2020yz450f died won’t crank

korndogg75
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korndogg75
Rode 3 laps today the bike has 20 hours it died like it ran out of gas and won’t even try to crank over now anyone else out there experience anything like this. Hopefully the warranty covers it but still curious as to the cause
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korndogg75
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korndogg75 8/22/2020 2:30pm
8/22/2020 2:30pm
It’s not seized I did get it to fire once while messing with the wires but after that back to nothing at all
kb228
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kb228 8/22/2020 3:07pm
8/22/2020 3:07pm
If its not turning over its a bad battery or bad starter.
korndogg75
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korndogg75 8/22/2020 4:13pm
8/22/2020 4:13pm
Would that make it just die on the track though this is my main concern I understand the battery not turning the engine over but why did it just cut out and die
Paw Paw
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Paw Paw 8/22/2020 6:56pm
8/22/2020 6:56pm
A bad battery can pull all the electricity from the system. When a liquid cell battery fails it is most of the time from a battery lead plate breaking loose inside and when current flows it creates a dead short. This can result with a battery that shows to be charged and at about 12 volts with no load, but under load it has a voltage drop down well below 10 volts.
So the battery will turn the engine over or does it turn over and just not start?
OEM batteries are junk. If the starter does not turn it over, then first load test the battery. If it is bad then replace it with a good LI battery. If it does turn the motor over but does not start, then you may have dirt and water in the electrical connections. Pull them apart , clean and then install Dielectric grease in each and pug them back together.

Paw Paw

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korndogg75
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korndogg75 8/22/2020 7:05pm
8/22/2020 7:05pm
The bike died on the track then has absolutely no response hitting the start button it’s at the dealer now hopefully the warranty covers anything that broke I’ll update here when I find out what happened. 20 hours on a new bike is horrible for it to leave someone stranded in the middle of nowhere 👎
Rider 5280
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Rider 5280 8/27/2020 8:02am
8/27/2020 8:02am
Dang … sorry to hear this ... how did things turn out once the dealer had a chance to assess things?
korndogg75
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korndogg75 9/3/2020 6:00pm
9/3/2020 6:00pm
It was the battery Yamaha gave me a new one but I had to pay for diagnostic and install so if your bike dies just put a new battery in it. The warranty usually won’t cover battery issues I’m happy to help support my local dealer but two weeks without my ride was the issue for me 🤙
korndogg75
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korndogg75 9/3/2020 6:02pm
9/3/2020 6:02pm
And for all those out there like me if the battery takes a shit your bike will just die on the track no warning efi just goes out bike will cut off and die like you ran out of gas 👍 hope this helps the next guy save some money
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Paw Paw
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Paw Paw 9/3/2020 6:21pm
9/3/2020 6:21pm
Invest in a good Li battery to replace the crap OEM unit. They work well and last.

Paw Paw
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korndogg75
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korndogg75 9/3/2020 6:27pm
9/3/2020 6:27pm
Thank you for everyone that replied Paw Paw I appreciate the help I was stressing over it but it ended up ok 🤙
coastlinecascot 9/5/2020 11:57am
9/5/2020 11:57am Edited Date/Time 9/5/2020 11:58am
Same with a car. Battery dies it will cause your car to die. The alternator can’t keep up
harescrambled 9/5/2020 5:29pm
9/5/2020 5:29pm
Paw Paw wrote:
A bad battery can pull all the electricity from the system. When a liquid cell battery fails it is most of the time from a battery...
A bad battery can pull all the electricity from the system. When a liquid cell battery fails it is most of the time from a battery lead plate breaking loose inside and when current flows it creates a dead short. This can result with a battery that shows to be charged and at about 12 volts with no load, but under load it has a voltage drop down well below 10 volts.
So the battery will turn the engine over or does it turn over and just not start?
OEM batteries are junk. If the starter does not turn it over, then first load test the battery. If it is bad then replace it with a good LI battery. If it does turn the motor over but does not start, then you may have dirt and water in the electrical connections. Pull them apart , clean and then install Dielectric grease in each and pug them back together.

Paw Paw
Pawpaw....the charging voltage is different between Li and lead acid batteries. The two are not interchangeable. Besides, the new bikes typically don't come with lead acid
harescrambled 9/5/2020 5:30pm
9/5/2020 5:30pm
korndogg75 wrote:
And for all those out there like me if the battery takes a shit your bike will just die on the track no warning efi just...
And for all those out there like me if the battery takes a shit your bike will just die on the track no warning efi just goes out bike will cut off and die like you ran out of gas 👍 hope this helps the next guy save some money
Buy a Honda...they'll run without the battery. Suzuki's will too

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