Maybe you guys can shed some light for me. I've been driving the Duc to work the past couple days. It's been running pretty darn good (I did install new plugs). Today on the way to lunch I was running around 60 in 6th at a steady RPM and it acted like it had a miss for a second. A mile or so later it backfired thru the intake (it did this yesterday but I was lugging it thru a parking lot). I know I need to do timing belts, they will be ordered today. I've heard these bikes run lean and mine appears to be stock except for the Leo Vince SBK slip-ons and removed snorkels (stock filter still). Do you guys think a PC3 is the solution or might I have another problem?