Honda took the phenomenon, controlled it and built a bike around the principle (told you I admired Hondas engineering).
From: Honda EXP-2
"Honda has tamed pre-ignition; on the EXP-2 this auto-ignition is computer controlled to enhance performance and most importantly virtually eliminate pollution. Usually thought of as a bastion of four-stroke technology, Honda's new two-stroke design promises less pollution, better fuel economy and most important, no loss in power.
Pre-ignition will destroy a normal two stroke. It is caused when the temperature and pressure in a cylinder builds to a critical point and the air/fuel mixture ignites prematurely in a violent explosion rather than in a controlled burn.
The premature explosions are ignited either by red-hot engine parts or highly ionized reactive molecules left from the last exhaust cycle. Using premature combustion to more thoroughly burn the mixture is not a new idea -- diesels don't have spark plugs either. But it's the first time that auto-ignition has been successfully applied to a gasoline two-stroke. Above idle, and below 40 percent throttle, the spark plug is not used. The exhaust power valve automatically regulates combustion pressure, guaranteeing that pre-ignition will start and end at the correct time. Once the critical pressure is reached, the reactive molecules act like millions of tiny spark plugs, firing the mixture much more evenly than any single plug could."
