With a fresh engine, try re-adjusting the idle mixture screw turning in until very lightly seated, then opening about 1 and 1/2 turns. Once the engine has a thousand miles, you should be able to re-adjust to just 1 turn.
Jon.
Good carburetion is fuelish hot air The most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes! The Carburetor Shop
