The whole 390 lbs thing had me wishing I wasn’t in masters. 50lbs of lead is painful without an electric kart lift. But that’s on me for overdoing getting to race weight. Damn kids on rental karts.
This would benefit some sort of pre-drive check. I have blown an engine due to running it without coolant. I have also had the hose dis-attach and the cap to the rad come undone mid race, too.
Check fluids.