99 yahama r6 wont start after it stalled

[99_yamaha_r6]

last evening my stupid fkn idiot friend turned on my bike and reved it hard while the engine was still cold and it stalled and wouldnt start back , the engine turns over but no combustion when the engine stalled i herd a brief cranking noise like like when your gear grinds on ur car while u shift anyone had this problem ?? or might know what it can be ???

 

[meme]

Revving a bike cold is not so great as the oil hasn't had time to both warm and reach all the parts it is supposed to lubricate to protect.

Saying that when the oil is cold it is less viscous - could have easily blown through a seal.

The grinding sound is concerning - that's metal on metal contact with no lube.....