Motorcycle racing has seen some incredible and tense races over the years, and there is no scenario with higher tension than a final-race title showdown.  A year of racing, and all the years of work that go into reaching the point where a racer can compete for a title, coming down to one final race is rarely not memorable, but there are a few that stand out.  5 – 2013 Moto3 World Championship Maverick Vinales came into the 2013 Moto3 World Championship season facing what was essentially a ‘must win’ campaign. That seems a lot of pressure for an 18-year-old, but having burst onto the scene in 2011 and winning…