I run the 5.3 gram per second injectors in my 50mm TB and never had the bike dyno tuned but I use a Thundermax auto tuner and the correct base map needs to be programed in for the bigger injectors pulse. I used the same base map for the 58mm TB and the 50mm TB all I did was use the same 5.3gps injectors, I went back to the 50mm TB because it had more of a low end response then the 58mm TB and for me was more cruising friendly. The 5.3gps injectors will work you only need to change the program in your ECM and if you don't have a auto tuner you will need a dyno tune.
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08 FLTR candy red sunglo,with 2015 103 HO, V&H Dresser Duals with Monster Rounds, Power Vision tuner, Willy Shiny Wheels and Forks and a bunch of other stuff.
Last edited by ironmark; 05-11-2013 at 12:13 PM.