oil light

Bike was going well, recent engine rebuild and lots of new parts. Took it out for a ride and oil light came on though level seemed okay. Now when I start it there's and engine rattle and the oil light comes on, but then both dissappear as it warms up?

Clutch was slipping yadda yadda, i bought new plates all 14(?) of them, excluding the double plate for my '78. While i'm inspecting the old friction plates i notice that the material is nearly gone on some of the friction plates. I had also noticed the oil light coming on while the motor is...

Hey Guys looking at for some insight on some issues that I am having with the bike I just bought. So I bought the bike running took it for a spin upon purchasing it runs great the idle does sit high at 2,000 RPM when warm. The bike does not idle when cold, the bike starts right up though but I...