Guy's I received my Truckzilla .46 motor but what a bummer (You see the motor was hardly run). But anyway, I took the head off (To look at the piston) and found that the top of the piston head was all chewed up (Head button too) ARRRRR!!, so I removed the back plate and notice that the rear bearing had failed (It was missing a few steel balls). But all was not lost (I hope)..Unable to find a replacement, I had a couple of thou skimmed from the top of the piston (But head button was beyond any help), so I ordered a Gen GST 7.7 one (It should fit, as it's the same size motor)... Lucky the sleeve was not damaged.. What would cause the rear bearing to fail, in a short run time.....
Here's some pics of the piston top skimmed and the failed bearing too...
Last edited by hooleydog; 04-06-2017 at 04:17 PM.