please help i have a tm racing 125cc 2 stroke dirtbike, the oil is pumping out of the crankcase breather pipe, i have topped the oil level up and checked the oil level is correct by opening the oil check screw on the side of the crankcase and draining any excess oil out, but the oil keeps pumping out the breather pipe more so when i rev up the engine, has any one got an idea what i should do to cure this problem.

frederick donaghy, April 2006

make sure you have the right sort of oil in it,it should be a mineral based or semi synthetic 10w40 oil .some oils have alot of detergents in them and this can cause frothing which makes the oil volume increase and causes the breather to fill with the excess oil.how much oil do you have in it it would usually hold about 600ml so if its much more than this it could be the problem ok.good luck .adam

adam bike doctor, April 2006