5. Dax Shepard
Dax has been a self-described gear head since he was 12 years old. He grew up in Detroit and his mother worked for general motors, then left that job to go work for a company in charge of all General motors press events. As a youngster, he scored an Elite 80 moped, then upgraded to a GSXR. He kept cruising the streets until he turned 16 and got his license. Then it was on. Now, he can rebuild engines and work on just about any modern or classic motorcycle. This is great for him and his kids because they can help him work on minor bikes like his 2006 Sport 1000, Multi-Strada Touring bike, Ducati and GSXR 1000 track bike. Impressive.