I deal with stripped threads almost daily as I work on a lot of older bikes.
What I have found is that those replacement stainless steel sump bolts that people who are obsessed with blinging their bike with, are often a curse.
They are very unforgiving with aluminium sumps. A sump plug should be mild steel. Stainless doesn't really belong in any aluminum thread unless it's very low torque. It's much harder, sharper and because they usually come from Chinese sweat shops, the manufacturing processes aren't great either.
If I think back, probably 90% of stripped sumps I've had to repair have been fitted with Stainless steel sump bolts.
Although this could also be down to the fact that those bikes which have stainless plugs have been "over-tampered" with by owners with more enthusiasm than skill.
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Did some trips.
Rode some bikes.
Fix them for a living.
Can't say anymore.
Last edited by *Touring Ted*; 7 Mar 2021 at 19:10.
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