I just put a wk54mm on mine,runs great. make sure tps is adjusted properly,if useing a larger injector, the pc3 maps are way different!!!
Daniel will get you in the right direction!!Start with buying a Power commander or New MSD Blaster for the bike
Make sure the wire harness with the Yellow wire center position is going to the TPS and not to the Map sensor
calibrate the tps..
What injector is in the 54mm tb?
once u get it running then get iut to a dynp with Air/Fuel readout and get it tuned
I put 12 v and a ground to the injector and it was clicking and opening like it should. ( and u could blow through it) And I put the oem injector in the 54mm tb and same result. Dyna ignition is unhooked thorough this process from day 1. Brand new gas and flushed tank new plug.unhook the dynatek and put it back to stock anytime something weird happens its usually the dynatek if its on there
if it was a old build and the inj was run with some nastier gas it could very well be plugged up you could swap inj and see if it gets better.