I have an RD 350 LC with the YPVS engine in it, i am having troble with the idleing, the left hand carb is fine no probs, it will deliver fuel to the right carb with out any problems, the jets are all clear, when starting the bike from cold it will supply fuel with the choke out but when it warms up and you turn the choke off it leans out and stops supplying fuel, but it will run fine at any other revs, help anyone got any ideas