Honda went from one fan attached to one radiator on the SP1, to a fan for each radiator on the SP2 for additional cooling.
As for myself, the previous owner had a puncture in the left radiator tank and rigged it using JB Weld, which didn't hold, much to my displeasure.
Also, one fan was developing squeaky bearings, so it made my list also.
Once I had the hole heliarc'd and pressure tested, I replaced both of my fan motors and inspected the whole system, made sure everything was nice and tight, then filled with coolant (Engine Ice pre-mix in my case).
Now I don't have all these mega high temps folks talk about.
In stop and go traffic, it will climb to 221 at most, but the fans cool it down to 205 in a few minutes. Once moving in town, it generally stays around 205 to 207.
But if moving at a decent pace it cools down to 187 no matter how fast I go.
When the fans run, they pull air from the outside in. When moving, the air moves from the inside out. That's why some reverse the fan motor connectors.
Also if the bike is old, the thermostat could be getting old and not working properly. Also the radiator cap may not be maintaining pressure.
Mine is an '02, so it's 7 years old. Things wear out, break, and need maintenance.
Such is life. But I like working on it. It's therapy to me.
Last edited by SubSailor; 07-14-2009 at 05:49 PM.