I have change the brand of air filter oil that I use on the bikes. Was not happy with oil that I was using. The bike is a two-stroke bike.The question is when I try to start the bike for the first time. I have to give it 1/4 to 1/2 throttle to get bike started. Don't that tell that the slow jet is to low. Your input is greatly appreciated.

Uptmor250r[img]i/expressions/face-icon-small-confused.gif[/img]

 

It sounds like you are running too rich now. Did you put the oil on too thick? Its really not a big deal that you have to open the throttle a little to start it. Most have to use the choke to start. MAybe once the oil gets worked in it will start easier.