83 Tenere, Oil Pump
 

Hi, Ive got a problem, the oil is only just returning into the oil tank and the bike is almost siezing at speeds over 60, I think some gasket sealant might have got into the motor and blocked something or the oil pump might have packed it in,
Is it safe to empty the oil and blow air threw the system to unblock, How do i now if the pump is the problem, the oil tank is staying cold

Cheers From Tunis