hey,im new to motocross just bought an rm 125 2000 model to learn to ride on,what is the correct fuel/oil mixture ive been told 25:1 and also run it 30:1 ? when i pull the clutch in and put it into first the bike stalls if i dont give it any revs even if the clutch is left pulled all the way in,is this normal ? the bike has got a slight fuel leak when i push the bike with the engine not running it leave a fuel trail up my drive,ive been told its the overflow for the carb,ive only got 1/4 of a tank of fuel so it cnt be the fule tank over flow,is this normal ? any help or tips will be greatly appricated thanks