More information needed
is it a vehicle, stationary motor, outboard, aircraft engine ?
the usual one on cars is overfilling the oil.
how do you stop oil leaking from a 2000 sportster primary cover
It depends on why it is leaking.
Either the cap is cracked, which you will need a new one from the dealer. Or you forgot the o ring when installing the new filter
BP put a new cap on the leaking pipe, but, as of July 14, 2010; no one knows if it's working to stop most of the oil from escaping the leak.
No.
Most stop leak additives do nothing but empty your wallet. Replace the gasket that is leaking.
Try replacing oil filler cap.
Buy a new one.
yes its called JBWeld
Oil pump driveshaft (also referred to as distributor) o-ring is bad. Replace, and oil will stop leaking there.
a week after the accedent
Bye a New 1.