March 14th, 2014, 09:43 AM
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#3
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Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013
Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes
Posts: A lot.
MOTM - Jun '18, Oct '16
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A battery can show "fully charged" but drop to unusable levels when under load.
Check the voltage after it has been off the charger for an hour or two - a fully charged 12V batter reads 12.6-7V.
When under load (cranking) it should still hold near 12.0V.
A battery or auto store can check it with a load tester, or you can hook a volt meter up to it and watch the reading change when you hit the button.
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