Why are oil leak engine oil pipeline ventilation Vespa?
Vespa engine is a vent pipe in the upper deck of the clutch / gear there is a mad rush of oil from it
Bart gets a point. But it depends on the engine, depends on whether piston rings or the crank seals. If it is a van 4 lap and racing with Piaggio Vespa / Honda engine. Then, it is likely that this is due to the accumulation of box pressure changes caused by stroke, due to a hole or worn rings, etc. If it is an adaptation of clutch 2-cycle is likely to be killed shaft seals to the housing. This could be caused by a worn main bearing or just old. But please do not follow the advice of Bart and buy a Harley!
Part 1: A Florida Scooter Girl’s Vespa LX 150 Maintenance Video