I posted below a topic on ft./lbs. to use when tightening the oil drain plug as I didn't want to overtighten and strip out the internal threads as this happened to my neighbor. He's without a computer so I ask for him on the procedure he needs to follow to repair his bike.

 

Use a HELICOIL. You drill the hole out tap it and screw this in, its like a sleeve.

 

If the coil doesn't work he might have to replace that part of the engine. It is very important when installing the coil to make sure it isn't crooked. If it isn't done correctly he could have a continuous DRIP.
I'm not sure what kind of quad he has but the Recon drain plug tightens at 18 lbf-ft.

 

Go to a auto parts store and buy the correct size heli coil then insert the bolt only into the engine and strip it out really good the screw the heli coil onto the bolt and screw the whole unit into the drain plug hole.