just got my blaster back the other day from having a big bore kit put on it, took it out for a light spin today and it bogs down and shuts off, kick starter is stuck...tomorrow i get to take it apart and see the damage
damn you

so before you ran it you did the leakdown test correct? what did the plug look like?
and before you tear it down, do the leakdown test...you need to figure out WHY it blew up, or it WILL happen again
Oil injection could have failed, rings in backwards, piston backwards, sound like a seized piston so possibly no engine oil?