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TR2/3/3A Gearbox drain plug threads stripped?

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K

karls59tr

Obi Wan
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This may have been covered before but what's the best way to repair a stripped out drain plug hole? I have to pull the gearbox to change out the clutch so it's a good time to do this fix. Any suggestions?
 
When I had that problem (on a non-Triumph), I had a friend TIG up the hole, so I could drill & tap. But I already had the gearbox apart. In your case, I'd probably go with one of the oversized, self-tapping plugs.

Other options include a Helicoil (but NPT helicoil kits are crazy expensive), or tapping to the next plug size.
 
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