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Classic Goldwing Technical Forums
GL1100
Vacuum advance and pluse generator (VACUUM ADVANCE REBUILD)
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<blockquote data-quote="scdmarx" data-source="post: 58719" data-attributes="member: 92"><p>When the ignition spark unit is driven by the camshaft, it's standard procedure to check/set ignition timing dynamically with a light after timing belt replacement or adjustment. It will normally be off by at least a couple degrees. </p><p></p><p>I can't find a good picture or exploded view, (and I don't have a motor out to look at) of what I'm looking for, but in the manual photo of the motor looking from the rear seems to show that the drive shaft for the spark advance unit might line up with the crankshaft. I don't know this, I'm just reading into the photo. If so, this would mean that the advance unit, which activates the pulse generator, is driven from the crankshaft. Translated... the spark will occur at the plug when the crankshaft is at the TDC compression stroke position (adjusted by the advance mechanisms) no matter what the valves are doing.</p><p></p><p>I just want to add that this ain't about busting balls. I'm just trying to understand how this motor works. Wouldn't it be nice to "get it right" because we understand how it works?</p></blockquote><p></p>
[QUOTE="scdmarx, post: 58719, member: 92"] When the ignition spark unit is driven by the camshaft, it's standard procedure to check/set ignition timing dynamically with a light after timing belt replacement or adjustment. It will normally be off by at least a couple degrees. I can't find a good picture or exploded view, (and I don't have a motor out to look at) of what I'm looking for, but in the manual photo of the motor looking from the rear seems to show that the drive shaft for the spark advance unit might line up with the crankshaft. I don't know this, I'm just reading into the photo. If so, this would mean that the advance unit, which activates the pulse generator, is driven from the crankshaft. Translated... the spark will occur at the plug when the crankshaft is at the TDC compression stroke position (adjusted by the advance mechanisms) no matter what the valves are doing. I just want to add that this ain't about busting balls. I'm just trying to understand how this motor works. Wouldn't it be nice to "get it right" because we understand how it works? [/QUOTE]
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Classic Goldwing Technical Forums
GL1100
Vacuum advance and pluse generator (VACUUM ADVANCE REBUILD)
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