Andy,
Only a week of enjoyable ride after the mechanic tuned my bike. My PGM-III is getting sluggish. The symtoms is missing fire (jerking.) at above 5000 rpm while the bike starts and runs well at low speed. I returned to the mechanic, he changed the spark-plugs & claimed that I added too much 2t oil. It was fine for 50 km (or one night). The jerking occurs again today.
If it's because of the 2t oil, wouldn't the starting and low rpm have problems too? But I can almost kick start everytime. I start lossing trust to this mechanic.