But as racers get bigger they need a slightly bigger CRF150 and that's where the Expert comes in. But it still has all the same intense performance thanks to a powerful Unicam four-valve engine fully adjustable Showa suspension and championship-bred componentry throughout. It has bigger wheels a slightly higher seat and a slightly longer swingarm. Motorcycles Motocross 1580 PSN . 2009 Honda CRF150R Expert ONE ONLY! From a performance standpoint it's hard to outgrow the CRF150R...