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Old 10-06-2007   #8 (permalink)
Mecchanica
Senior Member
SuperBike
 
Join Date: Aug 2006
Location: Honolulu, Hawaii, America\'s Pacific Paradise
Posts: 1,785
Sparx makes a voltage regulator/rectifier combo in an "egg" heat sink, going with the retro look. Mounts up under the bottom fork yoke.
The airbox mounted zener was a bad idea, as the only zeners I have had to replace have been on either custom bikes with inadequate heat sinking or grounding and on OIF bikes. There isn't enough cooling air or mass of aluminum in the immediate vicinity of the diode. Since the stock single phase alternator barely puts out enough juice at idle to keep up with demand, especially with the lights on, that the engine would overheat at idle before the zener does.
I recommend fitting a three phase if you don't already have one. Three phase stators have nine poles and three wires whereas the single phase ones have six poles and two or three wires. The three phase kit will come with it's own regulator/rectifier and the "egg" unit won't work with that alternator.
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