The high velocity of the air flow means a stronger vacuum at the needle jet needle, providing more precise metering and better throttle response. Flat slide design helps create a smooth bore effect, increasing air flow. Significant performance improvements over older round slide carbs.
Great throttle response because of more precise fuel metering. Jetting may need to be changed per application. The intake bel OD is 62mm, The engine side spigot is 43mm, the white plastic cap on the carburetors cap is the idle adjuster. I recommend this carb for all 2 stroke 125cc cc or larger ATVs or Dirt bikes.