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to have full control of your efi system freedom to make major or minor adjustments ... dyno-developed by zipper s on real motorcycles choosing a map is a quick and easy ... after that you re ready to start the motorcycle once running let the bike warm up at ... dials in idle and warm-up settings for that particular engine and you re ready ... air/fuel ratio while compensating for variations in injectors fuel pressure ... most sophisticated systems you can buy for your harley® using the supplied ... software firmware and maps updates are free and accessible 24/7 with an internet ... requires exhaust system equipped for or modified for use with two oxygen ... ® ecm with autotune closed loop system for 2007 to 2009 xl sportster® models ... ® ecm with autotune closed loop system for 2002-2009 v-rod® models ...