I wondered if this is a normal trait of the bike. I have a 2014 ES with under 10k , when I ride the bike and its cold it is fine when pulling away from traffic lights, junctions etc. after about 10 minutes it starts playing up . When I go to pull away the revs drop and the bike stalls, but ...... When the bike if fully warmed up and after about 35-45minutes of riding it goes back to being perfect again? Very Strange.