I had an issue with the idling on mine - would run perfectly, then would die at every junction and roundabout. Sometimes I could get it to 'not stall' with a little bit of choke. Always easy to start straight away.
Turns out it was the idle jet (the one facing the bonnet) that was continually clogging. Mine had sat for ages before I bought it and can only assume there was some flash rust in the tank than was being dislodged - small enough to get through the standard mahle filters but big enough to clog the idle.
I fitted a new 'cleanable' glass fuel filter, and carry a can of carb cleaner and a spare idle jet (in case I drop it when cleaning).. Quick roadside remove of jet from carb and out of the holder, good squirt of cleaner and back to normal.
The new filter seriously reduced the number of blockages (I was getting one every time I filled the tank) and with extended use I now appear to have flushed the bulk of the crud out of the tank. I've only had the problem occur once in the last 6 months or so. Easy fixed at roadside.
