Topic: Bike Running really weak before warmed up, whats the problem?

[Ceej]

whatsup gang,

Im having a bit of trouble with my 74 cb750.  The past couple days when i started my bike up, it ran severely weak and would barely idle  for about a minute, there was signifigantly less power than regular(maybe not running on all cylinders??).  But after about a minute, it goes back to running fine, like someone flipped a switch.  I had this happen once before a couple months ago when the bike sat for about a month without being started, and now it has happened two days in a row, and I had been riding regularly.  After this period of bogging, the bike runs fine for the rest of the time.  Any Ideas?

Thanks
CJ

[TwoTired]

Fuel contamination?
Sticking float valves/ floats.

Check the heads pipes for even temps.

Check spark plugs for fouling.