Comes with 33mm venture suitable for 1300 race engines and 1600/1750 street.

Limited venturi size availability makes these 40DCOE difficult to tune. 1600 and 1750 race engines require larger venturi.  For race application you should upgrade to the 45DCOE for both better performance and parts availability.

Note: These carbs all come equipped with throttles shaft lever for #2 carb of a dual setup. The #1 carb needs the throttle shaft lever to be changed. See part # 45048005.

For jetting chart, go to "More Product Information."