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FJR Motorcycle Forums
Technical & Mechanical Problems
Did I finally kill my FJR?
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<blockquote data-quote="RossKean" data-source="post: 1451533" data-attributes="member: 19880"><p>Charge it fully and then get it load tested. Voltage is not a decent measure of overall health or capacity. A battery can show a healthy off-charge resting voltage but fall flat on its face as soon as you draw any current (open or near open internal cell) or it might maintain voltage with current draw but only for a short time (diminished capacity). It can also self-discharge over a few days or weeks due to a "soft" internal short. A healthy AGM battery should only lose a couple percent per month due to self discharge. (Excluding parasitic draw from the bike - which should be exceedingly low on an FJR.)</p><p></p><p>You can do a quick and dirty check by monitoring the voltage while starting - shouldn't drop below maybe 11V or so. This result is not definitive since a problem with a starter motor will cause excessive current draw (and voltage drop). Starter motor is best evaluated by measuring the starting current using a clamp-on DC ammeter - should be well less than 80 amps.</p><p></p><p>Make SURE you get the bike up to full operating temperature before turning it off. Shutting the bike off before you get past the normal enriched fast (cold) idle is the main cause for a flooded situation that caused your starting issue.</p><p></p><p>Congratulations on getting it going again!!</p></blockquote><p></p>
[QUOTE="RossKean, post: 1451533, member: 19880"] Charge it fully and then get it load tested. Voltage is not a decent measure of overall health or capacity. A battery can show a healthy off-charge resting voltage but fall flat on its face as soon as you draw any current (open or near open internal cell) or it might maintain voltage with current draw but only for a short time (diminished capacity). It can also self-discharge over a few days or weeks due to a "soft" internal short. A healthy AGM battery should only lose a couple percent per month due to self discharge. (Excluding parasitic draw from the bike - which should be exceedingly low on an FJR.) You can do a quick and dirty check by monitoring the voltage while starting - shouldn't drop below maybe 11V or so. This result is not definitive since a problem with a starter motor will cause excessive current draw (and voltage drop). Starter motor is best evaluated by measuring the starting current using a clamp-on DC ammeter - should be well less than 80 amps. Make SURE you get the bike up to full operating temperature before turning it off. Shutting the bike off before you get past the normal enriched fast (cold) idle is the main cause for a flooded situation that caused your starting issue. Congratulations on getting it going again!! [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Did I finally kill my FJR?
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