R/C Tech Forums - View Single Post - OS Carbs - 21J Ver 1,2,3
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Old 03-28-2018, 12:31 PM
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You can look right in the top of the slide and see a big difference.

The 22c has a built in 6.5mm (or so) restrictor. In case you mix them up..

The 21j carb is more user friendly.
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