Yamaha yzf can't start when overheat

alexsobike · L Plate Warrior Joined: 24 Oct 2018 Karma :

Hi everyone,
When i am trying to start my motorbike when engine is cold everything looks fine,
after few seconds when temp reach to 100 degrees Celsius (212 degrees Fahrenheit), i am turning off the engine.
now when trying to start it again engine wont start, please edvice.
video added.
https://vimeo.com/296646748
https://vimeo.com/296646819

jaffa90 · World Chat Champion Joined: 06 Apr 2016 Karma :

The engine won`t start because the battery is in a low state and re-coups (!) when switched off.
I would check battery to bike connections and the charging system.
Have you a multi-meter?

alexsobike · L Plate Warrior Joined: 24 Oct 2018 Karma :

Thanks for quick response,
We already checkef the charging system.
Replaced the starter.
New battery.
Wire harness.
Coils.
Clutch.
throttle body.

Teflon-Mike · tl;dr Joined: 01 Jun 2010 Karma :

If you crank it with the plugs out... anything spray out the plug-holes?
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jaffa90 · World Chat Champion Joined: 06 Apr 2016 Karma :

Is the battery connected to the bike, also have you tried jump leads.
What `s the battery voltage when cranking like the second video using the black probe on the frame and engine?

alexsobike · L Plate Warrior Joined: 24 Oct 2018 Karma :

Copycat73 · World Chat Champion Joined: 11 Jan 2013 Karma :

how many kilometers has bike done ?
when was the last valve clearance service done ?
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alexsobike · L Plate Warrior Joined: 24 Oct 2018 Karma :

Robby · Dirty Old Man Joined: 16 May 2002 Karma :

You mentioned overheating, and getting up to 100c in a few seconds in your first post.
If it really is overheating, and getting that hot that fast, then you have a problem. Assuming it's a water cooled engine, is there any coolant in it?

tittymcarsefa... · Borekit Bruiser Joined: 30 Sep 2018 Karma :

Is there sufficient coolant in the system? shouldn't be getting hot that fast.

I agree that your battery sounds flat though, check your running voltage to make sure the bike's generator is putting out a charge (12-14v whilst running with voltage not steadily dropping) if it is then your battery is not storing the charge properly and should be replaced.