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Skuttadawg, I don't know what coolent Dan used. But the reason I used the Prestone long life is that if mixes with all brands and is good for all engine types. My Yamaha Majesty is all aluminum but the Linhai Mainstreet is a mix with a cast iron block. You are right about the rpm. At 75 mph the Majesty is near 6,000 rpm.
but both of the bikes turn on the electric fan at just over 180 F which is less than my one of my cars. I bought some Hy-perlube super coolant that I was thinking about using in the sports car because last summer on a long mountain grade I've seen the engine coolent display go over 205 F at times. I have not put it in yet but it says it makes a vehicle run 20 degrees cooler.
Thanks for the info on the Engine Ice. Sounds like it's worth a try for some vehicles.
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