yes the cases are split... I had to split them anyway cause the con rod on flywheel side isn't even attached to the crank anymore.. and found it was the crank seal let go on fly wheel which leaned it out and caused piston to pop a nice size hole on exhaust side... which then chunk must have got jammed in the crank/con rod and locked it up. as well the con rod is bent I will snap some pics and post the distruction it caused in a hour or so.... yes I have done lots of research onto what I wanna do which I am honestly leaning towards my stroker crank a long rod on a 65.5 mill piston... I can hone the cylinders and leave it at 65mil pistons but I would feel better boring as there is some minor scuffs in cylinder that blew as well as piston burnt onto cylinder which should clean off.... and I was riding before a full factory ride can am ds 450 completely built dasa porting 14.5:1 cp piston, custom fmf exhaust tubing was larger then consumer stuff, bored tb, larger injector, ecu heavy modded, straight 110 octane race fuel 8 percent oxy fuel.... I never really got bored of it how ever I just rd it retarded to the point most people I rd with called me nuts and don't under stand the faster u go across the whoops the smoother it is... as long as u are comfortable and able to control it in a whoop section that u only have maybe a foot on each side of quad before ur into the trees.... so ya didn't really get bored of it just got use to it and always wanting more