What makes the SmartCarb so smart? ・・・ It’s green💚 The SC2 is the only single circuit, internally vented carburetor made today. Superior metering rod fuel atomization from idle to WOT means more complete and efficient combustion at all throttle positions when compared to conventional jet/needle carburetors or those with multiple circuits. SmartCarbs have been EPA certified, twice, proving capable of reducing emissions by up to 50%. Not only that, their sealed design drastically reduces evaporat