LT. My grandson broke his KX frame the first few rides. They break at the front downtube and the cradle under the engine. Had to take and glove it with some 4130 chrome moly tubing to make it live. They also have a problem with crank big end bearings. Did more cranks on that bike than I can remember.
It may be a good bike for Conner until he starts jumping the big doubles, then, you may want to takes Strick's suggestion and get him a KTM. That is what we did and the KTM is holding up very well.