sx-f

Hi, I'm thinking about purchasing a 2011 250 sx-f , but have read a lot about trouble starting them from cold and ktm not being able to do nothing about it. was just wondering if there was anyone on here who hasn't had that problem and it's more an isolated thing, dont want to pay out nearly 6k...

I have a ktm 250 sx-f (2006)... previous owner put in 15W- 40 SEMI synthetic oil into the bike, i know for a fact it should be fully synthetic. I have some Mobil 15W-50 motorsport fully synthetic oil in the garage and was going to use that. Will that be ok or shall i keep the current oil in...