Help please!!! Getting some milky oil finding it's way to the air box and leaving via the breather pipe. Thought it was previously down to oil level too high, but this was recently changed and level is correct. Engine does sound a little rough, especially when cold. Carbs appear ok. Could it be something to do with gasket or pistons? Also using bit too much fuel. Any advice welcome!

If there is oil in your air box it is likely coming from the breather tube. Excess crankcase pressure will force oil into the breather tube for relief. If it is milky that means water has mixed with the oil. The water could have already been in the air box. Worn rings will add increased crankcase pressure. Is your bike liquid cooled?

It does appear that your crankcase is pressurising and blowing small amounts of oil out. This can mix with any dampness in the airbox and turn white. It is more likely that your cylinder head gasket has blown and is forcing water into the crankcase with the same effect. Check your fluid levels. If the sump oil is high, then you have a problem. Coolant water low = problem. Low compression on any cylinder = problem

It could also be that you have been wheelying the bike too much and the oil is a symptom of that.

It does appear that your crankcase is pressurising and blowing small amounts of oil out. This can mix with any dampness in the airbox and turn white. It is more likely that your cylinder head gasket has blown and is forcing water into the crankcase with the same effect. Check your fluid levels. If the sump oil is high, then you have a problem. Coolant water low = problem. Low compression on any cylinder = problem

It could also be that you have been wheelying the bike too much and the oil is a symptom of that.

Thanks. Sounds like you could be right. Bike is air cooled. Have noticed the sump sight glass looks cloudy and could be contaminated with water; also found spark plugs 3 and 4 are slightly oily. Could this be another symptom? Is this a big and expensive job to do yourself?