Heya

I asked the same question about 6 months ago when i brought my second NSR, i mentioned on my thread about the bike that it to had no hose off the gearbox vent, then theorised at that at some point if the crankcase became pressurised due to a sealure failing between the crankcase and the gearbox the oil/air/fuel mix would come out the vent, eventually covering the rear tire, but i'm not sure if this is physically possible. I do know on the motor i have that gearbox oil seems to seems to be escaping from everywhere else on the gearbox except the vent though. So tired of the permanently expanding green pool under it. The gold standard has go to be what honda did when they left the factory.