Main Motorcycle: 1994 Triumph Sprint 900
Join Date: Sep 2008
Location: Welland, Canada
Other Motorcycle: 1985 RZ350 in pieces
Extra Motorcycle: '87 Yamaha Venture Royale
|T3 Sport / Touring Forum For the discerning Hinckley Sporting Enthusiasts. Open to all lovers of the original T3 Sport Models including the Trident, Sprint, Sprint Exec, Daytona, Trophy, and Speed Triple.|
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Originally Posted by DEcosse
<...>Record your battery voltage under the follow conditions
1) Ignition off, unloaded battery.
2) Ignition on, headlights on, not running
3) Bike started, running at idle
For condition 1, should be at least in the high 12.x range if fully charged.
In condition 2, your voltage should not drop much below 12.0 at worst. (It may continue to drop – hopefully slowly! – as your lights will be discharging it. However this should be a slow decline)
If it does drop immediately into the 11’s, your battery is insufficiently charged – if it was just charged from a battery charger however, then it indicates your battery no longer has sufficient capacity to retain charge/supply current to load and should be replaced.
Condition 3 is what we are most interested in with respect to charging capability.
Voltage should be at least in the 13’s at all engine rpm. You may detect it will fall off slightly as you raise engine rpm. This is not atypical performance.<...>
Sounds like a cell is gone/going. Three years, thought you get more but that's life. I like the idea of battery tender but these (and I have one)
are always giving a little to the battery, I had mine on my old Betsy (lead acid) and it completely evaporated the acid out of it. (yes my fault for not checking)
So sometimes, I wonder are we aging our batteries unconsciously by hooking them up all the time?
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