Is it me or the gas gauge? - Triumph Forum: Triumph Rat Motorcycle Forums
Club Cafe' Cafe Racers; the Thruxton, Bobber and other custom cafe styled bikes.

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post #1 of 10 (permalink) Old 05-17-2017, 01:40 PM Thread Starter
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Is it me or the gas gauge?

So far about one hundred miles on recently acquired ThruxR but I'm scratching my head over the gas gauge. On the day I rode it home it showed no gas but as I rode the gauge crept up to about half way and showed 95 miles to empty. Took bike out for ride the next day still showed 95 but I knew the tank had been filled by the dealer. As I put a few more miles on the tank gradually went up to full and showed 147 miles to empty. This morning it showed 147 with the gauge showing full so I decided to fill it to see what was going on. Filled tank to bottom of filler and rode off. Now after 5-10 miles it shows half full and 97 miles to empty! Is the sending unit goofy or am I doing something wrong? The recall was done shortly before I picked up the bike and I have read the other posts on the gas gauge just wondering if there was anything else I should know.

Last edited by motomi1; 05-17-2017 at 01:46 PM.
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post #2 of 10 (permalink) Old 05-17-2017, 02:16 PM
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That is not how my R is odd. My R, which I think is similar to others, takes a while to register when fuel has been added so the gauge reads empty for about 2 or 3 miles until it adjusts. The other thing that is a little odd is that the range adjusts depending on your driving style and it adjust quite a lot. So I live in London and it will show about 110 miles when full if I am riding locally but if I take a ride out of the city and specifically on to motorways where I cruise at a steady 70 the range will go up massively. So I can start a journey with a range of 60 miles and drive for 20 miles and it will show a range of 100 miles.

Your bike though appears to have trouble adjusting to the correct fuel level which is slightly different. My wife's Vespa, I know, a slight tangent, had a similar problem and I only cured it by replacing the sender unit so I would suggest a chat with the dealer you bought it from.
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post #3 of 10 (permalink) Old 05-17-2017, 02:25 PM
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It may be defective.
The gauge on my Thruxton adjusts quickly after a fill and generally reads 200+ remaining.
It does recalculate based on my riding style
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post #4 of 10 (permalink) Old 05-17-2017, 05:27 PM Thread Starter
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I have noticed the change as it went from 95 miles 3/4 tank showing to 155 miles full tank showing but I then filled the tank and it took 2.1 US gallons. I think will ride it for a few more days since (knock wood) that appears the only glitch and now with 522 miles on the clock its time to be a little more throttle aggressive.
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post #5 of 10 (permalink) Old 05-17-2017, 05:29 PM Thread Starter
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I did already call the dealer and expressed my belief that it might be the sending unit but i'm going to give it a couple of days since it apparently had been sitting for some time prior to my purchase.
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post #6 of 10 (permalink) Old 05-22-2017, 01:08 PM
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I noticed when i filled up my Thruxton R's tank that it takes a minute for the bar graph to read full right after filling up. I have noticed the delay as well.

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post #7 of 10 (permalink) Old 05-22-2017, 04:08 PM
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Quote:
Originally Posted by stangken View Post
I noticed when i filled up my Thruxton R's tank that it takes a minute for the bar graph to read full right after filling up. I have noticed the delay as well.
That is normal.
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post #8 of 10 (permalink) Old 05-25-2017, 12:12 PM
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Damn, whenever I fill up I get 93 miles to empty every time...
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post #9 of 10 (permalink) Old 05-25-2017, 01:18 PM
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It could be worse, my old ducati didn't even have a fuel gauge. at least my R will give me a good idea of when I need to stop.
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post #10 of 10 (permalink) Old 05-25-2017, 03:53 PM
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My gauge seems off too. I'll get the light at 50 miles then take it down to 10-20 before I fill up. But when i do I never fill up more than 2-2.5 gallons. So there's 1.7-1.2 hiding in there somewhere

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