change

My 1975 Suzuki TS185 has a flat inner tube and it needs replaced. Whenever i fill it you hear an eerie air leak coming from an unknown area. sometimes i think its leaking from the vale stem itself. anyways what is are some steps to take off the rear tire because ive never attemped to change one...

I'm a new rider with an 82 Yamaha 650 Seca. I'm mechanically inclined and have changed oil on my car before, but when I changed the oil on my bike I put too much in (aboutt 1/2 a liter). I ran it on the center stand and it sounded a little funny, but the glass sight showed a little bit of air...