I haven't used my R11s much in the last 2 months and when I did yesterday I noticed it had developed a occasional stutter or hic-cup when on idle, just a drop of revs for a split second but enough to stall it if I wasn't quick enough to catch it. No problem once on the move just annoying in town when approaching traffic lights and slowing down.
Any ideas - I'm not that mechanically minded so keep it simple.

Thanks