I was recently talking to a friend who is head technician at one of the main Triumph dealerships . I was expressing concerns about gearboxes on the rocket in general and he mentioned that they have recently had a spate of 2011 to 2013 bikes in , mainly roadsters that had chewed 3rd and 4th gears . Some ridden hard and some not so . There seems to be no rhyme or reason to this problem , you either get a good one or you don't . There is some light to this tho
@Dr G as he also said there has been issues with the output bearing also on these models so maybe your problem is not so terminal , fingers crossed ?
Also , altho not related and in response to a previous thread , he mentioned that as of early 2016 triumph have indeed upped the scheduled 10000 mile valve check to 20000 in light of none of 10000 mile bikes being out of tolerance !
As
@Dr G says tho , the triumph promotional video does show wheelies and burnouts , but it doesn't show the bikes used being returned for gearbox rebuilds ! If the bike is not capable of handling that kind of abuse , it seems wrong that Triumph themselves should advocate it !
Good luck with the problem mate , I really hope it doesn't turn out to be too painful ?