gear selection

About to reinstall the rear cover on my triple bypass project and I'm checking the gear shifting as per the old triple bypass page on the wiki (which appears to be offline at the moment). The 5th gear position is not advancing all the way into the slot on the shift drum cam plate as it does on...

Have just completed the 'triple by-pass' on my '80 CX500A. Before I install the rear cover, all the threads say to check that the gears are all there but I am unable to get any by turning over the motor and pushing either up or down on the selector lever. No disassembly of any gear selector...