Yep and running an engine cooler than what it is designed for is just as hard on it. Too cool of a cylinder with a hot piston will cause the clearance to be to tight.the only thing you do by turning the fan on manually is make the engine run at temperatures that are cooler than ideal.
HK, I don't know why you insist on arguing... HOW do you know whether your fan SHOULD be coming on or not - answer? YOU DON'T... you've never bothered to test your system, yet assume that since some kid's Suzuki 80 fan has come on that your's should too? It just ain't so.I wired a switch into mine but DID not unhook the thermal switch just put a switch between them. My fan has never come on even when i was riding with a group that every bike was on. I am going to be putting an inline gauge and see what it is running. I only turn it on when I am riding slow with my friends and there 5 year old, little Suzuki 80's are not very fast, I never get out of 1st.
And as far as I know there is a thermostat to keep the engine at the right operating temp.
:beer: Sounds great... Does this apply to the 700's?HK, I don't know why you insist on arguing... HOW do you know whether your fan SHOULD be coming on or not - answer? YOU DON'T... you've never bothered to test your system, yet assume that since some kid's Suzuki 80 fan has come on that your's should too? It just ain't so.
I'm not going to get into a deep discussion on thermodynamics or feedback control systems with you vis-a-vis thermostat controlled cooling systems, I don't think you'd get it... BUT the following is truth:
The Raptor has a VERY efficient cooling system. IF your water pump, radiator, radiator cap, head gasket, thermostat, and fan temperature switch are all working properly then the coolant will be held within the ideal operating temperatures that the Yamaha engineers designed the engine to operate under.
You can test ALL of these systems readily by covering the radiator with a sheet of paper and idling the engine - within 10-20 minutes or so, the fan should come on, then go off in a couple of minutes, then cycle every few minutes. This verifies full cooling system operation.
The ONLY rational reason to put a manual switch in the system is if you have a malfunctioning cooling system component and you are either too lazy or unable for some other reason to replace/repair the issue. Else you are forcing the engine to run at an artificially cooler temperature.
You have never ridden with him again because of the oversized oil tank...........:beer: Sounds great... Does this apply to the 700's?
I know I have a friend that has a 660 and his fan NEVER runs... I think it's broke lol. And I have a friend that has a 700 and we can ride side by side and his will be on within 10 mins and be on the rest the day and mine never kicks on. His is 100% stock and mine has some power mods. No cooling mods. I now have an over sized oil tank but have not ridden with him since.