jj111,
Not to be an ass, but I hope that you own a helmet and currently own a bike.
Anyway, this is a helpful list of helmet information compiled by amsctalx.
QUOTE
I think that it is important to make the distinction between "disturbed" and "undisturbed" airflow when discussing helmet buffeting. Some helmets may be aerodynamically stable in an "undisturbed" airflow, but react poorly to turbulence.
Here are my personal observations on several available helmets that my friends and I own. All of these fit me tightly, some not comfortable (to me) and just worn for a quick high-speed blast:
Shoei RF800: Mild flutter and lift in clean air. Annoying two-axis wobble in turbulent air. Some sensitivity to head-turning. Rating: so-so
Shoie RF900: Little flutter and lift in clean air. Some low-frequency "tracking" of turbulent air. Some sensitivity to head-turning. Rating: OK
Shoei X-SPII: No flutter or lift in clean air. Almost no reaction to turbulence, or head-turning. Rating: Very good.
Shoei X-II: No flutter or lift in clean air. Almost no reaction to turbulence. Excellent head-turning characteristics. Rating: Excellent.
Schuberth Concept: Little flutter and lift in clean air. Some mild reaction to turbulence. Good head-turning characteristics. Rating: Good.
X-lite (Nolan) X-901: No flutter, but a small amount of lift in clean air. Some mild reaction to turbulence. Good head-turning characteristics. Rating: Good.
HJC CL-12: Little flutter, some lift in clean air. Some medium frequency response of turbulent air. Some sensitivity to head-turning. Rating: OK
Disclaimer: These are my impressions. Your mileage my vary, blah-blah-blah...
Mike
End Quote.
Hope that this helps, and welcom to the board.
Stealth, the one and only.