Dropped rear cylinder today - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Carbs and Fuel System
From the gas tank to the carbs
All fuel system discussion

 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 03-31-2011, 03:07 AM Thread Starter
Banned
 
Join Date: Dec 2010
Posts: 448
iTrader: (3)
 
Dropped rear cylinder today

I took my bike out today cause the weather was in the low 60's. She started ok, had a couple of small backfires in the rear carb, and after she warmed up I took off.
I was about 10 miles from my house, and all of a sudden she started running like crap, and lost a lot of power, and died at a stop sign.
I tried to fire her up and she would only run as long as I had my thumb on the starter switch.
After a few tries she fired up and would idle really rough and I had to keep on the throttle to keep her running. After I took off and brought the RPM's up she would run fine till I went back down to an idle.
I thought I had lost the rear coil cause yesterday I had put on a new set of plug wires, and I thought one of the wires had come off the coil.
I got her home, and pulled the rear plugs, and did a test to see if the plugs were firing, and they were, so no coil problems.
So I took the vacuum line off of the carb to the petcock to stop the flow of gas to the carbs and after it idled for a few seconds she straightened out and idled fine with great throttle response.
So my question is this, if the main jet is plugged up would it not have run at all on that cylinder?
I checked the mixture screws, and they are both at 2.5 turns.
I really don't want to pull the carbs, so I think I will try the seafoam in the fuel.
Any other ideas?
Sorry for the long post all.
RakerBill is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 03-31-2011, 10:45 AM
Old Truck Junkie
 
niterider's Avatar
 
Join Date: Jul 2007
Location: Roby Texas
Posts: 4,130
iTrader: (15)
 
Sounds like the back carb has a flooding issue. Abit of debree on the needle seat may be the problem. Drain the bowl and spray carb cleaner to remove trash from bowl.

02 honda sabre 1100
niterider is offline  
post #3 of 6 (permalink) Old 03-31-2011, 10:00 PM Thread Starter
Banned
 
Join Date: Dec 2010
Posts: 448
iTrader: (3)
 
I will give that a try niterider, thanks.
RakerBill is offline  
 
post #4 of 6 (permalink) Old 03-31-2011, 10:16 PM
Senior Member
 
clock152's Avatar
 
Join Date: Jul 2009
Location: Glenpool, Oklahoma
Posts: 900
iTrader: (1)
 
yeah sounds like a float stuck for a bit.. pull the drain plug.. carb spray it.. then run some Sea Foam thru it.. about 1/2 cup in a full tank and then again on a full tank and then a cap full every time you fill up.
clock152 is offline  
post #5 of 6 (permalink) Old 04-01-2011, 01:10 AM Thread Starter
Banned
 
Join Date: Dec 2010
Posts: 448
iTrader: (3)
 
I pulled my engine today so I could fix some water leaks.
I will post some pics of the carbs. Both intake boots were just sitting on the carbs, and the throats are full of dirt on both of them. Looks like a full clean is in order as well as jets.
I think I'm going to do the earshave and go with K&N's.
Now all I have to do is find the part numbers in the verses.
RakerBill is offline  
post #6 of 6 (permalink) Old 04-01-2011, 01:13 AM
Old Truck Junkie
 
niterider's Avatar
 
Join Date: Jul 2007
Location: Roby Texas
Posts: 4,130
iTrader: (15)
 
K&N RC-2340, I got mine from amazon.

02 honda sabre 1100
niterider 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