Thanks - I have the service manual.
This would explain why the when the fan comes on it has to work harder/longer than expected to bring it back down to "normal" operating temp.
This lines up with exactly what my gut tells me.
I posted in the other thread but have extensive experience on cooling systems, been working on water cooled everything all my life. Post 52 is the start of my initial switch over after selling my 07 which I had also installed the T Bob, the difference is a thing called stratification occurs on the return side of the rad which is the standard mounting location, I wanted it on the discharge side which doesn't suffer from the same stratification effects as the return side. http://www.kawasakiversys.com/forums...ight=thermobob
So I had drained my system at least 8 times, the final one was when I installed a prototype #4 designed for snow bikes.
So two factors in cooling, the fan comes on around 214'F and turns off around 210'F , if there is a flow restriction this should be easy to find, as I have run my 2015 650ABS at 4000 RPM at a standstill, watching the engine temp come up, the instant the fan comes on, the temperature stabilizes and after about 30 seconds it starts dropping , cycle time at 4000 RPM is approximately 2.5 minutes , fan on time fan off time, that is it takes about 2.5 minutes at 4000 RPM to gain enough engine heat to raise it 4'F, roughly the same to dissipate it, with reduced flow, expect the engine temperature to continue to climb beyond 214'F even with the fan running. SAecond thing that plays a huge bearing in the fan cycle is your idle RPM and idle voltage VDC , a change of 1 volt reduces the speed by roughly 20% , a fan is one of those things that double the speed = Hp squared . So if you have a bad battery and your idle is low, you may be down around 13 to 13.6 VDC, at that voltage it would take approx. 4 minutes for the same above cycle.I have enough temperature meters and probes that I can measure both discharge and engine temperature simultaneously. Please check your idle VDC after engine and oil at full temp
., if you are running standard headlights , turn on high beam, this is almost
the equivalent of the fan amps. Post your readings in this thread.
This is a capillary read out of my bypass line for the T Bob. This was taken when I was cycling the T stat and getting the air out of the system, as my bypass is almost the highest part of the glycol system. This shot was taken with the fan starting to cool the system