, but this is a good example of poor troubleshooting! Start with the simple things. Of course, an earlier thread explaining the issue before you removed the carbs would have done fine! First thing I thought when reading your post was SIDE STAND SWITCH! Oh well, I am really sorry you went through the trouble of removing your carbs. If the bike was running good before, I would just slap them back on and ride.
Look at it this way though, you have pulled your carbs, and many are scared to death of the thought of having to pull them. You are past that. There isn't any maintenance on this bike that should scare you from now on!

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post #9 of 10 (permalink) Old 11-09-2009, 03:08 PM
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Hey fred are you good with carbs? My bike is still down due to needing the carbs cleaned, but I am going to just purchase the parts to do an ear shave on it, are you thinking about doing the same thing?

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post #10 of 10 (permalink) Old 11-09-2009, 05:50 PM Thread Starter
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No problem Fergy (Happy Birthday!). I'm kicking my own ass for not posting first..... And you're right about now being afraid to do any work on our bikes. (I keep a camera handy and take plenty of pictures) the memory isn't as good as it use to be.

Mellow.....I wouldn't consider myself good with carb's but they aren't that hard to clean. They are kind of a pain to get off. I was debating the ear shave.....not sure If I like the look. I'm definately taking the epa crap off.
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