RPM's wont come down to idle - 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 5 (permalink) Old 05-19-2010, 08:22 AM Thread Starter
Junior Member
 
Join Date: May 2010
Posts: 5
iTrader: (0)
 
RPM's wont come down to idle

Bought this '03 three weeks ago with less than 700 miles on it. Adjusted idle speed but smells rich, give it some throttle and the RPM hovers @ 1800. Checked vacuum lines, any ideas? Throttle cables/linkage snap back & work fine. Play with the idle adjust wheel some more, give it throttle, same thing

Last edited by newby27; 05-19-2010 at 02:02 PM.
newby27 is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 05-19-2010, 09:14 AM
Members who have donated towards server costs
 
KIMMERLING's Avatar
 
Join Date: Sep 2009
Location: SAN ANTONIO, Texas
Posts: 1,126
iTrader: (7)
 
Send a message via Skype™ to KIMMERLING
All i know is that the slightest air change in volume due to intake or leak can through that idle off. I didn't replace the oring on the air cleaner (thinking it was such a stupid part) and the bike idled high due to the increased intake. I ordered another oring(20 bucks) oem from ron ayers. Now i am earshaving....so much for the ears and the 20 dollar orings.

2011 Suzuki VSTROM DL650 with ABS Purchased Jan 28 now with 39,000miles WRECKED JAN 12 ,2013
"To strive, to seek, to find, not to yield."
05 Vulcan 750 26,050miles *Traded in*
Ventura guards
MadStadt mount
Givi windshield/Heated grips
Backoff
Riderbeads
Givi 52 topcase
Pat Walsh Crash bars skid plate
OEM centerstand
Headlight modulator
Battery tender
Aquarium thermometer with forward probe mount
Admore LED Lighting/Givi E36N panniers
KIMMERLING is offline  
post #3 of 5 (permalink) Old 05-19-2010, 01:54 PM
Junior Member
 
w.waters1's Avatar
 
Join Date: Oct 2009
Location: Omaha, NE
Posts: 21
iTrader: (1)
 
lube the lines

Is the throttle sticking or is it coming all the way back to the original position. Might have to adjust the adjust screw down to bring down the rpm's. Just start it and let it get warm. adjust the screw. It's located on the left side of the bike. It's actually a black knob. turn one way if the rpm's go up turn it the other way to where you feel comfortable. Also check out this link on lubing your lines. http://community.cruisercustomizing....177/22960.html

The adjustment screw is on page 26 of the service manual.

Ride safe.
w.waters1 is offline  
 
post #4 of 5 (permalink) Old 05-19-2010, 02:23 PM
Calif Rider
 
weh44att's Avatar
 
Join Date: Jan 2006
Location: Petaluma Calif
Posts: 725
iTrader: (0)
 
Check you air filters,clean, dirty, and if there are any. Try Sea foam, this can help to clean out the carbs. You could have a stuck float. Let us know what you found.

2004 25,500 miles
Led tail light enhancement
Homemade floor boards
Headlight modulator
Extra heat sink on R+R
R+R relocation
Homemade driver's backrest
Fused Stator
Mcct conversion-cost 4.50
Ride-on in tires
crash bar with home made hyway pegs
iridium plugs
home made fork wind deflectors
coil pickups adjusted.
Kenda kruz tires 110/90 170/80
weh44att is offline  
post #5 of 5 (permalink) Old 05-19-2010, 02:26 PM
Members who have donated towards server costs
 
fergy's Avatar
 
Join Date: Mar 2006
Location: Kyle, Texas
Posts: 4,054
iTrader: (3)
   
An 03 with 700 miles on it has sat most of its life, which you probably know is bad for a bike. Things get gummed up over any period of time the bike sits. It could be vacuum related, but since you smell fuel, I'm thinking that your choke might be sticking, or the diaphragms could be sticking, or even the floats sticking open some allowing too much fuel being overflowed into the intakes. These are guesses, but it might be worth at least going on a half can of seafoam in your gas for a tank or so and even filling the carbs through the fuel hoses and letting them sit overnight to see if it clears up any varnish.

Ordinarily, when the throttle snaps back solid and the rpms hang up, I would suggest vacuum leaks, but the fuel smell sounds suspicious to me.

Fergy
Kyle, TX VN750.com member #707 VROC#19556
2002 VN1500 Classic
Spline Lube Procedure, with photos, R/R Relocation and Coil Mod
Rusty Tank Cleaning!
Electrical Fault Finding Flowchart
SEAFOAM JUNKIE!


fergy 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