I replaced my stator a month ago and for the first while it was running fine. Now it seems to lurch every couple kms and my tach will drop. Yesterday I stopped for a train and as I rolled through the tracks, the bike just cut out and died. It started up again no problem but showed me err-1 on my display. When I look this up it says it's an ECU issue. Could this be because of a bad fix from the stator or something entirely new?