hi, ive noticed on my 09 660x every now and then when I throttle down to approach junctions etc that my bike pops/backfires then engine cuts out, it starts straight away again, but has done this twice today and a couple of times in the past, bike is factory standard, ive only done a few hundred miles since I bought it second hand, it was one owner from new , mileage is now 9000, full history, untouched un tampered with, previous owner never used it for last year and a halve, in mint condition for age, it passed its first MOT , changed oil, coolant, brake fluid, plug, had it on a few runs with no problems, great miles to gallon, just every now and then it does this, anyone any ideas, unfortunately I am not mechanically minded, but I have a mate who runs a motorcycle garage for repairs etc, but he is away at moment, its not that much of a hassle but done it tonight when let throttle off coming up to a sharp blind bend in built up area , so its not ideal , anyone else experience this problem? thanks for taking time to read this,