fork springcovers

[will_curry]

The HT uses BSA fork yokes.

Later pre-unit Gold Stars used a simple fork spring cover which fitted up under the bottom yoke
and seems to have been retained simply by the action of the fork spring. These BSA covers
might be made to fit as the springs and oil seal holders on the BSA forks are (more or less)
the same as those fitted to Ariel forks.