Last week I complained to Vintagecb750.com about a set of new fork caps that only screwed into the new tubes a half turn and then stopped. I stripped all the chrome off the threads and then worked them with a metric thread chaser file. With some good anti-seize compound, I worked them in and out a few times and they were just “acceptable”.
To their credit, I received a written apology, followed the next day by a set of new tubes and two sets of caps! New caps threaded nicly into the tubes I’d already assembled, so nice “spares” on my shelf. This week I plan to finish the front end!