Carb jetting - Yamaha ATV Forum
 
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post #1 of 3 Old 03-05-2019, 02:44 PM Thread Starter
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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.
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post #2 of 3 Old 03-05-2019, 06:36 PM
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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
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post #3 of 3 Old 05-02-2019, 01:41 AM
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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.
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