im guessin the chinese oil that comes with the bike is **** so i gotta replace it, been puttin it off 4 2 long, i got a 125, 4 stroke DUCAR, what is the best & stuff? wat do u use??
i got told buy the seller that sold me my 125cc to use 10 -40w but 15- 40 should be fine and to use mineral not sethetic no good because it has an additive in it and can make the cluch slip say hello to cheap oil oh yes