taco eater :
Wayne Merchant from Oakand, CA United States
NOTE:If you have reed valves. If your running the thick stiff reeds you will be fine with running the four stroke AN bushing just by running a richer or leaner AN atomizer. Because reed valves reduce the intakes back flow/charge out the carb and back in. And the soft reeds will reduce less of the intakes back flow/charge. Its the piston port set ups that will benefit the most by running the two stroke AU atomizer and bushing. Because the C shaped AU atomizer dam helps prevent the piston ports intake systems, back flow/charge out the carbs bore at low RPM’s from sucking more gas out of the atomizer when exiting out and back in the carb. So the two stroke AU bushing & atomizer will pick up less gas from the AU atomizer system at low RPM’s, on piston port engine's. But every set up and combination will be deferent to tune in.