I have oil blowing through my air filter of my Yamaha YP125 Majesty. Bike runs well but at end of journey, oil is in air filter box and leaked out all over engine. Fresh oil change done recently and not overfilled. Any ideas?

spanner, May 2009

The only thing I can think of here, unless your bike has done a million miles, is that there could be a breather pipe from the rocker cover or crankcase area that is kinked or blocked, causing over pressurising of the crankcase, forcing oil out. Do check the oil level again though!

John, May 2009