Question about 1993 Harley Davidson FLSTF Fat boy
Most people do not set the VOES unit. They simply purchase a new one that is already set by the factory. However, since the FLHCU is a heavy bike, I'd set the VOES at about 5-5.5 inches of vacuum. If the bike spark knocks when you roll on the fuel in high gear, try taking to a bit higher setting like 6-6.5. This will cause the VOES to change state and roll back the timing sooner than the lower setting. Of course, for maximum performance (fuel mileage), you should adjust it lower until you start getting spark knock and then come back up just high enough to prevent it.
Posted on Nov 06, 2010
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Posted on Jan 02, 2017
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