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A highly popular bike series produced by Yamaha from 1987-1995 including the Genesis and Exup models.

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Battery drains on low beam

I have a problem, yamaha fz1 2008 battery 14v when on, when i turn it off it starts loosing it... when i leave and drive on high beams all good, when i drive or leave it on low beams it wont start. It jumps with cable like after milisecond...

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Guys thank tou so much on a support, i will check the video so that i know in future but only problem i got now is that high and low beams are swiched… i guess i will find the resolution. And i might as well check for parasitic draw… one love!

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How old is your battery? 14 volts is too high of a charging rate. Should be closer to 13.5 volts for proper charging. Should be close to or exactly 12 with bike completely off. Not sure if your bike consumes battery at very low rates normally when shut off, this is very common in modern bikes with all sorts of electronic gadgetry. If battery is new I might try checking drain when off with a clamp over ammeter to see if something in draining the battery at a suspiciously high rate when off or something like that.

https://www.harborfreight.com/1000a-t-rm...

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Check for a parasitic draw This video shows how if your unfamiliar with the test . Once you’ve isolated the circuit test the continuity of the wiring of the circuit . You mentioned the low beams being the problem . If this is the actual culprit you may want to start with replacing the socket and checking ground for the socket. You may also want to check the ignition switch . If your bike sits outside and is exposed to the elements the key hole can actually be an entry point for corrosion of the ignition wiring if the spade that covers the key hole is doesn’t retract properly when the key is removed. You may want to replace the light bulb as this could also be an issue. But before doing any of this do the test as it may just be coincidence that the low beams are on when the battery dies. Hope this helps

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