Hard to start - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 13 (permalink) Old 01-27-2011, 10:29 PM Thread Starter
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Hard to start

I have a fairly new-to-me '94 750 with 13K miles on it. Ever since I've had it its been very hard to cold start. It had sat with bad gas in it so I have the carbs rebuilt. The bike runs much better now but the cold start problem isn't any better. Basically, if I use any choke at all it will not start and if I do get it started, adding choke will kill it. The only way to start it is to turn the idle up real high and keep the choke off. Once the bike warms up it runs well. I had the guy who rebuilt the carbs tune then.

What could need to be done to make it not so hard to start?

-Robert
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post #2 of 13 (permalink) Old 01-27-2011, 10:51 PM
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sounds like maybe the choke plungers are sticking or not adjusted tight enough ... i would take back to guy who did carbs and tell him to find and fix the problem (if you paid that is)

if not then you could just give me the bike and i will gladly ride it around lol

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post #3 of 13 (permalink) Old 01-27-2011, 11:22 PM Thread Starter
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Unfortunately I didn't have time to do it myself (I would have enjoyed it but was too busy). I paid full California retail for the work, $375.

-Robert
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post #4 of 13 (permalink) Old 01-27-2011, 11:28 PM Thread Starter
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I can see the right side plunger and it appears to move easily when the choke is used.

-Robert

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Originally Posted by Mazdaracer4fun View Post
sounds like maybe the choke plungers are sticking or not adjusted tight enough ... i would take back to guy who did carbs and tell him to find and fix the problem (if you paid that is)

if not then you could just give me the bike and i will gladly ride it around lol
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post #5 of 13 (permalink) Old 01-27-2011, 11:41 PM
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I discovered the best way to start mine when it's cold is to turn it over and the moment it tries to start, fully engage the choke. It fires right up and if I've adjusted the idle will continue to run. If I try to choke it once it's running, it will die.

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 #6 of 13 (permalink) Old 01-28-2011, 09:57 PM Thread Starter
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The carb clearly isn't correct. Even when I do get it started cold it crackles and pops all the time. Once its warm it run ok (not great) but if you shut it down you can't get it to start again. I'll take it back to the shop that rebuilt the carb. Hopefully they can fix it. Otherwise I'm probably out another $300 or so.

If this fails; are there any resources online that anyone would recommend that I could mail my carbs off to and have them redone?

-Robert
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post #7 of 13 (permalink) Old 01-28-2011, 10:48 PM
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Yes: carbworx.com They charge around $40/cerb plus parts and shipping to clean and refurbish.

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 13 (permalink) Old 01-29-2011, 01:40 AM Thread Starter
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Has anyone on this list used carbworx and can attest to their quality?

-Robert

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Yes: carbworx.com They charge around $40/cerb plus parts and shipping to clean and refurbish.
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post #9 of 13 (permalink) Old 01-29-2011, 10:20 AM
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RG1, I think you'll find the following thread a decent answer to your last question...:

https://www.vn750.com/forum/showthrea...light=carbworx

'05 VN750



For other bike pix & mods, go to:
http://s1203.photobucket.com/albums/...k/VN750%20pix/
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post #10 of 13 (permalink) Old 02-01-2011, 01:40 PM Thread Starter
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This sux! Just got a call from the shop. They found that the plugs were fouled (duh) and are charging me to replace the plugs. The problem is that the plugs were brand new when I brought the bike to them to have the carbs rebuild last month. The few times in my life that I've taken any kind of vehicle to a shop they've always messed it up. I should have just done the carbs myself but didn't think I had the time. Now I'm into this more than $400 and I'll still end up having to send the carbs off to carbworx.com

-Robert
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