The Ninja 300 had stalling issues when the clutch was pulled in especially when the bike was still cold and especially going down a hill meaning the rpms were high, then dropped suddenly with the clutch pull. Kawa did a recall and replaced the 2013 ECUs. Stalling in traffic and a false start could get you rear-ended. I haven't noticed a problem with my new FZ-07 yet, but I owned 3 Ninja 300s and all three had the stalling issue, including a 2014 model although it wasn't as bad as with the 2 2013s.