Blaz1 said:Okay so here's my story my 250 ran down the antifreeze so I put in water I don't know if that is alright but anyways the engine has been a lot hotter. Should I put in antifreeze?
rmc_olderthandirt said:The primary purpose of antifreeze is to lower the temperature at which the coolant will freeze, which is a very important thing if you are in an area that gets cold.
Some of the coolants will also increase the temperature at which the mix will boil.
Extending the range at which the coolant remains a liquid will not necessarily change the rate at which it will remove heat from your engine. It is possible that a specific brand of coolant will do that, but I have not been able to get any specific information on that from any of the major brands of Antifreeze. Note that it is also possible that they actually are worse than just plain water in their "thermal resistance".
If your bike is suddenly running hotter than I expect you have a problem. A good antifreeze might keep you from boiling over but it isn't likely going to cool the engine any better.
Rod