I change the gear oil every year and it looks like crap. The oil breaks down quick so I now change it twice a year so it isn't so bad. I get small crush washers from cycle gear. I recommend replacing the crush washer every time. I stripped out the gear box and had to put a time sert in to fix the threads.
As for the sound did you check your valve springs? I would imagine it wouldn't run as good as it does with a broken spring but I would still check them.
|