I have a cns v3(i think) comes with all the extra hoses and blue cone filter, the problem is very fast idle AFTER riding for a little while...i let off the throttle pull in clutch and it doesnt want to idle down, u can barely adjust the idle screw and itll come down (like 1/4 turn), ive give up on mine and replaced it with a delorto clone, problem solved, but now the wifes bike is starting to do it...ive read the threads and thought maybe its a air leak but ill be darned if i can locate it...carb is tight as i can make it on intake and the white plastic insert is 90 deg from the nut n bolt on the carb,manifold is tight and gasket looks good...i thought maybe the cable is hanging up, but it springs back, everytime and looks right in the top of carb, seems to do it only after warming up and running for little bit, maybe the cylinder or manifold is warped or not flat? and only shows after getting warm?