The WRF 250 would not idle at all. After taking it apart to clean it up, I put it back together and it will now idle, but very erraticly. Either it revs too high or too low. I have the mixture screw at 1 1/2. The carb is jetted as follow (it has a T-4 and I think the jetting job was done quite well): Main Jet: 180RD Pilot Jet: 40 Starter Jet: 72 Pilot Air Jet: 75 There are two problems: 1- The idle adjuster screw is bent and therefore it gives a resistance in the knob until it turns all of a sudden and pushes too much on the pulley 2- When I removed the mixture screw, there were no washers to be found. I wonder if the washers could not be inside the carb, but I guess not. I pushed some air and some carb cleaner, I looked with a light, nothing came out. Not the first time I disassemble that type of carb, I know for a fact the washers come down and never get stuck in there. Isn't it unlikely that the carb washers are pushed in into the carb? Frankly I don't know for sure if the kid did not take it apart before me. I am going to buy a Zipty-type mixture screw so that we can adjust a lot more easily, I guess I should really buy the new washers, am I correct? Could it be possible the bike was working fine without them? Also how many turns do you suggest on the mixture screw? That too might have been played with. I rode the bike otherwise and besides the idling issue, it is jetted fine. If I reduce the idle with the adjuster know, it seems to be ok but it ends up dying in a big hickup. If I open the throttle, same thing. What am I missing here? Thanks in advance!!!