I recently bought a 1983 GS450e that is having trouble starting. Basically, I have to push start it every time I want to ride it. Once I get it going it has idle issues until it is warm. If it's cold and running, I give it gas and the engine will race up to around 4000 rpms and slowly creep down to a normal idle. After it is warm it runs great. I cleaned the carbs three different times, and replaced the plugs, wires and battery. One other notable thing is that the left (driver side) spark plug is getting a little fouled with oil and the left exhaust is dark.
Any ideas on how I can make this start more reliably???