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HEADSET RIM SCREW HELICOIL SIZE ??

PostPosted: Fri Dec 12, 2014 2:00 pm
by Covboy
Hi - I am stripping a 1968 Italian SX150 for restoration and the long screws that secure the headlight rim to the headset bottom have sheared.

I wish to retain the original headset therefore will need to remove the broken screws from the lugs and repair the threads.

Does anybody know the correct helicoil size & pitch ?

Is it M3 x 0.5?

Re: HEADSET RIM SCREW HELICOIL SIZE ??

PostPosted: Fri Dec 12, 2014 2:53 pm
by Jono
Hi Cowboy
I had the threads on my headset strip and tapped the holes out to 3.5 mm using a tap from B&Q sold for tapping out electrical switch boxes . Then used chromed switch box screws looks like original.
Could be an option as not much metal for helicoil!
Jono

Re: HEADSET RIM SCREW HELICOIL SIZE ??

PostPosted: Fri Dec 12, 2014 4:52 pm
by Covboy
Hi Jono - sounds like a better plan !

Thanks

Re: HEADSET RIM SCREW HELICOIL SIZE ??

PostPosted: Fri Dec 12, 2014 5:29 pm
by Covboy
Ok job done - I centre punched the snapped screw, drilled it out using a new sharp 2mm drill and retapped it using 3mm tap!

S