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It has to be a drainage hole...so running and insert or heli-coil covering the hole...im guessing part of the engine case won't fully drain when he does the next oil change....think it only holds like 1l of oil...

Got another pic...before pulling out the detached threads...threads are covering half of the hole...

Zooming the pic...you can kinda make out the hole inside the hole...left bottom.

Oh! And I highly recommend the kid to get himself a torque wrench, cause like bus"ster" he's got no clue what his doing...lol Found a new nickname for Buckster... "" Busster"""

Clearly I have more experience working on tractors than you have...lol.

Honestly if the bike would have been a few years old..I might have risk it...the frigen thing is only a few month old...and just found out that the Yamaha dealer only has heli-coils to repair the thing...not the best to repair a oil plug...

The day I ask a potcher like you for help will be a cold day in hell.

If I need help with that, I’ll ask you which mechanic I should go to.

Go check your oil on your Triumph...lol.

Here you go again with that black guy...the fellow who asked me on a private channels how to put the new cam chest together....now Im regretting helping you out...

Long story short: Your sons friend asked you for help fixing a thread on an oil plug, being a master mechanic you sent him to a dealership.

Just because you installed brake pads on the hairdresser mobile ...doesn't make you and expert...

Is that because it's true?

https://www.facebook.com/share/19ER5GAmbD/ Think I've just found a real Italian resto....and it's about 1.5 hours away...must have passed that town hundred of times...never noticed the place...ill be stopping for sure next drive thru.... All we have around here is those chain store pizza joints...just crappy pizzas.

I'm not even going to bother replying to this....lol.

You are overestimating @Marcel's mechanical acumen, if he can't fix it with a hammer then he can't fix it.

Here's the official maintenance from Kawi.... Still...piston and rings every 40 hrs...to prevent catastrophic engine failure ...

Anyway don't know much about these 450 4 stroke..other than power wize , its on par with a 250 2 stroke and if the engine blows up , it cost a fortune to repair...i guess you'd be better just buying a new bike...lol Piston rings at every 15 hrs....you've got to be shitting me....lol.

Wish I could have taken a better pic of the drain plug hole...three or four threads in it opens up...looks like a drain for one of the side cases...so when the oil plug is fully in...almost half of the length of the drain plug isn't engaging in anything...who ever will be drilling that out will have to be really careful the drill shoot to one side...

The only thing I have on hand is heli- coils...yes and insert would be definitely better...but Im not buying a kit for it...lol...i guess the local yamaha dealer has a insert kit on hand...told him to bring it there... He needs to get himself a proper torque wrench...the crush washer is so flatten out...its fused to the drain plug.

Looks like there's plenty of space for a repair. I'd go insert rather than a heli-coil. Fire compressed air in the oil filler while cutting a new thread, will keep the alloy coming out. Filler not bloody filter

Don't really know the kid , but don't know who's more stupid...the kid or the salesman who sold him this bike.... think he's a kid from a single parent household.

Not sure exactly what he was thinking of buying a full on race motocross for trail riding....looking at the bike maintenance schedule...lol. Looking through the manual...kx 450x ...don't appear to have any type of warranty... Replace piston rings every 15 hrs....lol.

Really don't need the headache to mess with....have no idea if those KX have somekind of warranty...or to get the blame if the engine fails down the road...lol....told him to take it to the dealer where he bought it...