Fuel-System Re-assembly (plz help a newb) - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 29 (permalink) Old 04-03-2011, 01:38 PM Thread Starter
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Fuel-System Re-assembly (plz help a newb)

So my buddy helped me pull out can clean my carbs on my 97 NV750. Prior to that, I pulled my petcock, flushed the tank, and soaked the petcock in seafoam for quite a while. My (car) mechanic buddy helped get the carbs cleaned then back into the bike, but we found that we should have taken more pictures than we did (as is usually the case).

Currently I am at 2 roadblocks before i can get back to riding...

2 hoses.... no idea where they go...

One hose is the hose that splits off at a joint and goes to both of the carbs. I know the other 2 hoses form the carbs go straight to the petcock, but the third.. I have no idea.

The other hose is a small 4" hose that comes out of the center/bottom of the petcock, and I see nowhere for that to connect.


Hopefully I can get this figured out quickly and get my bike back together. Ive been waiting 2-3 weeks to finish this carb job and ride again!
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post #2 of 29 (permalink) Old 04-03-2011, 01:59 PM
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Quote:
Originally Posted by PhayzR View Post
So my buddy helped me pull out can clean my carbs on my 97 NV750. Prior to that, I pulled my petcock, flushed the tank, and soaked the petcock in seafoam for quite a while. My (car) mechanic buddy helped get the carbs cleaned then back into the bike, but we found that we should have taken more pictures than we did (as is usually the case).

Currently I am at 2 roadblocks before i can get back to riding...

2 hoses.... no idea where they go...

One hose is the hose that splits off at a joint and goes to both of the carbs. I know the other 2 hoses form the carbs go straight to the petcock, but the third.. I have no idea.

The other hose is a small 4" hose that comes out of the center/bottom of the petcock, and I see nowhere for that to connect.


Hopefully I can get this figured out quickly and get my bike back together. Ive been waiting 2-3 weeks to finish this carb job and ride again!
from your description the small hose goes to vacuum port on the carbs to open the petcock (even if in the on position no fuel flows without the vacuum)

the other big hose is a bowl vent that goes into the back of right filter housing to keep it out of the wind make sure it doesn't go to deep and bottom out,most on here cut it at an angle to insure it doesn't




If you see it on my bike I did it
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post #3 of 29 (permalink) Old 04-03-2011, 02:00 PM
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ok the first hose comes off a T between the two carbs and goes all the way up to the right side Ear or filter... the other hose goes from the vent nipple on the left carb to the petcock... hope this helps.
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post #4 of 29 (permalink) Old 04-03-2011, 02:01 PM
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denny beat me too it.... also if you go with the Yamaha petcock there is no vent line so you have to cap that one off.
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post #5 of 29 (permalink) Old 04-03-2011, 03:03 PM
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Quote:
Originally Posted by denny6006 View Post
from your description the small hose goes to vacuum port on the carbs to open the petcock (even if in the on position no fuel flows without the vacuum)

the other big hose is a bowl vent that goes into the back of right filter housing to keep it out of the wind make sure it doesn't go to deep and bottom out,most on here cut it at an angle to insure it doesn't
Diagram:
https://www.vn750.com/photopost/showp...o=1757&cat=503

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

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TOP TEN THINGS A NEW RIDER/OWNER SHOULD DO. Click on link.
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post #6 of 29 (permalink) Old 04-03-2011, 03:35 PM Thread Starter
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Awesome.... so when u say 'Dont bottom out the carb vent hose, what do u mean? Just dont bury it all the way into the hole?
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post #7 of 29 (permalink) Old 04-03-2011, 04:43 PM
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Originally Posted by PhayzR View Post
Awesome.... so when u say 'Dont bottom out the carb vent hose, what do u mean? Just dont bury it all the way into the hole?
Exactly. Even better, cut the very end of the hose off at a 45* angle and it can never get blocked off by pushing it in too far.

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
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post #8 of 29 (permalink) Old 04-03-2011, 05:34 PM Thread Starter
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As expected, nothing turned out as planned or hoped.

Still wont start. All the hoses are connected as they were before disassembly, and now it wont as much as TRY and fire. It cranks and tries to turn over, so now im off to get some starter fluid and see if that will help....

Any other suggestions?
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post #9 of 29 (permalink) Old 04-03-2011, 06:43 PM
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did you take the carbs completely apart and check the jets? If so, and I know this is probably an obvious answer, but do you have the fuel on?

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post #10 of 29 (permalink) Old 04-03-2011, 07:32 PM Thread Starter
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Lol, yes. I tried it in both ON and RES, and neither made any difference...
Starter fluid did nothing at all, not even a single fire, though I'm going to try again maybe tomorrow after I jump the battery to be sure.
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