I was riding for 30 minutes and got back to the house once I pulled in the garage antifreeze was pouring out the bottom. I took the fairing off and the hose that connects to the reservoir tank was squirting antifreeze out and the reservoir tank water was bubbling inside. I inspected other hoses and they were dry. I dont have a clue what this could be.

 

Pressure check, or just replace, the cap. It needs to hold pressure. Make sure the fan comes on as well. Hope its not more serious.

Was it really overheating, or just blowing out coolant?

 

The red light came on 252 up to 256 and turned bike off and the resevoir was boiling water. How do I do a pressure check. The fan does come on.

 

What was the temp?

My 06 F4i did that earlier this year when I (foolishly) rode for abbout 20 blocks in stop and go traffic at about 15 mph tops. Bike hit about 235 by the time I got to my destination. Topped off the reservoir with a bottle of mineral water to get home, flushed the radiator / reservoir and burped the rad. Hasn't happened again.

If you do not know for certain that the radiator has been flushed (ie: you've done it yourself), chances are very high you still have the coolant from 2006 in her. It's like brake fluid: something a lot of people tend to forget until forced to remember. Old coolant + air in the radiator = overheat for little reason. Before you run out buying parts or tearing it apart, try a flush and burp first. It's cheap, simple and should be part of your maintenance routine anyways

 

Took the cap off and noticed some grey gunk was greasy never flushed the system i will try this but what is the grey gunk will it come out

 

Just about any auto shop should test it. Take it to where you take your car. Probably even for free.

It is overheating. You can try changing the coolant. But if that doesnt work, then you need to check the thermostat, radiator flow, and the head gasket.

 

Didn't see the temp till after I posted. The grey gunk could be anything or nothing. Without knowing what the coolant looked like before (having put in fresh coolant yourself) it could be just gunk from age, the results of mixing coolant types, something from the engine or anything.

Honestly, the place I'd start is the coolant flush. With a known starting point (good coolant in, rad cap tight, no air in the system), I'd take it for a ride in the CITY. With normal traffic patterns, lights and stop signs I don't get over 225ish with the fan working. If the temp starts climbing past 230, I'd start suspecting a bigger problem.

With the 'gunk' in the coolant, I would also add something to whatever I used for the flush (like white vinegar or radiator flush products from an auto parts store) and keep flushing it until I could put a garden hose in the radiator and get a consistent clear stream of water out of the radiator.

 

Blown head gasket was the problem. What I ended up doig was ordering a new engine off Craigslist and do a engine swap. The head cylinder was cracked and warped.