JohnnyBusa90
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Yeah. Im pretty sure I burped it when I filled it up with coolant On July 7th. Didnt overheat until yesterday when i had long idles in traffic yesterday.
Hayabusa overheating?
- Thread starter arctic954
- Start date
JohnnyBusa90
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How do I propery burp the busa? What I did before was I took the radiator cap off and filled it up. Started up the busa and let it run until it reached operating temperature (halfway of temperature gauge I am assuming) all the air bubbles exited through the radiator cap opening. I dont recommend doing it this way because the coolant gets hot and expands causing a big mess lol. Then filled the coolant back up until the radiator was full but I did that when the bike was still hot.... hmmm... I suspect I might be low on coolant again.
202mphbusa
Registered
am I wrong in that once a cooling system is air free.
It should be filled cold
Coolant starts to expand and build the pressure in the system in increase the pressure/boiling point
When I fire up something I am refilling, after a minute or two the coolant level starts to rise.....and drip all over my garage floor
Doing it hot. when the system cools it will create a vacuum and draw coolant from the overflow
am I wrong?
It should be filled cold
Coolant starts to expand and build the pressure in the system in increase the pressure/boiling point
When I fire up something I am refilling, after a minute or two the coolant level starts to rise.....and drip all over my garage floor
Doing it hot. when the system cools it will create a vacuum and draw coolant from the overflow
am I wrong?
JohnnyBusa90
Registered
Oh ok. I owned a 1250 FA before the Hayabusa. Thanks for the link
JohnnyBusa90
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That sounds around right
JohnnyBusa90
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Ok. Bad news guys. I took apart the right side fairing and look inside the radiator and it was low on coolant. I filled it up but it didn't take much? So I decided to run the bike in my garage hoping that the coolant will circulate through the system. During this time the busa never went over halfway on the temp gauge. I ran the bike for about close to 15 minutes. The radiator fan ran then I discovered I had a leak :0!!! Unfortunately I didn't have the left side fairing off so I couldn't pinpoint where the leak is coming from. I just hope it's a loose radiator hose and nothing major 
. But the good news is the busa wasn't overheating when I was idling the bike. I thought it was a bad rad cap so I ordered one anyway. I did check my overflow tank and it stayed at the same level.
. But the good news is the busa wasn't overheating when I was idling the bike. I thought it was a bad rad cap so I ordered one anyway. I did check my overflow tank and it stayed at the same level.
JohnnyBusa90
Registered
Would all these white spots on my radiator cap be an indication of coolant loss?
JohnnyBusa90
Registered
Good news. I found out where the leak is coming from. It was from where the overflow meets the hose connected to the radiator. Upon closer inspection I saw that there was a lot of white residue at the bottom of the overflow leading me to believe that might be causing some sort of blockage because it only starts to leak when the temp gauge is at the halfway mark making enough pressure to open up the radiator cap to the overflow I am assuming.Ok. Bad news guys. I took apart the right side fairing and look inside the radiator and it was low on coolant. I filled it up but it didn't take much? So I decided to run the bike in my garage hoping that the coolant will circulate through the system. During this time the busa never went over halfway on the temp gauge. I ran the bike for about close to 15 minutes. The radiator fan ran then I discovered I had a leak :0!!! Unfortunately I didn't have the left side fairing off so I couldn't pinpoint where the leak is coming from. I just hope it's a loose radiator hose and nothing major
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JohnnyBusa90
Registered
I took it apart and the resovior was melted at where the overflow hose is connected. WHAT!? I drilled a a hole into where it was connected and made a makeshift heat shield. ( It looks ugly but it will be under the fairings) made sure i washed it to get all the plastic filings out. Top it between full and low. Ran the motorcycle until the rad fan kicked on and everything look normal. My question is... how did that part of the resovior melt to begin with? Does anyone else on the forum had this same issue with the Busa? When I was running the bike I touched that part of the area where it had melted and it didnt feel that hot. Hmmmm....
That melted area does seem odd. The routing of the hose touching the exhaust is also a bad idea. If that’s just simple tin foil you’re using it won’t decrease any heat. Use some of that self adhering silver or gold insulation wrap. I used it under my tank and seat.
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