I want my MPG - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 7 (permalink) Old 11-21-2012, 04:56 PM Thread Starter
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I want my MPG

I have a 1998 adventurer. I love this bike, but she is giving me a hard time. I have only been getting 40 miles before I have to flip to reserve. I think she may be leaking. Are the float needles sticking? Am I running rich, or do this bike just drink like muscle cars?
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post #2 of 7 (permalink) Old 11-21-2012, 05:16 PM
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You should be getting around 125 miles before reserve. Was the bike sitting a long time before you got it?

I'd drain and clean the tank. Also remove and inspect the petcock. May be clogged.

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post #3 of 7 (permalink) Old 11-21-2012, 05:24 PM
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hi advhopeful somthing is way wrong here 40 mls from full tank to reserve you should be getting more like 40-45 mpg by sound of your getting arnd half this you should get arnd 110-120 mls b4 reserve depends how you ride it mind but even thrashing it would not do this low mpg ,now without having more details i can only assume that bike is using just over 2 gallons of fuel for 40 mls ?if its less than that i be looking at petock ,(fuel switch) it could be blocked with gunk easy way to find out is look inside tank with torch (flashlight for our american cousins) you should be able to see if the tank is rusted up has the bike been layed up for a long time ?then it could be leaking carbs as in floats ?but we prob have a btr idea in how to help if you give us some more details about how bike runs how the plugs look as in colour thanks
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post #4 of 7 (permalink) Old 11-21-2012, 10:14 PM
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At the mileage you're describing, you should have an outright noticeable fuel leak. If you leave the gas tap on and the bike on its sidestand, do you get a puddle on the floor?

Normal mileage is 40-55mpg (US). In my experience, if you run these bikes non-stop at 90-100mph, they'll still return about 33mpg (roughly 100 miles before you hit reserve).

Last edited by petermholmes; 11-21-2012 at 10:28 PM.
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post #5 of 7 (permalink) Old 11-21-2012, 10:35 PM
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If you fill the tank, run it to reserve then refill, how much does it take to refill?

At 20 mpg you should be billowing black smoke or leaving a trail of liquid on the ground.

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post #6 of 7 (permalink) Old 11-30-2012, 08:19 PM
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I get over 50mpg with my '99 Adventurer. Time to tear into the carbs and rebuild them, seems like. Does your oil level increase without your putting any more oil in it? Maybe gas is flowing into the crankcase...
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post #7 of 7 (permalink) Old 12-10-2012, 01:37 PM
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im in the 37mpg-42mpg range on my '95 s3. Time for a carb rebuild would be my guess.
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