83 200X Main jet/new top end

[ctbale]

Ok, I am gettin close to having my 83 200X back together, new top end, new valves, 3rd over bore, chain etc, It had a cobra(ish) looking exh on it when I got it. (only rode it 3 or 4 mins after buying it, blew tons of blue smoke) I dont want to break-in the motor with the 110 stock jet, here in alaska I always need to richin up my carbs anyway on a stock motor. I am going to order a few jets, and wonder what you guys think, 112, 115, 118 would cover it? Again new stock 83 200X at cold sea level air with a after market muffler, start with the 115 ?? (62A carb, stock deck height/compression piston)

Thanks!

[shortline10]

You just dont really know till you do a plug chop and see were your at with the jetting . Back firing when you let off the gas is also a sign that the motor is running a little lean or the carb is out of adjustment .