Hard to start after bike has sat....??? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 10 (permalink) Old 01-18-2011, 09:01 PM Thread Starter
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Hard to start after bike has sat....???

any reasons why after 2 weeks my bike is hard to start???? takes forever to get it fired up, but after it does its fine as long as i fire it up once every 3 days or so.

??? anyone?

do i have it set to rich?

Will
440-341-7755

1994 VN750
HAS VERY CLEAN carbs! lol so i know thats not the issue.

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post #2 of 10 (permalink) Old 01-18-2011, 09:21 PM
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Have you checked the petcock? If it's leaking a bit, it might be flooding the carbs after a certain time.

Mine did this and the petcock was letting gas into the carbs even when it was off. It happened faster for me, but maybe yours has a smaller leak/is letting fewer gas in.

Just something to look into, just in case.

Also might be the battery. Even if the voltage checks out ok, on those days that it's hard to start, jump it with a car battery (with the car OFF), and see if it starts better.
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post #3 of 10 (permalink) Old 01-18-2011, 09:29 PM Thread Starter
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i do need to rebuild the petcock... any leads on a new rebuild kit?

also i have a battery maintainer (sorry if mispelled)

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post #4 of 10 (permalink) Old 01-18-2011, 09:38 PM
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Well, I said to try another battery anyway because I've had a battery once before that showed good voltage but still didn't work right... voltage was right, but wasn't putting out enough amps.

I dunno about other places, but Ive seen petcock rebuild kits on ebay. Somebody else here might know of other places though.
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post #5 of 10 (permalink) Old 01-18-2011, 10:48 PM
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Quote:
Originally Posted by Mazdaracer4fun View Post
i do need to rebuild the petcock... any leads on a new rebuild kit?
Here: http://motors.shop.ebay.com/Motorcyc...0Type=Petcocks

Gordon

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

H-D windshield
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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

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post #6 of 10 (permalink) Old 01-18-2011, 11:13 PM
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Random shot- I had that issue until I finally got around to grabbing a lower weight oil and putting it in there. 20w 50 was great for 90-100 degrees but gets cranky 40 and below. My fault was laziness.
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post #7 of 10 (permalink) Old 01-19-2011, 08:56 PM Thread Starter
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has new battery (amps and voltage is good)
and oil is 10w40 (what it calls for)

and it seems to flood out so imma rebuild the petcock and see if that cures it.

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post #8 of 10 (permalink) Old 01-19-2011, 09:06 PM
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From this thread... Might be something to look at.

https://www.vn750.com/forum/showthread.php?t=875

Hot start problems VN750 2002 12500 miles. Solution: There are 5 proposed fixes in the verses. I applied 4 of them in sequence as follows:
1) Installed new battery. Old battery was still in acceptable range but not knowing its exact age I chose to switch it out. Sealed type battery of course.
2) Relocated the Regulator/Rectifier to side(per Forum sketches/pictures)
3)Put in new Iridium plugs. $7 a piece from Advace Auto Parts
4)Adjusted the pickup coil gaps. The top coil was at .030 and the bottom was over .040...which was probably the culprit. This solved my problem.

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post #9 of 10 (permalink) Old 01-22-2011, 07:47 PM Thread Starter
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Quote:
Originally Posted by n2omike View Post
From this thread... Might be something to look at.

https://www.vn750.com/forum/showthread.php?t=875

Hot start problems VN750 2002 12500 miles. Solution: There are 5 proposed fixes in the verses. I applied 4 of them in sequence as follows:
1) Installed new battery. Old battery was still in acceptable range but not knowing its exact age I chose to switch it out. Sealed type battery of course.
2) Relocated the Regulator/Rectifier to side(per Forum sketches/pictures)
3)Put in new Iridium plugs. $7 a piece from Advace Auto Parts
4)Adjusted the pickup coil gaps. The top coil was at .030 and the bottom was over .040...which was probably the culprit. This solved my problem.
this would apply if my problem was a hard to start when "HOT" but its COLD and been a week or more of not running it thats the problem .. thanks for the link tho i will check it out and see what it might offer

Will H.

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post #10 of 10 (permalink) Old 02-07-2011, 08:00 PM Thread Starter
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UPDATE : after talking with "LANCE" aka Ron, (very insightful guy btw!) he recommended i try again after i heated up my garage before trying to fire it up and VOILA! fired Right up no hesitation. i do however have to rebuild the petcock as it leaks if i mess with the valve and going to get the NGK plugs he recommended i get for it.

will post the part # soon as i find the paper i wrote it on lol

Thanks a million Ron, i really thought cold air helped with combustion.. guess theres a fine line on what temp it goes the other way. hehe

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