Not sure... I did my burnout, let go of the line lock, let it roll out a little, and just as i let off the gas, it just stopped. Dan thinks the crank was probably hurt and repaired before i got it, and it finally just let go. luckily it happened at a really low rpm, so nothing else really got hurt... I can't afford to keep fixing this thing, i think it's time to take a break.
My BMS crank did this in my Stage 1 motor at BPG in 05.
The only thing was i was at 6900 RPM!
Mine broke where it had been welded up from a skirt repair