Re: Radiator fan cut-in temperature
Thanks r6ben00. It's good to know that it can be done.
I've been thinking about it more, and figure there was a reason why the Yamaha engineers set 101C as the cut-on point, and not say 90C. My current hypothesis is this: Those radiator fans are formidable... each one is on its own 15A circuit. Assuming a nominal fuse rating of 135%, that would make it about 10A or so current draw per fan, for a total of 20A when they are running. When stopped and idling, you already have the draw of the headlamp and the fuel injectors, and now an additional 20A with the fans on. Could be the extra load would unduly tax the battery/alternator/charging system at idle. With a bigger battery as in an auto, that might be fine, but for the bike, there is the issue of weight/size. So I figure they may have bumped the fan cut-on point up for a trade-off between optimal engine temperature and load on the electrical system.