LCGB Forums

HI all.
what is the preferred method for repairing M4 thread for headlight rim on headset.
not enough room to put in a helicoil??

think i saw pop rivet the hole then tap the pop rivet

On the SX headset the thread is 3mm, I seem to remember.
The threads on my headset top were knackered so I tapped them out to 3.5mm, the size of electrical socket box screws. Any good electrical wholesaler will have a 3.5mm tap.
Not sure if this would apply to all headsets though.

cheers, its defiantly M4 thread....on a GP....
Looking at different inserts, on web.

I've done a gp not so long ago

Bought the correct size rivnut (m3 or 4) - you can get ss or ali
Drill out the hole to accept the rivnut
Insert the rivnut and add some epoxy glue around it.

worked a treat

I got a lad to ally weld a knackered headset hole. It was huge / knackered and put a blob (techincal term) I then just drilled and tapped a new thread.

CHEERS LADS
Found some self tapping inserts, hopefully should do the job.

I would be wary of putting any inserts in that require the use of a pop rivet gun, could crack the ally, I have always found the pop rivet head method works quite well, put in from behind

used rivnut in my gp headset worked a treat

SORTED THE PROBLEM....it was originally M3 thread ....opened up to M3.5 ...sorted
CHEERS

Depending on the damage,
brass inserts with thread lock can also work fine.