When I first bought my bike the guy had the fan wired so it was constantly on with the key. I unhooked his wires and plugged the temp. sensor back into the radiator so that it would run automatically.

I have never seen the temp of my bike get over about 185-190 degrees while riding until yesterday. It was very hot and a buddy of mine wanted to learn how to ride. Took him to an empty lot and let him putt around for a while, well, that slow speed riding brought the temp up and the gauge was reading 225. Fan had not kicked on but there was coolant puking out of the overflow line. Turned it off, let it cool down and I rode it back home, once I started riding, temp went back down to 170-180 like normal. Any idea why the coolant was overflowing at that temp, it was hot but not THAT hot, I have seen many posts with guys saying temps reading in the 230-240 range at lights and slow speeds.

 

it shouldnt be puking out regardless of the temp, it should drain into your overflow can...

if your overflow can was full, and it was coming out of your overflow...

however, ide go and drain your coolant, and refill it with the specified amount, it sounds like you may have to much coolant in your radiator/overflow..

it sounds like your temp gauge is bad... which didnt allow the fan to kick on..

replace the engine temp sensor...

or rewire it to turn on with a switch

 

Thanks Z. I will drain out all of the coolant and start fresh. It was a little low when I got it so I added coolant but never flushed it.

Also, I will look into the temp sensor as I'd like for it to work automatically.

Thanks again!

 

Check the fan fuse. When I first bought my bike the fan didnt work and in traffic the bike would get into the 230-240 range. Hopefully its only a blown fuse

 

My fan doesn't come on till 229, so it hardly ever comes on unless i'm sitting in traffic.

 

Well either way, if shouldn't have been pouring out radiator fluid from the overflow line at 220 degrees...so maybe it was just overfilled?

 

Your fan switch is broken FYI.

Op- The fan should come on at 220. I recommend draining and replacing the coolant to the proper level and making sure the fan comes on correctly then see how it does. If it still pukes after everything is good then you have another problem like the radiator or water pump.

 

Came on at 226 the other day so I doubt it's broken I rarly get to 220, it doesn't get
all that hot where I live.