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  #1  
Old 10th October 2018, 09:20 AM
Dub Duke's Avatar
Dub Duke Dub Duke is online now
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Biker.ie Member No. 20467 from North County Dublin
4,124 posts since Feb 2010
Motorbike: NSR 250s, R6 13s
Modifications: Loud can
Default Fuel consumption up post service

I serviced the R6 - air filter (piper cross - previous std), new plugs, oil, oil filter + chain and sprockets.

Bike sounds a bit raspier with the piper air filter, is smoother - probably plugs mainly and is going well.

I've noticed that the fuel consumption is down circa 10% - thought maybe the heavier traffic heading into town post summer, but measured on weekends too.

Would the new air filter take in more air, meaning more fuel??

Maybe needs a remap? Any relevant (and/or funny) thoughts?
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  #2  
Old 10th October 2018, 09:21 AM
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Biker.ie Member No. 20467 from North County Dublin
4,124 posts since Feb 2010
Motorbike: NSR 250s, R6 13s
Modifications: Loud can
Default Re: Fuel consumption up post service

Micron exhaust also on the bike - but was before the service too.
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  #3  
Old 10th October 2018, 10:05 AM
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Biker.ie Member No. 31828 from Athlone (ex-Dub)
3,924 posts since Jul 2013
Motorbike: CRF250RLA
Default Re: Fuel consumption up post service

Originally Posted by Dub Duke
Would the new air filter take in more air, meaning more fuel??
Not a mechanic, but to me I can see the logic in this - if more air gets in through the new clean filter, then the air sensor / ecu would see that, and send a matching larger amount of fuel.

I'm sure the resident spanner-spinners will be along to call this twaddle!!
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  #4  
Old 10th October 2018, 10:52 AM
Interceptor
Default Re: Fuel consumption up post service

Is the gearing the same? Did you fit exactly the same sprocket when you changed them?
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  #5  
Old 10th October 2018, 11:40 AM
Dub Duke's Avatar
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Biker.ie Member No. 20467 from North County Dublin
4,124 posts since Feb 2010
Motorbike: NSR 250s, R6 13s
Modifications: Loud can
Default Re: Fuel consumption up post service

Originally Posted by Interceptor
Is the gearing the same? Did you fit exactly the same sprocket when you changed them?
Good question - yes - exact same sprockets front and back, same gearing.
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  #6  
Old 10th October 2018, 11:50 AM
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Biker.ie Member No. 30720 from Offaly
2,148 posts since Jan 2013
Motorbike: R1, zx7/9r, Uni-cycle
Modifications: inflatable doll underseat
Default Re: Fuel consumption up post service

either way a remap is always worth a shot on a bike with modified air filter and exhaust, more ponies and better efficiency......
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  #7  
Old 10th October 2018, 12:17 PM
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Biker.ie Member No. 20467 from North County Dublin
4,124 posts since Feb 2010
Motorbike: NSR 250s, R6 13s
Modifications: Loud can
Default Re: Fuel consumption up post service

Originally Posted by sharpbikes
either way a remap is always worth a shot on a bike with modified air filter and exhaust, more ponies and better efficiency......
Agreed. I want to ensure there isn't an issue with the bike before the remap is all.
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  #8  
Old 10th October 2018, 12:23 PM
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Motorbike: R1, zx7/9r, Uni-cycle
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Default Re: Fuel consumption up post service

Originally Posted by Dub Duke
Agreed. I want to ensure there isn't an issue with the bike before the remap is all.
any error on dash?
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  #9  
Old 10th October 2018, 01:15 PM
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Biker.ie Member No. 20467 from North County Dublin
4,124 posts since Feb 2010
Motorbike: NSR 250s, R6 13s
Modifications: Loud can
Default Re: Fuel consumption up post service

Originally Posted by sharpbikes
any error on dash?
No error and is running well bar the extra thirst. Getting something like 20 kms less to a tank on average.
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  #10  
Old 10th October 2018, 01:25 PM
damienga15de damienga15de is offline
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Biker.ie Member No. 26158 from Midlands
88 posts since May 2011
Motorbike: 1991 GSXR 750 M
Modifications: Sebring exhaust
Default Re: Fuel consumption up post service

new air filter, more air getting in more fuel being used.
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  #11  
Old 10th October 2018, 01:27 PM
damienga15de damienga15de is offline
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Biker.ie Member No. 26158 from Midlands
88 posts since May 2011
Motorbike: 1991 GSXR 750 M
Modifications: Sebring exhaust
Default Re: Fuel consumption up post service

And you have gone from standard to a high flow
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  #12  
Old 10th October 2018, 02:18 PM
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Biker.ie Member No. 30720 from Offaly
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Motorbike: R1, zx7/9r, Uni-cycle
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Default Re: Fuel consumption up post service

Originally Posted by damienga15de
new air filter, more air getting in more fuel being used.
not necessarily, if its closed loop injection it will give the same fueling as always with more air meaning lean mixture. if it has an 02 sensor or airflow sensor and can self adjust the fueling then yes it would be due to the air filter
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  #13  
Old 10th October 2018, 02:32 PM
Weevil 2.0 Weevil 2.0 is offline
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Biker.ie Member No. 31868
158 posts since Jul 2013
Motorbike: MT-07
Default Re: Fuel consumption up post service

Fuel can have winter additives in it. my consumption always increases in the winter and I know that additives changed depending on seasons.
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  #14  
Old 10th October 2018, 07:11 PM
10bob 10bob is offline
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Biker.ie Member No. 38599 from Waterford
3 posts since Oct 2018
Motorbike: ZX10r
Modifications: PcV
Default Re: Fuel consumption up post service

Maybe you’re giving it more throttle?😁
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  #15  
Old 10th October 2018, 08:14 PM
Valiant Thor
Default Re: Fuel consumption up post service

Originally Posted by Weevil 2.0
Fuel can have winter additives in it. my consumption always increases in the winter and I know that additives changed depending on seasons.
never knew that I just thought it was the increasing petrol price as we buy it in coin not volume ie, 10e, 5e etc and the higher price means less fuel
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  #16  
Old 11th October 2018, 07:29 PM
Dub Duke's Avatar
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Biker.ie Member No. 20467 from North County Dublin
4,124 posts since Feb 2010
Motorbike: NSR 250s, R6 13s
Modifications: Loud can
Default Re: Fuel consumption up post service

Originally Posted by Weevil 2.0
Fuel can have winter additives in it. my consumption always increases in the winter and I know that additives changed depending on seasons.
Very interesting. Anyone else notice this?
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  #17  
Old 12th October 2018, 11:10 AM
Weevil 2.0 Weevil 2.0 is offline
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158 posts since Jul 2013
Motorbike: MT-07
Default Re: Fuel consumption up post service

From this article
We are talking about diesel but what about gasoline?
For gasoline fuel, the impact of consumption is the same, but the reason is different and based on safety. In order to avoid explosion risks due to evaporation of the lighter molecules in the gasoline (example: during refilling tanks), the EN228 standard impose to limit the “vapor pressure” propriety. This proprietary determines the facility by which lighter components can evaporate (and potentially cause an explosion). This is why it is strictly forbidden to smoke in gas stations!

The petroleum refiner have to create a less volatile fuel, so in fact heavier, in order to reduce the chances of evaporation.
In winter, as it is colder, the standard is less strict so the producers can add more lighter molecules.

As a conclusion, diesel composition changes in winter in order for cars to start even under cold temperatures, and gasoline composition changes because of security reasons. But the result is the same: A car will need more fuel in winter.
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