Cranking but wont catch - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Carbs and Fuel System
From the gas tank to the carbs
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post #1 of 7 (permalink) Old 01-29-2011, 05:02 PM Thread Starter
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Cranking but wont catch

I had to let my bike sit for a good 6 weeks. I winterized it and everything. I decided today to bring it back to life so I drained the tank/carbs. Refilled with fresh gas. Battery back in and everything. Now it wont start.

It cranks and cranks and cranks, but wont catch at all. All the fuel lines are new with fresh gas and the petcock to ON. I am getting spark on all 4 plugs.


Any ideas?

Jamie
Springfield, MO
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VROC Member # 31562
2004 Vulcan 750
18,000 miles and counting...
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post #2 of 7 (permalink) Old 01-29-2011, 06:26 PM
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Is the vacuum line hooked up and not cracked?
Are you actually getting gas flow to the carbs?

Not sure why you drained the carbs and tank after only 6 weeks though.
I started my bike last summer with Seafoam treated gas that has been in the tank for 2 years.

Gordon

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Purchased May 16, 2008
Approx.19,300km (12,000 miles)

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Last edited by OlHossCanada; 01-29-2011 at 06:31 PM.
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post #3 of 7 (permalink) Old 01-30-2011, 06:45 AM
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Try setting the petcock to PRI, and wait a minute or so. When you drained the carbs, it takes a few minutes of cranking to get fuel to the carbs.
Give that a try.
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post #4 of 7 (permalink) Old 01-30-2011, 09:34 AM
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Not sure which model year he has, but only the first few had the PRIme setting. After that it was ON, RES and OFF.

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
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post #5 of 7 (permalink) Old 01-30-2011, 02:55 PM
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Quote:
Originally Posted by flitecontrol View Post
Not sure which model year he has, but only the first few had the PRIme setting. After that it was ON, RES and OFF.
His sigline now says he rides a 2004 model (the sigline may have been there at the time the OP was made, I do not recall) so you are right that he has no PRIME position on the petcock valve.

I still do not understand why he would feel the need to drain the gas from the tank and carbs after only a 6 week *winter* storage period.

In his situation, I would have at least tried to start the engine before draining the gas.

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/showthread.php?t=9127

Last edited by OlHossCanada; 01-30-2011 at 02:58 PM.
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post #6 of 7 (permalink) Old 01-31-2011, 05:37 AM
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My apologies to all, I didn't realize they didn't have the PRIme on the newer bikes. I thought it was a good idea IMO but I guess they (the manufacturer) felt it wasn't necessary.
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post #7 of 7 (permalink) Old 01-31-2011, 05:38 PM Thread Starter
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Back to Life!

Thank you everyone. I got it running finally. The vac line had a small hole in the rubber near where it connects to the nipple. Replaced the line and all is well!!



Quote:
Originally Posted by OlHossCanada View Post
I still do not understand why he would feel the need to drain the gas from the tank and carbs after only a 6 week *winter* storage period.

In his situation, I would have at least tried to start the engine before draining the gas.


I drained the tank because last summer I had a Ninja whose carbs got gummed up bad because I started it with the old gas in there. Crap settled to tbe bottom of the tank and went straight to the carbs. I just rather be safe than sorry. The carbs on the Vulcan are a pain

Jamie
Springfield, MO
VN750.com Member #7216
VROC Member # 31562
2004 Vulcan 750
18,000 miles and counting...
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