![]() The actual advance angle will be twice what's shown. ![]() If you do get one with dial-back advance be aware that the dialed advance angle is wrong for our "wasted spark" system bikes with double output coils. Look for one with a smallish pickup, you don't have a huge length of wire especially on 2 or 3 to clamp to. Get a xenon lamp model with a pickup coil that clamps around a spark plug wire. You shouldn't see these types for sale new but I find them in garage sales regularly. I guessed that the spark voltage is too much for the lamp but can't say for sure. It works OK but the trigger wire spring tends to short to the engine oh our machines, and the ones I've had of this type didn't last long at all. The other poor type has a proper xenon (bright) flash lamp but the trigger connects to the spark plug wire directly, usually with a spring thing between the plug and cap that the trigger lead clips to. having to run a motor in a closed garage to work on it is not a great idea. They do work but the light is so dim you have to be in near-total darkness to use it. One has a neon light and you have to hook it between a spark plug and its cable, easy to tell this crappy type because of the two spark plug cables attached and no 12V power hookup. There used to be really bad timing lights available but I haven't seen them in decades. A basic xenon timing light is all you need with the basic centrifugal advancer and no vacuum advance. The advance feature has its uses but for our super-simple ignitions it is not necessary.
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