Harley-Davidson motorcycles use a single-fire ignition system, in which each spark plug fires once per revolution of the engine. This is in contrast to the multi-fire ignition systems used by most other motorcycles, in which each spark plug fires twice per revolution of the engine.
Because Harley-Davidson motorcycles use a single-fire ignition system, they do not need a camshaft position sensor. The crankshaft position sensor is sufficient to provide the engine control unit with the information it needs to fire the spark plugs at the correct time.
Here is a more detailed explanation of how the ignition system works on a Harley-Davidson motorcycle:
1. The crankshaft position sensor (CPS) is located on the engine crankcase, and it detects the position of the crankshaft as it rotates.
2. The CPS sends a signal to the engine control unit (ECU), which uses it to determine the position of the piston in the engine cylinder.
3. The ECU then uses the CPS signal to fire the spark plug at the correct time.
The CPS is a critical component of the ignition system, and if it fails, the engine will not be able to run.
Here are some symptoms of a failing CPS:
* The engine may stall intermittently.
* The engine may run rough.
* The engine may not start at all.
If you are experiencing any of these symptoms, you should have your motorcycle checked by a qualified technician to determine if the CPS is failing.
