Carb Tuning - 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 3 (permalink) Old 07-09-2008, 07:12 PM Thread Starter
Join Date: Jun 2008
Posts: 25
iTrader: (0)
Carb Tuning

I was wondering if anyone new how many turns out from all the way in should I turn the adjustment screws on each carb?Thanks
lennyb3us is offline  
Sponsored Links
post #2 of 3 (permalink) Old 07-09-2008, 09:45 PM
Members who have donated towards server costs
750Doug's Avatar
Join Date: Apr 2008
Location: S.E. Michigan
Posts: 2,850
iTrader: (10)
For the pipes/backfiring problem? Is that what you're adjusting them for?

I've seen people state here anything from 2 1/4 up to 3 or so. I think I somewhere around 3 1/2 or a little more is where they fall out.
750Doug is offline  
post #3 of 3 (permalink) Old 07-10-2008, 01:44 AM
Members who have donated towards server costs
ChrisC's Avatar
Join Date: Apr 2008
Location: Wayne, NJ
Posts: 405
iTrader: (3)
IIRC the stock bike is set at about 1 5/8 turns from the factory. You would need to adjust if you have done mods like coastering and/or de-goating. I've seen a whole bunch of info posted on this, and there seems to be a wide variation in how folks have this set. Dan's online motorcycle repair info had this to say about the mixture screw: "When the engine is warm, turn the screw in till the engine stumbles, then out till it stumbles, and leave it at half way in between." I've also seen several references to "reading the spark plugs" to see how lean or rich you're running. Here's a link that I found useful (again from Dan's Motorcycle repair site) Like above, with the engine warm, run it at the throttle position you are interested in tuning for, in this case at idle, shut it down and "read" the plugs. I have both of mine set at between 1 3/4 and 2 (I am also coastered), and this seems to be working very well for my '89. I hope this helps.

Wayne, NJ
1989 VN750-A5
VROC #27781
-Replaced/Fused Stator & Replaced/Relocated R/R (15K mi.)
-MF Battery
-Splines Lubed
-Stebel Nautilus Horn
-AutoMeter 2" VOM
-Silverstar Headlight
-Refinished Gauge Rings and Mirrors(Flat Black)
-Refinished Swingarm/Lubed Pivots
-K&S Turn Signals Clear Cover/Amber Bulb
-Kenda Kruz 110/90-19 front 170/80-15 rear
-Clear Alternatives LED tail light
-Plexifairing III
-Willie & Max Saddlebags and SissyBar Bag
ChrisC is offline  
Sponsored Links


Quick Reply

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


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

Email Address:


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