With the majority of LED indicators on the market, yes, you would still need to add some form of extra load to replicate the front filament lamp.
Having said that, I don't know if the new Vrod/Livewire LED's have a built in load or not.
You need resistor of around 6 ohm's for every lamp you remove. Or a plug in electronic unit is safer with less heat.
CAN bus/later model bikes may be different.
A quick test, just unplug one indicator and try it.
No built in load according to what I can see here, which makes sense as they are on a 2015 bike:
http://www.1130cc.com/forums/showthread.php?t=176945
Ya could give it a try Hilly, but I think ya would prolly end up with fast flashing dictators if ya didn't compensate the flasher circuit with
load equalizers.
Few other options ta gin around with would be to find a flasher unit that was made for that set-up. (lower resistance rating), or,
Fit yar own resisters inline with the front flashers. (as speedy says, around 6 ohm per light) jaycar or such.
