Having Starting issues when battery voltage below 13V

CrazyBikerr · Mar 12, 2020

Follow up to original thread: Stock battery is absolutely garbage!

It seems like even with a new battery if the voltage is below 13V when the bike is off, it won't start. I have to either charge it fully or jumpstart it. Is this a regulator/rectifier problem?

Domino · Mar 12, 2020

By not start are you not able to crank it over or will it crank but not fire up?

CrazyBikerr · Mar 12, 2020

Crank but not fire up

Domino · Mar 12, 2020

I read through the other thread and have a couple of thoughts.

I noticed the bike had been sitting, how old is the fuel in the bike?

The dash voltage display seems off. My dash shows 12.1v on my battery but my multimeter shows 13.1v directly on the terminals. My battery is dying and was the OEM Yuasa, my bike is new in 2016. So I would confirm your voltages with a multimeter at the battery.

Check the charging system, pretty easy just check voltage at battery with bike running, should be over 14v.

Thats where I’d start. Then I’d consider modifications I may have done ( air filter, exhaust, mapping etc.)

CrazyBikerr · Mar 12, 2020

Did all that. Measuring them at battery. All checked out. Ran through 4 tanks of gas so far. Narrowed down to the 13V threshold

Domino · Mar 12, 2020

Original map or flashed?

CrazyBikerr · Mar 12, 2020

Original I think. I am the 2nd owner. Stock exhaust.

Having Starting issues when battery voltage below 13V

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