How to Change the Coolant on a 2016 Kawasaki KX250F 

I like it. No problems yet, but honestly, I have only had it for a little while and I have not ridden it hard. I don't think you can go wrong with any of the big name bikes: Honda, Suzuki, Kawasaki, KTM, Husqie, Yamaha...EFI is nice and so is electric start. This bike has EFI, but not electric start.

Most likely your radiator cap is not on properly or the seal on the cap is leaking. If there is an air leak at the cap, it won't maintain pressure and it will boil out of the overflow. Or, you could have a head gasket leak blowing air into the system and causing it to overflow.

@@gohobby9934 I had to bleed the air out I let it run with the cap off until the bubbles stop coming up and it was fine

around 50-60 hours

Glad it helped! Do you have this exact same bike?

Do you mean after you started it up? Most likely your radiator cap is not on properly or the seal on the cap is leaking. If there is an air leak at the cap, it won't maintain pressure and it will boil out of the overflow. Or, you could have a head gasket leak blowing air into the system and causing it to overflow.

Yes, but the question is where did the coolant go? It's a sealed system, so there must be a leak.

I'm using a pre-diluted mix. Go to the 1:45 minute mark and you can see the mix I'm using.

@@gohobby9934 I think he means flushing it with distilled water