I looked at it a bit more today since its light outside and when i looked close i found oil on the right side of the pipe where it goes into the silencer. And i pulled out both plugs and they were wet with black oil on them. I changed the plugs and i choked it and it fired right up, both sides and ran fine and i turned off the choke and after it ran for a second the left side fouled out again. Could i be runing too rich? i didnt change a thing at all except that timing key. I have b-cool head with 20cc domes and my carb is a 35mm trinity carb and i have a 50pilot jet and i think its a 170 or a 175 main. any ideas??