Show n' tell brief overview on jetting. - Kawasaki Ninja 250R Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 14 (permalink) Old 09-08-2014, 07:16 PM Thread Starter
Senior Member
 
Join Date: Apr 2014
Location: Calgary,Alberta,Canada
Posts: 126
Post Show n' tell brief overview on jetting.

OK, it's no secret there are lots of Questions about jetting! So I thought I'd do an info post on the basics with a few pics and some explaining to go along with it. I have an extra set of carbs off a 2009 Ninja 250r. They are the same from 2008-2012. It's gonna be a few posts as I seem to be only able to post I pic per post. So first pic here is one of the bottom of the carbs with the float bowls in place.
Attached Images
File Type: jpg image.jpg (121.1 KB, 11 views)
TurtleSE is offline  
Sponsored Links
Advertisement
 
post #2 of 14 (permalink) Old 09-08-2014, 07:26 PM Thread Starter
Senior Member
 
Join Date: Apr 2014
Location: Calgary,Alberta,Canada
Posts: 126
Second pic is with my finger pointing to the idle mixture screw. When the carbs haven't been worked on these screws will be covered with a metal plug that has to be drilled with a small drill bit and then quite often a screw will be used to pull out the plug. Don't worry about replacing the plug. This screw is usually gently turned down to the bottom and grounded while counting how many turns that takes just for reference sake. Then quite often for a stock bike it would be turned back out from ground 2.5 turns.
Attached Images
File Type: jpg image.jpg (95.5 KB, 9 views)
TurtleSE is offline  
post #3 of 14 (permalink) Old 09-08-2014, 07:29 PM Thread Starter
Senior Member
 
Join Date: Apr 2014
Location: Calgary,Alberta,Canada
Posts: 126
This pic is general one of the bottom of the carb with the float bowl off.
Attached Images
File Type: jpg image.jpg (115.1 KB, 11 views)
TurtleSE is offline  
Sponsored Links
Advertisement
 
post #4 of 14 (permalink) Old 09-08-2014, 07:32 PM Thread Starter
Senior Member
 
Join Date: Apr 2014
Location: Calgary,Alberta,Canada
Posts: 126
This pic is pointing out the main jet. This is the one that gets changed when you re-jet.
Attached Images
File Type: jpg image.jpg (111.4 KB, 15 views)
TurtleSE is offline  
post #5 of 14 (permalink) Old 09-08-2014, 07:37 PM Thread Starter
Senior Member
 
Join Date: Apr 2014
Location: Calgary,Alberta,Canada
Posts: 126
This is what it looks like removed. Not very big. The size of jet used depends on mods and altitude etc.
Attached Images
File Type: jpg image.jpg (54.6 KB, 13 views)
TurtleSE is offline  
post #6 of 14 (permalink) Old 09-08-2014, 07:41 PM Thread Starter
Senior Member
 
Join Date: Apr 2014
Location: Calgary,Alberta,Canada
Posts: 126
This pic is of the top of the carbs. Underneath here are the vacuum sliders and fuel needles.
Attached Images
File Type: jpg image.jpg (106.8 KB, 9 views)
TurtleSE is offline  
post #7 of 14 (permalink) Old 09-08-2014, 07:43 PM Thread Starter
Senior Member
 
Join Date: Apr 2014
Location: Calgary,Alberta,Canada
Posts: 126
When you take off the black cover there is a spring under the cap.
Attached Images
File Type: jpg image.jpg (118.3 KB, 11 views)
TurtleSE is offline  
post #8 of 14 (permalink) Old 09-08-2014, 07:44 PM Thread Starter
Senior Member
 
Join Date: Apr 2014
Location: Calgary,Alberta,Canada
Posts: 126
Spring removed it has a plastic part on the bottom.
Attached Images
File Type: jpg image.jpg (106.6 KB, 12 views)
TurtleSE is offline  
post #9 of 14 (permalink) Old 09-08-2014, 07:49 PM Thread Starter
Senior Member
 
Join Date: Apr 2014
Location: Calgary,Alberta,Canada
Posts: 126
The black section is the sensitive rubber membrane part of the vacuum slider. Gently peel it back around the round edges, you don't want to tear it! Then you can remove the vacuum slider and the fuel needle. The shiny part in the center that I'm pointing to is the top of the fuel needle.
Attached Images
File Type: jpg image.jpg (82.1 KB, 9 views)
TurtleSE is offline  
post #10 of 14 (permalink) Old 09-08-2014, 07:54 PM Thread Starter
Senior Member
 
Join Date: Apr 2014
Location: Calgary,Alberta,Canada
Posts: 126
This is the vacuum slider removed. That's the rest of the fuel needle sticking out the bottom. Note when cleaning carbs the vacuum sliders should be removed and kept far away from any carb cleaner! The rubbers can be easily damaged.
Attached Images
File Type: jpg image.jpg (113.4 KB, 7 views)
TurtleSE is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Tags
jetting, overview, show

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki Ninja 250R Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

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