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Author Topic: MPG drop? What could it be?  (Read 3868 times)

htcneil2

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MPG drop? What could it be?
« on: January 31, 2012, 04:26:41 AM »
I have been averaging 45 mpg, but th elast three tanks i have been averaging 38 mpg


I ride an xciting 2009 500ri.

I've been driving like i usually do.

Newer Spark Plugs.

Newer Air Filter.

What else could it be?
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ChandlerScoot

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Re: MPG drop? What could it be?
« Reply #1 on: January 31, 2012, 05:09:40 AM »
I get about that too. I ride mine pretty hard  ;D
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Simon
2009 Kymco Xciting Ri With no mods.

Hoolander2

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Re: MPG drop? What could it be?
« Reply #2 on: January 31, 2012, 06:41:43 AM »
Tire inflation!
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Cortez

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Re: MPG drop? What could it be?
« Reply #3 on: January 31, 2012, 08:06:59 AM »
Quote from: htcneil2 on January 31, 2012, 04:26:41 AM
I have been averaging 45 mpg, but th elast three tanks i have been averaging 38 mpg


I ride an xciting 2009 500ri.

I've been driving like i usually do.

Newer Spark Plugs.

Newer Air Filter.

What else could it be?

Winter?

I've had a huge difference in MPG figures on my carb Agility 125, and the first
tank on my Downtown 300 is in the XC500 teritory, which is all due to the fact
it's OMG cold (10F this morning, and yeah, I ride to work!), and cold engines
are very fuel happy.

Other then that.. tires also tend to drop pressure when it's cold outside.
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axy

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Re: MPG drop? What could it be?
« Reply #4 on: January 31, 2012, 03:53:52 PM »
Quote from: Cortez on January 31, 2012, 08:06:59 AM
Winter?

I've had a huge difference in MPG figures on my carb Agility 125,

3.1 vs. 3.3 l /100 km?

p.s. HAD TO, HAD TO!
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Kymco People GT300i 2017 ABS Euro4
Kymco Agility 125 2008

(Past: Kymco People 250S, Piaggio Beverly 200, Kawasaki ZR-7S, Yamaha TW125, Kymco Cobra Cross 50, Peugeot Zenith 50, Piaggio NRG 50 mc2 72 cc Naraku kit)

Cortez

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Re: MPG drop? What could it be?
« Reply #5 on: January 31, 2012, 07:35:54 PM »
Shaddap!

3.1 to 3.5-3.6, or almost 20%.
 :P
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axy

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Re: MPG drop? What could it be?
« Reply #6 on: January 31, 2012, 10:13:14 PM »
Quote from: Cortez on January 31, 2012, 07:35:54 PM
Shaddap!

3.1 to 3.5-3.6, or almost 20%.
 :P

Wow! Humongous! :) Good that you survived that!
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Kymco People GT300i 2017 ABS Euro4
Kymco Agility 125 2008

(Past: Kymco People 250S, Piaggio Beverly 200, Kawasaki ZR-7S, Yamaha TW125, Kymco Cobra Cross 50, Peugeot Zenith 50, Piaggio NRG 50 mc2 72 cc Naraku kit)

zombie

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Re: MPG drop? What could it be?
« Reply #7 on: January 31, 2012, 10:16:41 PM »
Get um Axy! LOL
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Cortez

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Re: MPG drop? What could it be?
« Reply #8 on: February 01, 2012, 08:50:19 AM »
Quote from: axy on January 31, 2012, 10:13:14 PM
Wow! Humongous! :) Good that you survived that!

I never said it was easy!
 :'(
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htcneil2

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Re: MPG drop? What could it be?
« Reply #9 on: February 01, 2012, 05:28:15 PM »
How would i check the 02 sensor to ensure that is the problem?
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ts1

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Re: MPG drop? What could it be?
« Reply #10 on: February 01, 2012, 07:22:06 PM »
Quote from: htcneil2 on February 01, 2012, 05:28:15 PM
How would i check the 02 sensor to ensure that is the problem?
With a CO emission check. (I.e. during a periodic roadworthy test.)
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zombie

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Re: MPG drop? What could it be?
« Reply #11 on: February 02, 2012, 12:56:01 AM »
You can unplug the O2 sensor to verify it is at least working. Disconnect it while the scoot is running, and it should just about choke out. This dosent verify it is accurate but will tell you it is recognized by the controler
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htcneil2

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Re: MPG drop? What could it be?
« Reply #12 on: February 10, 2012, 07:03:56 PM »
how about sea foam?
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zombie

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Re: MPG drop? What could it be?
« Reply #13 on: February 10, 2012, 11:50:44 PM »
This is a hit or miss scenario. It may clear out carbon deposits if they are present. It may clear out varnish in the fuel supply system if that is present. This sounds more like an o2,injector,cold start circuit problem. The scoot is dumping extra fuel into the cyl. so I believe it is a control issue. Maybe as simple as a throttle position sensor adjustment. More of a TRAINED dealer issue unless you are familiar w/ these systems, and have the equipment to trouble shoot it. The "values" for these parts can be found.
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JustWantToRide

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Re: MPG drop? What could it be?
« Reply #14 on: February 11, 2012, 04:10:43 AM »
Winter mpg is normally lower for several reasons.  Add them up and your drop isn't so dramatic.

1)  Winter blended fuel gets slightly less mpg.
2)  Engines burn more fuel warming up longer.
3)  Tires lose air pressure in cold weather - so check your tires.
4)  Engine oil is slightly thicker in cold weather - which drops your mpg.
5)  Most people don't ride as far - and more short trips means lower mpg...
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2009 Xciting 500Ri
   52mpg so far

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