This a movie about two guys, childood best friends (rider and mechanic), how buids a track race bike, with an harley engine and go race in a championship with it... they start to win and fame rises up on the driver who goes to ride for an honde team with a crapy prototype, and dtarts to downfall... next comes a comeback from the two budies and the bike and they win the çast race...

Finishing scene is the two os them doing a victory lap in the back of a pick-up with an american flag...

Thanks

Race for Glory (http://www.imdb.com/title/tt0098158/)?