I was lucky enough to balance out my mic setup from the very first Motovlog I ever made. I am using a Sony ECMCS3 stereo mic with a GoPRO Adapter, Git2 action cam on my AGV Horizon helmet.
Thing is, my helmets cheek pads are "open" on the inside, which means I can pretty much just force my microphone into cheek pads foam without any modification or cuts. On top of my microphones foam, the wind/noise elimination is top notch and my voice comes out crystal clear.
Also, AGV Horizon helmet interior is designed with Bluetooth communication devices in mind! Helps alot with spare cables and stuff.