Originally Posted by
crank_addict
May not apply to the bikes above but caveat '81 Trek 610/613/614 and '82 Trek 613/614 because the Ishiwata CCL fork crown does not have a proper lug point so it is a failure vector. The 412 has the same Ishiwata 0265 forks as the 613/614/616. May have to dig and research but believe they were recalled.
That's not a problem with this model. That Ishiwata CCL fork crown appeared on the 600 series in '81 and '82 and the 400 series from those years. I picked up an '81 412 which I ended up using as a parts donor because of the potential fork issue (although the fork on mine is in perfect shape).
Here's a pic of the CCL fork on my 400 series Trek and the chrome moly investment cast fork crown on the '79 Trek 510 which has very short tangs as well. The light blue is the CCL fork crown; the dark blue the Trek 510 investment cast fork crown. The investment cast 510 fork crown is just a nicer quality crown. If you look at the 3d image below, it has the tech specs for the '79 models including the fork crown.
Ishiwata CCL fork crown
Trek 510 investment cast chrome moly fork crown with integral tangs
