about a year ago i got a set of syncros revolution cranks from a german here in vienna. REALLY nice chap! he sold them quite cheap (180euros including crank-o-matics) and i was totally blown away when i was holding them in hands. the howly grail was mine
i do remember those cranks from the magazines back in the days. i promised the seller to not resell them and decided to put them on my brodie road frame. the frame is going to the powder coater tomorrow. the right time to get the cranks back in shape.
the starting point:
the main issue is that they have the well known childrens rattle problem. so first step was drilling a small hole into each crank at a low stress point to check what causes the rattle effect.
OMG its rust:
yes, its definitely rust (see the brownish crumbs on the lower left corner of the second pic). guess water slipped in between the cranks and the alloy insert. next step was filling up the cranks with some wd40. flushed the wd40 then filled in some rust converter. flushed that and rinsed the crank-inner with water. next put them in the stove at 80degrees to dry properly.
don't know yet if i get them powder coated in frame color or respray them myself ni black...