34:19 I was running conventional 50 weight and changing it a lot because of the hard use. IMO synthetic is worth it for longevity and that's about it. All oils today are ridiculously good. I had a rattly valve train on mine, not sure what would cause a gear whine?

pdksh: Put in whatever oil weight is good for the temp you ride in, but you shouldn't have enough clutch material in the primary oil to contaminate it between changes!? I change mine with every oil change. I wonder whats wrong with your clutch?