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dibdob69
Brick Rider
Joined: 14 Sep 2011
Posts: 42
Location: Near Warwick in the UK
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 Posted: Wed Nov 02, 2011 3:57 am Post subject: Help Low MPG |
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How can i improve my MPG ?
At the moment I'm only getting 130/150 miles to a tank of gas, any ideas how i can improve on that, What can cause low MPG ?
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BMW K1100LT 93
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SugarHillCTD
Site Admin
Joined: 10 Oct 2007
Posts: 4238
Location: Now in Eastern Pennsylvania
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| Posted: Wed Nov 02, 2011 5:59 am Post subject: |
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Have you looked at BMWMick's diagnostic code thread?
http://k11og.org/forum/viewtopic.php?t=2110
My first thought is that the Motronic brain is in a default "protective" mode.
Or you have a very heavy right hand  . Just kidding.
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'92 K100RS4V Pearl White SOLD
'04 K1200GT
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E T
Flying Brick Rider
Joined: 21 Jan 2010
Posts: 265
Location: Colbert Wa
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| Posted: Wed Nov 02, 2011 1:59 pm Post subject: |
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Sugar hill, Theres some truth to that heavy hand  , One ride i was coming back from northern Calif seeing my son, From one fuel up to the next was 152 miles, I was sweating it as my gauge had been on empty for a a bit longer than i liked and the lowest i had ever let it get. But i was also doing 100 to 130 the whole way..
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Sonu
Flying Brick Rider
Joined: 15 Jan 2004
Posts: 400
Location: San Jose, CA
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| Posted: Wed Nov 02, 2011 2:40 pm Post subject: |
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Are you sure that your problem is low mpg and not low fuel fillup? How many gallons are you getting into the tank at fillup? Have you searched this site for a "flapperectomy"?
I get anywhere from 160 to 200 miles per tank depending on how hard I'm riding the bike.
Sanjiv
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1997 K1100LT "Ziggy" _GarminGPS_Corbin saddle_K Guards _Hyperlights_Fog lights_Eastern Beaver Relays_Cee Bailey_4"speakers_Michelin PR4's_MoS2_Spiegler lines_TPMS_VDO
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BobZ(IL)
Rider in the Sky
Joined: 20 May 2007
Posts: 651
Location: Bourbonnais, IL
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| Posted: Wed Nov 02, 2011 8:28 pm Post subject: |
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If you do much highway riding, lowering your windscreen can improve mileage.
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'93 K1100LT
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E T
Flying Brick Rider
Joined: 21 Jan 2010
Posts: 265
Location: Colbert Wa
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| Posted: Thu Nov 03, 2011 1:26 am Post subject: |
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| Sonu wrote: | Are you sure that your problem is low mpg and not low fuel fillup? How many gallons are you getting into the tank at fillup? Have you searched this site for a "flapperectomy"?
I get anywhere from 160 to 200 miles per tank depending on how hard I'm riding the bike.
Sanjiv |
Sonu, I am the same as you, 160 to 200+, I have done the Flapperectomy on my bike,
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2005 Honda VTX 1300c---Passed |
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Number 6
Flying Brick Rider
Joined: 05 Feb 2011
Posts: 481
Location: Paris area, France
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| Posted: Thu Nov 03, 2011 4:03 am Post subject: |
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Try throttle sync + CO (richness) tune.
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whyoldbill
Flying Brick Rider
Joined: 12 Jun 2006
Posts: 440
Location: in the boonies, northwest of Columbus, Ohio
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| Posted: Thu Nov 03, 2011 12:45 pm Post subject: Help Low MPG |
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In addition to all of the above suggestions (except the CO richness tune, we can't do that in the US as we have O2 sensors)
I'd recommend going for about a 3-5 mile ride in a flat area, where you can coast to a stop. Then check your brake rotors, If they're really hot, you're likely dragging a brake and it's time for a master and/or slave cylinder rebuild.
I ride 80 miles round trip to work daily and go about 240 per tank after the flapper-ectomy (at 70-75 mph, not 100!!)
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dibdob69
Brick Rider
Joined: 14 Sep 2011
Posts: 42
Location: Near Warwick in the UK
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| Posted: Fri Nov 25, 2011 7:25 am Post subject: |
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I ran the bike just about dry and this is what i found, The fuel light came on at 129 miles the bike started missing on acceleration at 160 miles and was about empty at 180 miles.
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BMW K1100LT 93
BMW 1150 GSA O3
KTM 690R 09 |
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BMGraeme
Flying Brick Rider
Joined: 14 Mar 2006
Posts: 373
Location: Marlborough, United Kingdom
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| Posted: Fri Nov 25, 2011 2:07 pm Post subject: |
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I fill up usually when the trip reads 180 miles. I have a fair amout of fuel left and the light still has not come on. I'm quite heavy handed with the throttle so your MPG is really bad. Lots of advice as to what to look at on here, but somethings wrong that's for sure.
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Jim
Site Admin
Joined: 17 May 2003
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Location: WHERETHEFUNNEVERENDS
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| Posted: Fri Nov 25, 2011 4:15 pm Post subject: |
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I've run out of gas twice - once at 239 miles and the other time at 240. Both times I was pulling the trailer, and traveling at highway speeds.
Have you done a flapperectomy yet? That will let you put a little more gas in the tank.
180 is low miles for a tankful.
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Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000
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Tim (Midland Section)
Flying Brick Rider
Joined: 08 Apr 2005
Posts: 960
Location: Pinxton, Nottingham, England.
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| Posted: Sat Nov 26, 2011 8:39 pm Post subject: |
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| Jim wrote: | Have you done a flapperectomy yet? That will let you put a little more gas in the tank.
180 is low miles for a tankful. |
UK Bike do not have a "flapper". One can however get more fuel in with a wiggle of the bum or two (butt) when the tank appears brimmed to release the air.
I usually get 170 /180 heavy handed & have had 220 before the fuel light illuminates. K's get thirsty if you exceed 5000 revs.
It does sound like a throttle balance is in order.
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