motorcycles using three brush generators often have battery problems as well.
Many of these problems are a direct result of the improper voltage and amperage
output of the generator. The three brush system does not limit, or control the
generator voltage output. The battery is essentially the voltage regulator.
The third brush does limit the current, or amperage output of the generator.
Due to the inherent difficulty of accurately setting the third brush correctly,
the generator current output is often too high. This results in an overcharging
of the battery, so battery voltage increases and the acid begins to boil. This
leads to low liquid levels, leaks, damaged paint, overheated battery plates and
eventual battery failure.
some suggestions for optimizing battery performance:
Installation of a good, accurate
voltage regulator will significantly improve battery life, help prevent leakage
of battery acid and also allow use of a gel type battery.
Purchase a high quality lead
acid, sealed lead acid, Gel, or AGM battery. Select the largest AH (amp-hour)
rating that will fit in you battery enclosure.
Maintain proper water and charge
levels at all times. Purchase a good battery tender, or maintenance charger and
attach it whenever the battery is sitting idle for any great length of time.
Periodically check battery
terminals for tightness. Keep the battery terminals, enclosure and all battery
surfaces clean and free of corrosion at all times.
Avoid conditions of prolonged
discharge, especially in cold weather.
The Splitdorf generator is designed to work best with a 15 amp-hour lead acid battery. This is an odd size, no longer available. However a 12 amp-hour lead acid battery may still be available from some battery dealers as a special order. Look for # B49-6. These batteries fit well in the pre-1932 Indian, Henderson and Excelsior battery boxes, and are 6 3/8" tall by 3 1/2" by 3 1/4".
can be used; however, the voltage may run higher than 7.25 with no load on the
system, which could potentially damage the battery. Gel-Cell batteries can also
be used with this regulator; however, with smaller batteries, the no-load
voltage may run higher than desired which can damage the battery.