stalling

[ddtwelve]

after the winter gloom if having the tps replaced I'm having problems whilst at a standstill at junctions not all the time thou bike seems to stall every now and then I wonder if the lamda or oxygen sensors are fouled up due to soot when the bike was running over rich when the tps was broken ?
also seems very irratic at idle when this happens usually running below 1000rpm
can the sensors be cleaned ???

 

[Greyscout]

I would suggest connecting a GS911 to the bike, take a look at the readings on the two lambda probes but also make sure that your idle control valves are both working properly.