What are the key maintenance issues I need to pay particular attention to?
Change the oil and air filter on a regular basis! BMW engines do not have an oil filter, hint, hint. Two issues play into the death of Isetta engines. Number one, these engines utilize an oil slinger to lube the rod roller bearing and upper part of the engine. The slinger is basically a round disk that is attached to the side of the crank. It has a hole on its outer edge that picks up oil at the bottom of its travel and ‘slings’ it upward as it rotates. There is also a groove cut around the inside perimeter of the slinger which acts as somewhat of a runway for the oil to follow up to the hole. Let that get clogged up and reduce or choke the lube supply to the rod bearing or upper half of the engine and it’s party time, not one you want to go to either. If you’re lucky, the motor will seize up. If you’re not lucky, your crankshaft and assorted giblets will be waiting for you back in the middle of the intersection you just went through. Number two, not changing the air filter just makes
