DRAIN BOLT STUCK AND ROUNDED NEED HELP

my friend has a 07 yz250 ( i know it's not husky but i need urgent help) and his drain bolt is rounded and stuck, we have tried vice grips, filing the sides flat but it wont move someone help!!!

Filing the sides flat should work.. Maybe add a bit of heat around the case. Give the bolt a few taps while putting pressure on the bolt with a wrench.

i use a pipe wrench the type that tightens up as you put pressure on it but make sure youve got another to replace it, heat gental tap with hammer, hang on it.

very last resort drill it bit by bit making hole larger keep as central as poss, pick all the plug thread out and with any luck you can put a new bolt in, or if you fancy a proper ball ache, split the cases helicoil and make sure of clearance wither way it would be easyer to tip bike upside down to drain an re fill with correct amount of oil... sell it quick

First thing I always do with a stuck bolt is squirt some Kroil on it and let it sit for an hour. For an overhead application like a drain bolt, Aero Kroil spray would work well.

If its too far gone weld a nut over the bolt and screw the bolt using the nut. The heat from the welding will loosen it up nicely. It worked a treat for me on my LANDCRUISER transfer case when it rounded off.