Been through all carb settings and had it to pieces many times, I feel like I can rule that out as well as plugs. New needle/jets/float - complete rebuild.
I have reversed the ignition leads to count that out. I did a compression test to find both cylinders equal. 52lb on kick.
I'm now convinced it's oil fouling, in the picture you can see the plug looks like it's painted satin and it's wet always. I have the same plug reading no matter what I do to the carburation and I've made many adjustments. I have six plugs that look the same. Again the rear is always perfect.
I have checked for wet sumping I was thinking maybe after the lead free conversion done some time ago, someone may have used valve seal and one popped off? Or a retaining screw come loose?
If any one has any suggestions before I get seriously spannering I'll take anything before I have to take down the head!
I have reversed the ignition leads to count that out. I did a compression test to find both cylinders equal. 52lb on kick.
I'm now convinced it's oil fouling, in the picture you can see the plug looks like it's painted satin and it's wet always. I have the same plug reading no matter what I do to the carburation and I've made many adjustments. I have six plugs that look the same. Again the rear is always perfect.
I have checked for wet sumping I was thinking maybe after the lead free conversion done some time ago, someone may have used valve seal and one popped off? Or a retaining screw come loose?
If any one has any suggestions before I get seriously spannering I'll take anything before I have to take down the head!