How does the BMW timing advance curve work?
The BMW timing advance curve is mechanically derived, not “need” derived. The ideal timing is to be retarded enough to be just under the ping timing at all rpm. To determine that, one must have the ability to independently change the timing of each cylinder under load. Then find the optimum timing increments of 50 or 100 rpm.
Can a timing light work on a BMW / 2?
Not all timing lights will work on the magneto ignition of the /2. Nearly all modern timing lights are inductive pickup and require 12 volts. You may discover that your timing light that works great on cars won’t give a consistent flash on your perfectly working /2 BMW motorcycle ignition system.
Is there a timing difference on a BMW twin?
Correcting the timing difference between cylinders on the /2 BMW motorcycle twin. Since 1951 the BMW twin has had a magneto ignition system. It is made in such a way that it can result in a different ignition timing for each cylinder. Some call this a double image or split image.
What’s the best timing for a BMW airhead?
The ideal timing is to be retarded enough to be just under the ping timing at all rpm. To determine that, one must have the ability to independently change the timing of each cylinder under load. Then find the optimum timing increments of 50 or 100 rpm. Then what you see will be the real curve needed.
The BMW timing advance curve is mechanically derived, not “need” derived. The ideal timing is to be retarded enough to be just under the ping timing at all rpm. To determine that, one must have the ability to independently change the timing of each cylinder under load. Then find the optimum timing increments of 50 or 100 rpm.
Not all timing lights will work on the magneto ignition of the /2. Nearly all modern timing lights are inductive pickup and require 12 volts. You may discover that your timing light that works great on cars won’t give a consistent flash on your perfectly working /2 BMW motorcycle ignition system.
Correcting the timing difference between cylinders on the /2 BMW motorcycle twin. Since 1951 the BMW twin has had a magneto ignition system. It is made in such a way that it can result in a different ignition timing for each cylinder. Some call this a double image or split image.
The ideal timing is to be retarded enough to be just under the ping timing at all rpm. To determine that, one must have the ability to independently change the timing of each cylinder under load. Then find the optimum timing increments of 50 or 100 rpm. Then what you see will be the real curve needed.