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FJR Motorcycle Forums
Technical & Mechanical Problems
Engine dies when hot, slow moving, uphill, at elevation (KrZy8)
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<blockquote data-quote="RossKean" data-source="post: 1368070" data-attributes="member: 19880"><p>SOMETHING caused the system voltage to drop. Insufficient stator output at RPM, bad stator, bad R/R, bad battery, bad connection, some unknown fugitive load...</p><p></p><p>Did you check voltage with the ignition off (no excess loads)? It might be 12 V only when (over)loaded with fans etc. and insufficient RPM and come back to 13+ when loads are removed - enough to restart. Does the voltage (and bike behavior) improve if you pull the clutch and keep rpm in the 3000 range?</p><p></p><p>I still think you need to look at whether the battery is in a net charging or discharging scenario (using ammeter) when you are experiencing this behavior (as well as the voltage). I think the root problem has to do with power. 12 V will operate the injectors and computer but just because there is 12 V at the battery, it doesn't mean there is sufficient at all parts of the wiring harness (ECU, coils, injectors).</p><p></p><p>I HATE electrical issues - especially intermittent ones. Much easier to fix if you find a dead short (or broken wire) somewhere. Good Luck.</p></blockquote><p></p>
[QUOTE="RossKean, post: 1368070, member: 19880"] SOMETHING caused the system voltage to drop. Insufficient stator output at RPM, bad stator, bad R/R, bad battery, bad connection, some unknown fugitive load... Did you check voltage with the ignition off (no excess loads)? It might be 12 V only when (over)loaded with fans etc. and insufficient RPM and come back to 13+ when loads are removed - enough to restart. Does the voltage (and bike behavior) improve if you pull the clutch and keep rpm in the 3000 range? I still think you need to look at whether the battery is in a net charging or discharging scenario (using ammeter) when you are experiencing this behavior (as well as the voltage). I think the root problem has to do with power. 12 V will operate the injectors and computer but just because there is 12 V at the battery, it doesn't mean there is sufficient at all parts of the wiring harness (ECU, coils, injectors). I HATE electrical issues - especially intermittent ones. Much easier to fix if you find a dead short (or broken wire) somewhere. Good Luck. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Engine dies when hot, slow moving, uphill, at elevation (KrZy8)
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