Fuel consumption increased. What should I do? - KTM Duke 390 Forum
 
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post #1 of 7 Old 10-21-2019, 10:26 AM Thread Starter
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Fuel consumption increased. What should I do?

Hello,

My motor is at 17,000km. I did 15,000km maintenance. oil, oil filter, air filter, Spark plug changed. But fuel consumption did not fall.

It consumes 5.2lt of gasoline in calm use.

I'm so upset, what should I do?
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post #2 of 7 Old 10-21-2019, 09:44 PM
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My bike uses also about 5l/100km riding in heavy city traffic - not aggressive riding.
When I do a trip outside of the city the consumptions is <4l/100km.
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post #3 of 7 Old 10-22-2019, 02:37 AM
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Have you checked all variables that might create friction during your rides? Here in Asia, almost all riders keep their foot on the brake at all times which won't help. Brake pads dragging, chain old or too tight, too wide tire size etc. Then again I think the usage is mentioned at 4.7 Ltr/hour? Maybe you should let us know your average over a year/month different rides etc.


Quote:
Originally Posted by blue_man92 View Post
Hello,

My motor is at 17,000km. I did 15,000km maintenance. oil, oil filter, air filter, Spark plug changed. But fuel consumption did not fall.

It consumes 5.2lt of gasoline in calm use.

I'm so upset, what should I do?

As long as you are happy with what you ride.
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Last edited by KTMasean; 10-22-2019 at 02:41 AM.
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post #4 of 7 Old 10-22-2019, 05:38 AM Thread Starter
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Quote:
Originally Posted by KTMasean View Post
Have you checked all variables that might create friction during your rides? Here in Asia, almost all riders keep their foot on the brake at all times which won't help. Brake pads dragging, chain old or too tight, too wide tire size etc. Then again I think the usage is mentioned at 4.7 Ltr/hour? Maybe you should let us know your average over a year/month different rides etc.
The motor had fuel consumption of up to 15,000km, out of town 3.4lt and inner city 3.8-4.0lt.

Whatever happened, the engine started to burn too much after 15,000km. Although I do maintenance at 3,000km. I'm not a very aggressive engine driver, I always drive my bike for 6,000-8,000 rpm.

I checked the brake pads. 70% available. I always check the tires. 29-30 bars.
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post #5 of 7 Old 10-22-2019, 04:08 PM
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I wonder about wheel bearings? Also front brake drag.

This isnít my first rodeo, but it is the first one with real clowns...
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post #6 of 7 Old 10-23-2019, 12:33 PM Thread Starter
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Originally Posted by Whyzee View Post
I wonder about wheel bearings? Also front brake drag.
I didn't see any problems with the bearings, but when I squeezed the front brake and I'm going to stop, it makes a noise.
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post #7 of 7 Old 10-30-2019, 01:16 PM
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Assuming that the mpg is really elevated, check if the problem occurred after the big service. If so ask them if they had to adjust valve - cam clearance. If the did it and there is no rolling drag (constantly braking or wheel bearings) then get the bike back and tell em to adjust the clearence properly.

If you raise the bike on a stand you can easily check if there is any drag from wheels.

You should also check for ecu error codes because more mpg can can come as a reason to failling coolant temp sensor, IAT sensor, or lambda sensor.

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Last edited by duke200; 10-30-2019 at 01:26 PM.
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