Maybe, although 1.25amp BEC isn't much either.
A 10-wheeler dump trk has alot of weight on the steering axle & it takes a servo similar to the Hitec 645 to steer it well, especially in soft ground.
I've tried Castle Creations CC BEC with a 5amp limit in the green GL dump trk that's using a Sabertooth dual esc (trk for/rev & power hyd dump), I've never had the trk time out on me with over current draw.
http://www.castlecreations.com/products/ccbec.html