Motorcycles are naturally self correcting in cross winds due to trail in the front end as was discussed in the "windy, slippery, slope" thread and is demonstrated by the video of the ecotracer. Which would make the same correction to the abrupt side wind blast with no hands.
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http://ecomodder.com/forum/285297-post137.html
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It helps to keep the cg on the roll axis high and the side center of pressure lower.