Quote: Oil or carbon fouled plugs? If carbon then is ignition problem or carb is dumping to much gas. Any exhaust smoke? If so what color. Really should take a vacuum reading then choose the power valve. Plug wires? New and not touching the exhaust anywhere?
Carbon Fouled, get blueish colored smoke when starting cold but doen not smell like oil burning, only lasts a second or two. I figured it was rich from choke being closed. Plug wires are new, everything is new!! Wires are not touching the headers. I fouled a set of plugs out in 14 miles of cruising 35 MPH avg, goosed it a couple times.
