What's the temp outside?? generally about 1/3 the way up is normal in moderate temps, above 85 or 90 up to 1/2 is normal, at 2/3 to 3/4 it's running a little too hot in 75 or less temps. It's all relative
Lots of choices for why, low water, plugged galleys, bad pump, bad switch, bad thermo, bad fan or fan switch??
#1. Good purchase.
#2. This forum is the best of it's kind. These guys are awesome and truly knowledgeable.
#3. My bike just started the same thing and I'm in the middle of reading up. If you run a search on overheating there are gobs of posts on it. But there's almost too much information to go through easily. Start with the basics first. Do you have enough coolant in the radiator and overflow reservoir? Is your radiator cap holding pressure? (Is the cap's rubber seal around the collar operational?) After getting the bike warm does it run higher temperatures while riding over 35-mph? Does it cool of while moving and overheat while sitting still? Answering these questions can then lead you to the next set of well known maintenance issues. Like the thermostat could be stuck, and needs replaced or the radiator could be clogged. Fan switch associated with the bike overheating while sitting still at idle. Less likely but still are issues on these bikes could be cross flow tubes o-rings are leaking, the water pump impeller broken or worst case, blown head gasket.