S4R (996) Hoses Contracting on Cool Down

[Steve.In.Atlanta]

I just got my S4R a few weeks ago and just noticed that my cooling hoses contract when it cools down. Is this normal or is there something that needs fixing?

[Speeddog]

You mean like sucked flat?

[Steve.In.Atlanta]

You mean like sucked flat?

Yeah, pretty much so.

[minnesotamonster]

Mine did this once. I had air in the system. Opening the radiator cap and letting the bike run for a bit let the air out and it hasn't happened again since.

[Speeddog]

When the engine is cool, take the radiator cap off, make sure the little center poppet valve isn't stuck.

I'm pretty sure the cap on the overflow tank has a vent too, make sure that's functional.

[Steve.In.Atlanta]

Mine did this once. I had air in the system. Opening the radiator cap and letting the bike run for a bit let the air out and it hasn't happened again since.

That did the trick. Thanks everyone for the help.