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The fan comes on when the coolant reaches a set temp. Maybe you haven't got it hot enough. Is it overheating-running bad? You didn't say...
 

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Does the fan function in the same fashion as it does in a car, where it is connected to a sensor telling it to turn on and off? With a car you can disconnect the fan from that sensor and it will go into failover mode and run constantly. Between that and newer thermostats which fail open rather than closed (there was a genius idea), it's saved me on hot days a couple times.
 

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It took quite a bit of idling time before my fan would the temperature got hot enough to kick the fan on on my '00 Thunderbird Sport. I used to have to wait in long lines with it going to work and it would be a good 10-15 mins of idling along before the fan kicked in. The fan will only come on at a preset temperature. It will not be on all the time.



On Triumph classic triples, it is common for the temperature light and the fan to come on at the same time. This is not a problem. The light will go out as soon as the fan brings the coolant temperature down.



If just is not coming on at all, check all the wiring connections. I never had a problem with mine though.



I have a Rocket III now. That fan comes on in no time at all on these hot Texas days

 

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My little Speed 4 runs hot in my opinion. The fan comes on at 220 F to 225 F (105C to 106C).



Do you have a temperature gauge? Just watch that and see at what temperature the fan comes on. I wouldn't get too concerned if the fan doesn't come on until the temperature gets to about 230F.
 

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My Trophy used to come on after I shut the bike off on very hot days or sitting idling on hot days but with full body work you'd expect that



Try running a jumper from the battery to the fan and see if it come's on. Other than that some shops have a thermal imager that can be pointed at the radiator and see where your temperature is. or you can tape or hold a meat thermometer against the radiator and see what it says.
 

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Re: Vulcan mind meld.

..that always works. It worked on those rock creatures, didn't it?

"Pain, I feel pain, and heat...ohhh the heat...I long for ole blighty...."
 

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I have an ST11 that also takes a while for the fan to cut in, as the temperature does not rise very quickly. Just to make sure it still works I leave the bike idle untill the fan cuts in and out a few times. If it does not cut in at all then you can worry about testing the temperature sensor, fan fuse and fan.
 

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If you go under the tank and find the wires for the fan, you can test it by unplugging and crossing them to fool the engine into thinking it has reached a high temperature. It's either that or idle it and blip the throttle until it starts overheating.
 

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Thats a good thing.If the engine was running too hot it would boil the radiator.To test the fan you can find the senser switch in the engine and run a wire between the terminals and the fan should come on.The triumph has a very good cooling system.
 

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Doesn't the Triumph have a temp. gauge? All watercooled machines should have a coolant temp gauge, not an idiot light, or in some cases, nothing at all. With a gauge, you'd just cross reference to the owners manual indicated coolant operating temperature range to confirm your coolant status and be able to anticipate when and if your fan should be running and if your overheating or whatever. Otherwise you've got to go with some of the above recommended solutions to address a concern that may actually have no basis in fact. Or, just trade the machine in for air cooled technology, which NEVER overheats.
 

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TriumphAl,



In additiion to what the others have said, you should be aware that there is a Technical Service Bulletin (or whatever Triumph calls such) on ALL carbureted Triples.



There is a problem with the electrical ground that causes the Overtemp light to come on when the fan comes on (mentioned above.) The fix is to add a ground wire from the radiator mount to the connector block inside the headlight enclosure.



Your Triumph dealer should be able to give you a copy of the one page document. Failing that, PM me and I'll get it from a buddy, scan it and send it to you.

 
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