[alfa] tensioner screwup fix

["Scott Johnson" <scott@xxxxxxxx>]

Just got done with my valve adjustment, in which I made the classic 
bonehead move of loosening the tensioner bolt with no chain in front of 
the tensioner. The thing sprang out of the head like it was catapulted, 
promptly "losing" the wedge bit inside.

After many groans and "you dumb sh*t"'s and "I'm so glad Fred can't see 
this now"'s, I had an idea. I fished out the wedge with a magnet, then 
took some gel-type superglue and used a tiny bit to glue the wedge to 
the tensioner. Took some finagling, but eventually I got the tensioner 
back in and the superglue worked like a charm, holding it firm enough 
for me to replace the tension bolt without removing the head.

The secret is that superglue has excellent tensile strength, but very 
poor shearing strength. This is *exactly* what you need in this 
situation... the tensile strength keeps it from falling off while you're 
placing it, and the poor shearing strength means the tensioner spring 
will have no problem breaking the bond once everything's in place. Just 
two drops was all I needed.

Apologies if this has already been discussed before. It's how I did it, 
and just wanted to make sure it got out there.

Scott Johnson
71 1750 Spider
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