On-board with Sean Collier, KX500 - Mammoth Motocross 2014 3 On-board with Sean Collier, KX500 - Mammoth Motocross 2014 Vital MX Play Again Check out Sean Collier ripping a huge holeshot and taking the win aboard a KX500 in the two-stroke class at Mammoth Mountain. Credit: Vurb Moto Related: Sean Collier KX500 Two-Stroke Onboard Video Share to Facebook Facebook Facebook Share to Twitter Twitter Twitter ML512 7/3/2014 9:57pm Share to Facebook Facebook Facebook Share to Twitter Twitter Twitter Related 3 comments Sort: Newest FirstOldest FirstPopular View replies to: On-board with Sean Collier, KX500 - Mammoth Motocross 2014 To post, please join, log in or connect to Vital using your Facebook profile Login with Facebook.
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