Behind Sean Collier's YZ250F Photo Gallery

Behind Sean Colliers YZ250F
Before Collier's mechanics work their magic, the YZ250F's engine is a 249cc, liquid-cooled, five-titanium valved four-stroke.

Behind Sean Collier's YZ250F

Slideshow
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Collier uses a Sunline Hotstart Assembly with a Ride Engineering button.
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The skid plate, chain guide and engine case guard are by Light Speed.
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Sean Collier's YZ250F
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Star Racing/Lucas Oil Yamaha manager Brad Hoffman said the Vortex handlebars work good for Collier.
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This is Collier's second year aboard Yamaha's YZ250F.
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The exhaust system of Collier's YZ250F uses a FMF titanium 'Mega Bomb' pipe and a carbon fiber FMF silencer.
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Sean Collier's YZ250F
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Sean Collier's YZ250F
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Sean Collier's YZ250F
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Being on a support team, Collier gets a production bike from Yamaha and support from the manu but after that they're pretty much on their own.
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The wheels are by Alpina that utilizes a straight spoke which doesn't tend to come loose, are lighter, and rarely need tightening.
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The radiator cap can sometimes get popped loose by a rider's knee, so Collier's crew improvised by using a zip tie to hold it down tight.
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