These things you are warning everyone about happening if they don't run a thermostat don't have anything to do with running a thermostat. Corrosion in the cooling system has to do with the PH of the coolant not the temperature, although a higher temp might accelerate corrosion. If it's oil sludge you're warning about then it is likely due to neglect of not changing oil which would be a cause compounded by higher temperature. The thermostat does help the engine warm up faster and meet emission standards easier because it can be ran leaner and hotter, neither of which helps performance or longevity. A thermostat would be a benefit if you were ice racing or operating your bike in extreme cold conditions at high speeds other than that it's another problem waiting to happen and a restriction in extreme heat conditions when you need the coolant flow the most.
Your Assignment read: http://ae-plus.com/milestones/sergi...-to-improve-engine-efficiency-and-reliability Reliability and performance, Care to discuss why that would not be relevant to our engines of today?
You understand that EFI systems are capable of adjusting to different conditions hundreds of times a second and if programmed correctly do not need a thermostat. However I suggest that based on your above 1930s thermostat data and your previous posts you probably need to and should run a thermostat in everything you own for your own piece of mind. I've been a master tech mechanic and machinist (which means I'm ASE certified in every category of mechanics and automotive machining) for over 30 years and professionally built and raced cars or motorcycles during the entire 30+ years of my career and so far no high performance machine car or motorcycle I've ever built or raced has had the need for a thermostat. Others who have raced and pushed their bikes to the limits have also weighed in on this thread and have given some good reasons to delete the thermostat. I prefer not to argue for the sake of arguing, information and experience has been shared in this thread for anyone to make a decision that works for their needs without me weighing in.
Thermostat or not the 'grunge' would still be there in the system. The picture is of the Thermostat cage and the 'grunge' you refer to is just dried coolant - nothing more, nothing less. Put some in a bowl and let it evaporate. You are talking crap when you say 'WATER BOILS AT 100C' because you forgot to add the - AT STANDARD ATMOSPHERIC PRESSURE That is why engine cooling systems are pressurised - to RAISE THE BOILING POINT ! I repeat - The way the Thermostat works in the TR650 is NOT the same as other bikes or engines and it creates Radiator Inefficiency due to the continuous by pass of coolant. There are over 50 Husqvarnas here in Philippines all running no thermostat and all with NO COOLING PROBLEMS - end of story.
