Here’s how to remove the air injection system on a BMW Airhead. From Clymer’s BMW R Series: 1970-1994: “The air injection system injects fresh air into the exhaust port in each cylinder head adjacent ...
If you've ever listened to the sometimes raucous cold start-up sequence of a modern car, you may well have noticed that it suddenly quietens down after a minute or two. Listen to the same car start up ...