I just encountered similar issue when changing from stock flywheel to thinner Hays billet flywheel. I added a 3/16" spacer to pivot mount to get my correct geometry back (did not want to just lengthen z-bar to fork rod, to "make it work"). Adding spacer was actually no problem at all, work room was adequate. The hard part was reinstalling fork. I had to slightly enlarge front of bell opening (work room NOT adequate, ha ha) to be able to squeeze fork over pivot and on bearing. Came out perfect, though.
