Adjustment method of BMW waterfowl valve

The valve adjustment of BMW Waterbird is the ignition sequence adjustment, and the ignition sequence is 1, 5, 3, 6, 2, 4. When the piston of the first cylinder is at the top dead center of the compression stroke, the valve adjustment sequence is: one, six, five, four, three, two pairs, exhaust, no, advance, that is to say, the intake valve and exhaust valve of the first cylinder are all adjusted. All valves in the sixth and fifth cylinders have adjusted the exhaust valves. The intake valve and exhaust valve of the fourth cylinder are not adjusted. The third and second cylinders only adjust the intake valves.