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post #1 of 14 (permalink) Old 05-07-2019, 10:02 AM Thread Starter
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Main Motorcycle: 2000 Thunderbird Sport
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New to me 2000 Thunderbird Sport

I have had the bike about 2 weeks now, runs great. I saw the temp light flicker on at the end of my ride last night, i checked the coolant res and it was empty. Since I only saw the light flicker for a moment, does that mean the temp did not get too high to do critical damage? I will be popping the tank off tonight to get a better inspection.
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post #2 of 14 (permalink) Old 05-07-2019, 10:10 AM
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You're probably fine. What you don't want is to be running it with the light on for long periods.

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post #3 of 14 (permalink) Old 05-07-2019, 12:06 PM
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Was the fan running when the light was flickering? If not, has the fan ever come on? First thing you need to do is confirm the fan works, otherwise further troubleshooting could be dangerous.

There are several reasons why the light might flicker. First thing you have to do is top off the pressurized part of the system. To do this the tank has to come off. It has to be filled to the point where there is no air in the system. Put the cap on and run the engine (get a long fuel line and put the tank on a table or something.) Open the bleeder on the thermostat housing when the coolant starts to flow through the system, as evidenced by hot hoses to and from the radiator. Once the air is all out, add coolant to the mark on the recovery bottle. Normal expansion and contraction of the coolant will cause the level in the bottle to rise and fall, but when it is cold it should always return to the same level. If it doesn't then you'll need to figure out why.

Once you get the level dealt with, if the light continues to flicker, there are other things to look at, but the level must come first.

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Last edited by WSC; 05-07-2019 at 12:12 PM.
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post #4 of 14 (permalink) Old 05-07-2019, 06:48 PM
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Congratulations, you’re officially the owner of one of the coolest bikes made.
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post #5 of 14 (permalink) Old 05-07-2019, 08:14 PM
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If after checking the basics (coolant level, fan operating ok, etc), this could be the grounding issue that causes the temp light to flicker. I've attached the information on this issue. I had to do this to my 2001 TB. Otherwise...great choice in bikes! You obviously have great taste.
Attached Files
File Type: pdf Triumph Flickering Coolant Light.pdf (182.4 KB, 21 views)

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post #6 of 14 (permalink) Old 05-07-2019, 09:41 PM
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I'll just add to all that's been said that you might as well do a full coolant replacement/flush anyhow. It's important and supposed to be done every 2 years and I think it's a safe bet it may not have been. In so doing, if you follow the steps in the manual or the Haynes book or that can be found here, you'll get a lot of peace of mind. BTW, I doubt you hurt the bike at all...yourself.
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post #7 of 14 (permalink) Old 05-07-2019, 11:07 PM
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Do all the checks to make sure everything in the cooling system is in perfect working condition. I have performed the ground fix for the temp light and mine will still flicker right at the moment the fan comes on.

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post #8 of 14 (permalink) Old 05-08-2019, 08:14 AM Thread Starter
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Thanks all for the input!!! I pulled the tank and checked the fluid levels. Turns out they only looked out because they were at the tip top of the holding tank so I could not see any line to measure by. That being said, I will most likely flush the system soon. My friends had dubbed the bike the "CreamCycle" just wait til my brown seat comes in.......
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post #9 of 14 (permalink) Old 05-08-2019, 08:41 AM Thread Starter
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New question.... The fuel filler overflow tube was just dangling there, should it be connected to what appears to be a line coming from the carbs??

Last edited by Simian5; 05-08-2019 at 08:44 AM.
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post #10 of 14 (permalink) Old 05-08-2019, 04:42 PM
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Not sure if I talk about the same thing as you, but if you mean hose/tube in rear part of fuel tank, just few inch behind fuel tap, it is fuel tank overflow. Roll over valve have to be installed here.
Part number 20.

Last edited by MarfiK; 05-08-2019 at 04:56 PM.
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