Just got these put on my 401, no resistors needed. There is a small gap because of how small the indicators are, but I’m going to try to put something there to cover them. Otherwise they look great! Very minimal, just how this bike was meant to be.
Yes, the headlight needs to come off together with the gauge. There are 4 screws. Once you have the headlight down, the plastic part containing the headlights has like 9 screws (there’s one in the middle). Take everything off and the rest should be straight forward