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Discussion Starter #1
I have a 2017 F3 800. Bought it last year in September. Less than 1500 miles I had to replace the ECU. That was a few weeks ago. Now, I was riding for 2 hours and then I got gas and started up and then shut right down. Tried to start it again and when I turned the key, nothing happened. Now lights or anything. Got it home used the quick charge and it wouldn't charge. Hooked the leads up to the battery terminals and it says charging and than shorty after it said charged. Tried to turn it on again and nothing happened. Any suggestions?

Thanks, Levi
 

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Your battery is dead. Is it the original??? Get a Yuasa YTZ10
 

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I don't know if this is still recommended here, but I replaced my battery/ignition cables immediately after I brought mine home. Motolectric is who i went with. Of course you might already be experiencing the dreaded sprag failure.
 

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I have the YTZ10. The battery tender says it's charged
The battery tender may say it is charged (resting voltage has reached correct point) but that doesn't mean the battery is any good. Load test required.

Place a voltmeter across your battery terminals (or the charger connector, same thing).

Key off should be 13+ volts if just charged. 12.8 or better at least if it has been off charger for several hours.

press starter button and observe voltage. Must stay above 9 volts. Should stay above 10 volts. Anything less and the battery is done, bike won't start.

If the bike starts, voltage should go to 14.5 + once running.
 
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Even if I bought and installed the battery in February/March?
Yep.... if the seller had it sitting on their shelf for a long time with no maintenance charge it could have sulfated and become damaged.

I have seen countless brand new bikes come back to dealers with dead batteries within a few weeks of sale because the dealer never maintained the battery while the bike sat on the showroom floor.

Do the load test to confirm battery before you go chasing ghosts. Simple, quick and will eliminate that possibility.
 

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Discussion Starter #9
When I put the meter on it said 13.12. Then when I pressed the starter, there was no change. Even when I turn the key, there is no instrument screen that lights up.
 

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Then you have an open circuit.... Blown main fuse?
 

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It is on the starter relay... there is one active, and a spare. 40 Amp.

Do you have the owner manual?
 

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Look carefully at the wiring into the connector for that fuse block/relay. Poor connection or corroded connection there is a common cause of problems.
 
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