It is my advice to all having the temp go up on their spyder temp gauge, to not blow it off as some silly gauge that is off. It is my experience with the exact problem, that my temp just seemed to go up, not a huge amount, but enough, and more than I remembered it ever being, to the point I had the gauge hitting the red zone, or the hot area, and the fan coming on right on or after the black line at that spot on the gauge. For those unplugging the gauges when this happens and blowing it off as a faulty gauge, please read this. The gauge is not the problem. The temp sensor is not the problem. So long as the fan comes on at the right point, which is right at hot, it's fine, but when the gauge never drops to a safe area, or where it used to be, theres a problem. I tested all the things people suggest, and to my surprise, and experience, although usually a thermostat sticks and the engine overheats and you get steam and problems on a car, the spyder actually is able to keep, just cool enough in many conditions to not do this, or go limp mode on you. It also can have a problem just the opposite, where the engine never gets warm enough. I replaced my thermostat after testing and fully understanding the flow of the spyders coolant, and guess what, it fixed my problem. The fan kicks in at the same temp, but this time, it drops the operating temp back to where I remember it being when I bought the bike and drove it for 2 years. The temp gauge gets stuck either too open, or too closed. The new thermostat had a new number on it, but not sure any actually difference or change in operation.
If you have an overheat problem like this, do yourself a favor, pick up a thermostat, or get it replaced.
If you have an overheat problem like this, do yourself a favor, pick up a thermostat, or get it replaced.