Carb jetting - Yamaha ATV Forum
LinkBack Thread Tools Display Modes
post #1 of 3 Old 03-05-2019, 02:44 PM Thread Starter
Junior Member
Juanespinoza59's Avatar
Join Date: Mar 2019
Posts: 1
Carb jetting

Hi, my raptor has 146/148 main jets and 22.5 pilots and the needle clip is on the 3 groove. I want to run no air box lid but ever time I remove it, it bogs when full throttle. I tried moving the needle clip to the forth and fifth groove but just gets worse I need advice please.
Juanespinoza59 is offline  
Sponsored Links
post #2 of 3 Old 03-05-2019, 06:36 PM
Senior Member
Join Date: Feb 2015
Location: southern oregon
Posts: 1,873
removing the lid makes it lean you will need to go up on both the mains and the pilots. how much depends on your machine and any other mods. i would start with a 150/152 and the next size up on the pilots. and see how it runs
cory52000 is offline  
post #3 of 3 Old 05-02-2019, 01:41 AM
Junior Member
Join Date: Dec 2016
Posts: 8
Don't use the clip method. Just replace the jets. With the air cleaner delete you will need something a little bigger than 165.

Main Jet: Right 165, Left 160
Pilot Jets: 22.5 (both carbs) --> stock jetting is 22.5 ---supposedly when the pipe is changed and the K&N air filter you need to run #25 pilots.
mrbios is offline  

Quick Reply

Register Now

In order to be able to post messages on the Yamaha ATV 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:
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
single carb jetting Alex Bergman Yamaha YFZ350 Banshee (1987-Present) 7 08-28-2018 07:51 PM
Jetting Raptor 350 Carb with Mods Green_Optimus Yamaha YFM350 Raptor/Warrior ('87-Present) 1 06-30-2017 08:11 AM
Default 2004 Yamaha 450YFZ Carb Jetting inf0? shelbykiller Yamaha YFZ450/450R (2004-Present) 3 10-26-2016 08:45 PM
Need help with carb jetting with my mods Ryan81 Yamaha YFM350 Raptor/Warrior ('87-Present) 35 02-01-2016 10:38 AM

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