Hi 2Sharp,

I have Stage 1 and popping on deceleration is normal like Ken said.

Did your yellow check engine light come on after refueling? Mine did once but turned off after driving for about 15 minutes and has never come back on since. Have your dealer check it if stays on.

With regards to hard starting, an easy thing to check is to remove the spark plugs and make sure they're gapped appropriately (.038-.042 in., sorry don't have metric conversion handy). You could consider installing NGK DCPR7EIX Iridium plugs which could improve starting performance but you shouldn't have to do that. Starting shouldn't be a problem with stock spark plugs. Certainly there are other causes of difficult starting as well.

Good luck.

Last edited by Sportster; 29/06/17 04:33 AM.
2015 M3W, Morgan Aero Racing Stage 1, Garage 56 Stage 2, sport black, saddle tan, jeweled SS dash.