World Superbike team's dirt crew: Martin Barr and Jake Shipton

While their official factory Yamaha World Superbike crew os Alex Lowes and Michael Van der Mark is winning races on the tarmac, the Crescent Yamaha's dirt bike heroes are making waves on the soft stuff. Veteran Irish rider Martin Barr is in the hunt for several British MX2 titles, and Jake Shipton is having a breathrough season with podium finishes in the MX1 championship. We catch up with them at the ledendary Hawkstone Park Maxxis British championship round.