I admitted defeat and brought her to a shop...Now what? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Carbs and Fuel System
From the gas tank to the carbs
All fuel system discussion

 7Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 68 (permalink) Old 06-03-2017, 06:53 PM Thread Starter
Member
 
Join Date: Nov 2016
Location: New York
Posts: 92
iTrader: (0)
 
I admitted defeat and brought her to a shop...Now what?

After a month of fiddling with her, I finally broke down and brought my baby to a shop. The problem that has been plaguing me was that she got super sluggish and bogged down (almost like one cylinder firing inconsistently), then eventually die altogether on lower RPM's. After a while, she would eventually run great all the way through the powerband, only to then sputter out and die 10 minutes later. Waiting a few days would then make her fun again for only 10 minutes, rinse and repeat.

So I brought her to a shop near me. They took apart and cleaned the carbs, fixed some messy work of mine from the rebuild, and said she's good to go! Well if you see me posting on this forum you know things aren't running right.

Now what's happening is above ~30 mph the bike does the exact same thing as before, although now the problem is happening all the time. Very sluggish and bogging down. I immediately brought it back to the shop after picking it up. The theory that the mechanic at the shop gave me was that one of my pod filters was in direct view of the forwards wind, therefor forcing air into that carb. I was unsure, only because I've had 900 miles since the rebuild with pod filters without ANY issues. So I come to you handsome folks once again to beg for help

Any ideas?


(I'd like to note that over those 900 miles the bike would become sluggish just like this problem, although it only happened 2-3 times ever. After riding for a while she would begin to bog down. After waiting a minute or two on the side of the road she would start right back up without issues. Almost like the phantom out of gas issue. Now it's become a regular occurrence. I have a new tank that's properly vented btw.)

'86 VN750

Last edited by snoopyonderdonk; 06-03-2017 at 06:56 PM.
snoopyonderdonk is offline  
Sponsored Links
Advertisement
 
post #2 of 68 (permalink) Old 06-03-2017, 06:56 PM
Super Moderator
 
Join Date: Feb 2013
Location: SW Florida
Posts: 2,442
iTrader: (5)
 
carb vent hose.. either not in clean, non-turbulent air, or its kinked.

since you shaved, common location is under tank, either secured to top of frame rail, or connected to the nipple on the cover for the fuel sender unit

2005 VN750

Sold 11-27-17
michiganteddybear is online now  
post #3 of 68 (permalink) Old 06-03-2017, 07:04 PM Thread Starter
Member
 
Join Date: Nov 2016
Location: New York
Posts: 92
iTrader: (0)
 
Quote:
Originally Posted by michiganteddybear View Post
carb vent hose.. either not in clean, non-turbulent air, or its kinked.

since you shaved, common location is under tank, either secured to top of frame rail, or connected to the nipple on the cover for the fuel sender unit
One of the things they fixed was the carb vent hose. They relocated it to under the tank, cut at a 45 degree angle. Before I had it sticking out on the right side of the bike directly in the wind

'86 VN750
snoopyonderdonk is offline  
 
post #4 of 68 (permalink) Old 06-04-2017, 08:29 AM
Super Moderator
 
Join Date: Feb 2013
Location: SW Florida
Posts: 2,442
iTrader: (5)
 
relocated to under tank is not enough, it needs to be above the frame rails, or on top side at minimum (where mine is), and for what its worth (shouldnt be an issue for you tho), mine is cut square. next thing would be to check that the vent lines from both carbs are going into a T fitting, then up under tank. or make sure they didnt hook the wrong hoses to the vents (I have heard of shops that put the fuel feed from petcock onto the vent ports)

2005 VN750

Sold 11-27-17
michiganteddybear is online now  
post #5 of 68 (permalink) Old 06-04-2017, 09:09 AM
Senior Member
 
Join Date: Feb 2017
Posts: 108
iTrader: (0)
 
Garage
Quote:
Originally Posted by michiganteddybear View Post
relocated to under tank is not enough, it needs to be above the frame rails, or on top side at minimum (where mine is), and for what its worth (shouldnt be an issue for you tho), mine is cut square. next thing would be to check that the vent lines from both carbs are going into a T fitting, then up under tank. or make sure they didnt hook the wrong hoses to the vents (I have heard of shops that put the fuel feed from petcock onto the vent ports)
fully agree. Michigan helped me with the same issue you have. After the shop fixed the carb - the lines were hooked up incorrect. his knowledge helped greatly.
Brooklyn_Vulcan is offline  
post #6 of 68 (permalink) Old 06-04-2017, 09:56 AM Thread Starter
Member
 
