- remove the petckock from the bike.
- put it in a vice like this:
- drill out the rivets very carefully, so you only get the very top
of the rivet drilled out, just the part that's rolled over the top
edge of the cover plate. I used a 5/32" drill bit.
drill only enough to get the cover off, this is like 1 mm down, or maybe
less.
- remove the top
- remove the valve, it should look like this:
you can see just how little I removed with the drill. There's still
a bunch of metal that stuck through the holes in the cover. Keep them
they're good for alignment later.
- drill a smaller hole through the center of the hole you started, using
the appropriate size bit for the machine screw you've chosen.
I used a 3mm machine screw long enough to get all the way through
the petcock, that way if I screwed up the tapping I could just put a
nut on the backside.
Then tap the hole
- clean all that crap out of the petcock.
- put the new gasket in place, it should look like this: You can get one
here.
- put it all back together. this is the way the lever should go:
- Then notice that the new screws get in the way of the petcock lever.
Doh!.
- mark with a knife on the lever how much you'll need to remove, and
take the whole thing apart again, then file enough off the lever
so it will clear the screw.
- then it looks like this when put back together:
Note that this is how I did it, if you don't have a tap and die set,
you probably should just drill right through and put a nut on the back.
