That's one reason why the total mileage interests me - a 2017 V Rod can't have very much on it. The counter balancer bolt tq is 37 ft/lb AND 90 degrees ( hopefully they remembered the 90 degrees at the engine factory ) If the timing of the C/B gear was incorrect from the factory it may have vibrated more than normal but if it's a new to you bike it might not be noticed as out of the norm - possibly this could have eventually broke the gear retaining bolt ( or it just backed out from improper tq ) and that really let it get out of time where it started hitting the rod bolts with the balancer counterweight. If you figure an average engine speed of 4000 rpm ( and I believe the balancer runs at that same rpm based on the gear diameter but in the opposite direction ) it wouldn't take long in time to machine a couple tracks and eventually devolve down into a sudden stop - if the gear fell off the splines completely the balancer could also have been rotated by the rod bolts hitting it as well, totally kicked around & uncontrolled. Hard to say exactly what happened first, hopefully Motor Mike will chime in and maybe have a couple more photos for us. Or maybe he's gone to the dark side and H-D has had him sign a NDA - his silence in exchange for a new engine and now he'll never report back

- and we'll be waiting for sudden stoppage at 130 Mph.

BTW what's your opinion - will a slipper clutch totally disengage during a high speed ride with a sudden engine seizure and remain disengaged until the bike finally stops at 0 Mph ? ( No rear wheel skidding - ) Thanks -