07 kx250f runs hot and loses power

My son rode his 07 kx250f yesterday and it seemed to get hot after a short time and seemed like it was losing power.

It has been running fine but that happened yesterday for the first time so we shut it down and went home.

This is our first modern 4 stroke so I was wondering whats up? Since you guys know these bikes I thought I would start here.

Any ideas?

Are you loosing coolant ? could be a blown head gasket.

If not possible water pump failure.


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