I think the X9/X10 do 3 Full Journey's a Day, which in Mileage is 186 Miles in 3 Round Trips, 150 Miles of that a Day must be Motorway Work from Heworth to Middlesbrough and back, with a Few Minutes Stop at Peterlee and Stockton also, is it no wonder the B9TL's are Breaking Down so often, same with the B7TL's when they were on the X9/X10, no wonder with such a Demand Route like that.
B9TL Engine
D9B-260; D9B-310
Output: 260hp = 1100Nm - 310hp = 1400Nm
B9R Engine
Rear-mounted, 6-cylinder, 9-litre diesel
D9B 380HP 286kW (at 1900 r/m) 1740Nm
Maybe Go North East should fit the TTX with B9R Engines rather than the B9TL Engine, could be Quick Fix Solution to Reliability of the Service, rather than shelling out shed loads of Money on Coaches or Something.
RE: 2014 GNE Bus Order Predictions