Join Date: Nov 2016
Location: New York
Posts: 92
iTrader: (0)
 
Quote:
Originally Posted by michiganteddybear View Post
relocated to under tank is not enough, it needs to be above the frame rails, or on top side at minimum (where mine is), and for what its worth (shouldnt be an issue for you tho), mine is cut square. next thing would be to check that the vent lines from both carbs are going into a T fitting, then up under tank. or make sure they didnt hook the wrong hoses to the vents (I have heard of shops that put the fuel feed from petcock onto the vent ports)
You think the height of the carb vent tube would fix that? I'll check it out though As well as whether they hooked everything up correctly too

'86 VN750
snoopyonderdonk is offline  
post #7 of 68 (permalink) Old 06-04-2017, 10:11 AM
FREEBIRDS MC CENTRAL NY
 
OleDirtyDoc's Avatar
 
Join Date: May 2011
Location: Norwich,NY
Posts: 15,873
iTrader: (0)
     
Garage
Send a message via Yahoo to OleDirtyDoc
Quote:
Originally Posted by snoopyonderdonk View Post
You think the height of the carb vent tube would fix that? I'll check it out though As well as whether they hooked everything up correctly too
I agree with teddybear. try putting the hose on the nipple (I LOVE saying that word )on the sender.that's a common problem people have with the earshave

Sent from my LGL34C using Tapatalk

ONE RATS ASS GIVEN PER POST
Support your local FREEBIRDS MC
1986/5 Vn700/750 Frankenfook cross eyed bitch "Mellisa Fayhe"
I am a BIKER and i'm proud.FREEBIRDS MC CENTRAL NY

lowered with progessive 412 10" shocks
rejetted for K/N Pods part#rc 2340
sportster seat

'I didn't lose my mind.i gave it away

BRING BACK WOLFIE."Peace and Carrots"RIP
"And I'm free...as a bird"John Lennon Free as a Bird
"I only carry when I have my pants on"Joe Robinson RIP aka Old Dog
OleDirtyDoc is offline  
post #8 of 68 (permalink) Old 06-04-2017, 10:50 AM Thread Starter
Member
 
Join Date: Nov 2016
Location: New York
Posts: 92
iTrader: (0)
 
Quote:
Originally Posted by OleDirtyDoc View Post
I agree with teddybear. try putting the hose on the nipple (I LOVE saying that word )on the sender.that's a common problem people have with the earshave

Sent from my LGL34C using Tapatalk
Wait, sorry. The carb vent hose on what now? The petcock vacuum?

'86 VN750
snoopyonderdonk is offline  
post #9 of 68 (permalink) Old 06-04-2017, 11:13 AM
FREEBIRDS MC CENTRAL NY
 
OleDirtyDoc's Avatar
 
Join Date: May 2011
Location: Norwich,NY
Posts: 15,873
iTrader: (0)
     
Garage
Send a message via Yahoo to OleDirtyDoc
there's a nipple on the bottom of the fuel gauge sender that most hook the carb vent line to

Sent from my LGL34C using Tapatalk

ONE RATS ASS GIVEN PER POST
Support your local FREEBIRDS MC
1986/5 Vn700/750 Frankenfook cross eyed bitch "Mellisa Fayhe"
I am a BIKER and i'm proud.FREEBIRDS MC CENTRAL NY

lowered with progessive 412 10" shocks
rejetted for K/N Pods part#rc 2340
sportster seat

'I didn't lose my mind.i gave it away

BRING BACK WOLFIE."Peace and Carrots"RIP
"And I'm free...as a bird"John Lennon Free as a Bird
"I only carry when I have my pants on"Joe Robinson RIP aka Old Dog
OleDirtyDoc is offline  
post #10 of 68 (permalink) Old 06-04-2017, 01:36 PM
1986 VN750
 
thtanner's Avatar
 
Join Date: Nov 2011
Location: Dana Point, CA
Posts: 3,255
iTrader: (8)
 
Garage
Quote:
Originally Posted by snoopyonderdonk View Post
Wait, sorry. The carb vent hose on what now? The petcock vacuum?
No..

They said the fuel gauge sender, not the petcock.

It's in the middle, directly under the tank (ON the tank itself.) It's a square plastic piece with a nipple on it. Use that nipple for the carb vent hose.

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350

Last edited by thtanner; 06-04-2017 at 01:38 PM.
thtanner is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Once registered, your User Name"cannot be changed". We can make exceptions within 7 days, but after that, it is set in stone.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome