It will only take about 5-10 mins to install the BRP headset in the ST-1 helmet. The cuts in the side for the speakers are already there.
The ST-1 Hybrid Helmet with the built-in communication system only means that the speakers and mic are already installed, its not an actually communications system. You have to have the BRP CB/Communication System and Entertainment Harness for it to work. This is on top of the price for your helmets.
From the Can-am Spyder website:
Can-Am ST-1 Hybrid Helmet with built-in communication system
Multiple functionalities when fitted with optional one-of-a-kind jaws
Integrated communication capabilities
*Works in conjunction with CB & Communication system (219400145) available as an option on Can-Am Spyder RT ($800), Entertainment Harness (219400201)($115).
Ventilation features include two ventilation tab kits (one open and one closed) with anti-fog spray kit, triple configuration flexibility (jet, vented and full face), continuous top ventilation and exhaust
Double D ring closure
Anti-scratch visor, retractable sun visor
Moisture-wicking and breathable removable liner and cheek pads
Optional longer visor, vented and full face jaws sold separately
D.O.T. certified