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Thanks for the video on radiator cap; I never thought its functionality was that complex. This is good to know. I may just buy a new one if its the actual problem but the radiator cap seemed fine. I unscrewed the screw that kept the cap in place and twisted it off. It seemed there was a tight...

Fan does kick on and seems to be working fine when sitting on one spot without moving, but it's insufficient to cool down the engine in hot weather.

The coolant liquid is at the same level all the time. I hope it's a broken thermostat that's always in the closed position instead of something more sinister like changing out entire water pump or radiator (yesterday a Yamaha dealership hypothetically quoted me $600 for radiator alone IF it...

The fan spins freely once the bike reaches the high threshold temperature. Even then, the radiator hoses both outflow and inflow are limp. Just nothing going through them. This is like having a heated kettle strapped on the front of the bike: the water boils after a while but as long as you're...

I recently bought a used bike - 2004 Yamaha FZ6s; 11,000 miles, starts every time and mechanically sound except it tends to overheat and after changing out old, nasty, brown coolant I poured in new green stuff. I notice the old coolant, as well as the new coolant is not circulating within the...