In general, no matter what you do with foam, etc, you can't stop all wind noise. Dedicated foam and fur windscreens are designed to block wind on a static mic, not one moving at 60 mph. You hat to get the wind off of the mic completely to get rid of it. To do this, you need to move the mic out of the wind or use a solid object to block the wind in the helmet.
To move the mic, many people put it behind a cheek pad. But this will affect the sound of the mic. Your audio will generally shift toward the bassy end of the spectrum. To just block the wind from the mic where its at, just use a small piece of plastic or something between the mic and the windy side. hell, cut up a Solo cup and tape it on. A flat piece may not be completely successful as it can cause noise itself and disrupt airflow enough to possible still divert it into the mic. Curved or otherwise purposely shaped to move the air around the mic is best.
