Thanks for all your help lads. I bought the bike from TW Bikesport Adn it is not a new bike it`s a few mounth old .I used to run my sherco no a mix of 80-1 so that might stop the oil leaking.
Just bought a new Beta and noticed some oil dripping out of the exhaust where it joins the silencer!, and I also noticed the clutch was a bit noisy when pulled in is this normal on Betas? Any suggestions. Thanks