Join Date: Mar 2013
Location: Capo Beach, Ca, US
The tappet covers have a reed valve that should have the "air" moving from the airbox to the exhaust ports.
Even if this system is running backwards there should be no oil but only air (more specifically gasses).
How are we sure that this is the cause?
2018 Husky 701 Supermoto
2018 Aprilia Tuono 1100