My 2007 Vmax-1200 starts OK. Runs OK. The battery is unable to rotate the engine when hot and radiator fan is ON. The battery seems absolutely OK when bike is cold. Do I need to change the battery or is this a normal phenomena with Vmax-1200?
Great suggestions Sean but I'd like to add to your second point of adding a inline fuse (30 amp) close to the battery. Make sure to use at least a quality 12 ga wire as well.http://www.vmaxforum.net/showthread.php?t=19108
read this over
I think there were three things t hat cause this if I remember right,
1. Factory crimp from r/r to battery, 2. Plug in r/r line to battery cut out (direct run to battery)
3. Plug from stator (cut out and solder).
If that doesn't work you should test your stator to see if it is working right. You will have to test it cold and hot loaded and unloaded.
Sean
Question: Can you accurately check the battery voltage right after charging? I read somewhere that you need to wait for the surface charge to dissipate? or can you bleed off the surface charge somehow and check immediatly?Battery first. Always. If it's not tip top then all the troubleshooting in the world looking for "other than battery" problems is meaningless.
You can have it load tested.
OR
You can read the voltage with motor not running, should be at least 12.5 or so, leave the meter on it and start it while observing battery voltage, your looking for the voltage dip while cranking. Voltage shouldn't drop to less than 10.0-10.5 minimum.
That constitutes a poor mans load test.
But a real load test is better.
Question: Can you accurately check the battery voltage right after charging? I read somewhere that you need to wait for the surface charge to dissipate? or can you bleed off the surface charge somehow and check immediatly?
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