Overheating cbf600 sa (2005) 35000 miles

[Hebewolff]

Hi guys, having some issues with my cbf. In December it started to get hot. Took it to the garage and they said the radiator was knackered, replaced it and it seemed the issue was solved. Started to overheat again last week so took it back. This time the Honda garage reckoned it was the radiator cap and replaced that. Ridden it out today and it's still (from my own experience of riding it) running hot. It smells hot and the temperature needle is just on the edge of the white marker where it crosses into red. I'm pretty narked off with the garage and feel like they don't really take me seriously. I'm doing a big trip into Europe in April and want some peace of mind that I'm not going to fry my engine. Do cbfs always run this hot? What else could be causing it? (checked the coolant meticulously and it's not losing or eating it in any quantity)
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Ta

[Nobby the Bastard]

[temeluchus]

It does sound thermostaty.
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Some shite cruiser. Now with guns and FREEDOM!

[Nobby the Bastard]

[dannymassive]

Assuming that you are in the UK, then yes, it is unusual for a CBF600 to run that hot at this cold time of year.

Does the radiator fan kick in at all?

As others have said, sounds like the thermostat, but it could be the fan switch if the fan doesn't kick in.
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Previous Ride's - '01 Aprilia SR125 (Sold) '08 HONDA CBF600n (Sold) '96 CB500 (Sold) '01 FZS 1000 (Sold) '06 CB1300SA (Sold) '07 CB600F Hornet (Sold) - '93 Suzuki Savage LS400 (Sold) '98 Honda VTR1000 Firestorm (Sold) '05 CB600F Hornet (Sold) '01 FZS1000 Fazer (Sold) 2016 Harley Davidson Street Bob SE (Sold) '02 Kawasaki ZX9R (Sold) '98 CB600F Hornet (Sold) '04 Suzuki Bandit 1200s (Sold) '13 Yamaha FZ1-N

[temeluchus]

[Nobby the Bastard]

[RhynoCZ]

Did they bleed the system properly? Air in the coolant would make it more of a insulator rather than a heat transferring liquid. Air could also get in through leaking hoses.

Does the fan work at all though? I know it's not related, but at that temperature, the fan should kick in no matter what. The CB-1 I had would start the fan even when going 30 kph in the 6th gear, in a scorching summer. Not broken, just a feature, said by the owners of their CB-1's.

A faulty temp. gauge in combination with paranoia could also be an option. If the fan works, yet doesn't kick in, the gauge must be faulty.

EDIT: You can take off the cap from the highest point of the cooling system (the rad cap, I guess), start the engine, let it run until it gets hot enough for the thermostat to open the second circuit, let it buble a few minutes, turn it off, let it cool down a bit (just for you not to burn your fingers) and put the cap back on. This should get trapped air from the system.

Check youbook for videos.
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[temeluchus]

[mysterious_rider]

If not could be water pump related.

Fan check. Then thermostat change first. Then bleed system. If persists inspect pump.
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KAWASAKIIIII