Spot on Craig, yeah mate I stripped the oil feed hole on my yx150 and used the thread inserts.
Do exactly what he said, have a look how deep the thread can go in, from memory I drilled a tad deeper to get as much thread in there and then just cut and file flat, defiantly use some permatex to hold it and try to bottom it out if you can just make sure that when you drill it out and tap the insert in you put it in dead straight because being a banjo fitting if its out of whack at all you'll have problems.
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