Agostini Air Box Breather Box for Moto Guzzi LeMans I, II, 850T, T3, 1000SP 200007150 Drum Works great with bench seats

Works great with bench seats

Chrome Plastic Housing

It's also a good idea to replace your cylinders even if your current chrome is ok

Replica Brembo 12mm master cylinder

Agostini Air Box Breather Box for Moto Guzzi LeMans I, II, 850T, T3, 1000SP 200007150 Drum Works great with bench seatsGenuine Agostini breather box fresh from Mandello del Lario for your LeMans I, II, or 850T, T3, 1000SP, etc. with pod filers or without oil vapor return. This might be the solution if you are tired of your bike puking oil out of the breather box. Due to the larger volume of the Agostini breather box, the oil might separate better, and the oil return may be improved. I can't guarantee this will solve your oil spewing problem, but it might. Set includes