Join Date: May 2015
Location: Marietta, GA
Year/Make/Model: 2010 Kawasaki Voyager
As the others said, check the thermostat/fan to make sure they are opening/coming on.
Make sure the radiator cap is holding pressure and that the hoses have not gotten soft. The system has to maintain a certain pressure to achieve optimal cooling.
Also, if it is a 2012 and the previous owner did not even bother with the air filter, it is a virtual certainty that the coolant has never been changed. I would recommend a flush and coolant change. It might also be wise to change the hoses and o-rings and maybe the radiator cap if they have never been changed and it has been running hot so much. I use Royal Purple Purple Cooling System Flush (I do not recommend using vinegar) and a good OAT coolant. I use O'Reilly's 50/50 Universal Coolant (not the DexCool one). I also add Purple Ice. I'm not sure it helps, but it won't hurt.
Sounds like you don't have an FI controller or Ivan's flash of the ECU. Ivan's is the most popular recommendation now. It will add gas which will cool down the beast a bit, too. I got a Dobeck EJK before I heard of Ivan's flash and I am happy with it, but would probably do the flash instead if I did not already have the EJK.
RAM mount for TomTom Rider 400 (with anti theft module)
6000k LED Headlight & Spots; Kisan Headlight Modulator (works with LEDs),
__Brake Light Modulator, LED License Plate Holder
Dobeck EJK 3.0
Lucky Mirror Extenders
Misc. RAM Mounts for Cup Holder, SPOT, Phone, etc.
Chuckster BAK, Trailer Hitch and Cooler Rack
Wiring for Trailer
Ray's Throttle Mod
Things to do:
Drilling Baffle Plates (Maybe)
Paint HF Tag Along Trailer to Match Bike