I just picked up a '74 R90/6. It runs and shifts terrific. Only issue is that neutral is tricky to find. Letting the clutch out, the gearbox lets out a rattle until I fiddle with the shifter a bit till it's all the way in neutral. I have read that this is a common glitch of this gearbox. The only other things I can find about the '74 5-speed is weak pawl spring and weak kickstart gears. There is a transmission tech day coming up so I'm wondering whether I should break this box open and go through it, or leave well enough alone. I opened up my /5 4-speed box and everything was in such great shape I just sealed it back up. Any advice on the /6 box? Mileage on the bike is unknown, but it looks like it's been cared for.