Hello I am new here. I was given a decent Kawasaki Drifter 340. The original carb ,a vm-32 econo-jet, is beyond repair. Luckily I have a carb (not econo or power jet) from another sled That I was able to install the pilot jet in (35). However I need some help with what main jet to install. The bad carb originally had a 180 main and a 120 econo-jet. The carb I installed has a 280 jet in it that causes the engine to run quite rich. I installed the 180 and it ran 100 times better but, to the spark plugs, puts me in fuel mixture territory that I would rather not be in. Could anyone tell me what main I should install? I would prefer it to be a little on the rich side, but not too much. I ride in between 40 down to 0 degrees Fahrenheit at about 1065 above sea level. Thanks!