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2,264 Posts
If you have one in your helmet....it's best to use it! 
http://www.youtube.com/watch?v=4r2eVzQQWr4&feature=em-uploademail&ab_channel=MoreBikes.co.uk
http://www.youtube.com/watch?v=4r2eVzQQWr4&feature=em-uploademail&ab_channel=MoreBikes.co.uk