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ktm sx 125 not starting

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hi.

iv just put a new piston in my 2002 ktm sx 125. it started first kick and ran great. 2 weeks later it wont even start.

i have a good spark and compression. even tried a new spark plug (br9eix).

iv also cleaned the carb more times than enough. i ave new petrol with silkolene comp 2 oil (40:1)

lately the weathers got alot colder, 2 degrees celcious. would this have anything to do with it.

your help would be very much appreciated.

many thanks

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I would try adjusting the air screw. I'm far from an expert,but I would screw it all the way in,then back it out 1.5 turns and try to start it. If it didn't start I would screw it in 1/8 turn and try again. I'd keep trying adjusting in 1/8 turn increments. If it starts and you are less than 1 turn out,you could probably go one step fatter on the pilot.

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will do, dont really want to get a jetting kit cause im goin to sell her.

thank you

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