I'm not the upmost motor expert but over heating shouldn't prevent this motor to start. Not like there is a censor or something on it. I'd check all the basic stuff. Compression, spark, getting fuel. If it was low on oil and you think oil was frying. You may have to pull clutch cover off clean that screen by oil lines.
99 416ex
Big Gun, JE, Burgard, LSR, Maxxis, Tag, Hot Cam, PEP, Powermadd, DG, K&N and Maier
Thanks Burgard Racing, Colby (C&D Racing) and Pappy (BK Performance Coatings)
2009 Special Edition 450ER
Big Gun, K&N, Houser, Tag, Powermadd, Pro Armor and LSR
1995 TRX90
Big Gun, ITP, Tag, K&N and Blingstar