Abysmal gas mileage - K-Bikes.com - Excellence in Motion
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post #1 of 17 (permalink) Old Dec 17th, 2005, 3:11 pm Thread Starter
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Abysmal gas mileage

Before my 600 mile inspection (K1200RS, build date 11/03) I got 33, 32, and 30 mpg on successive tanks of gas. At the time of the inspection I told the service manager that I hadn't experienced any throttle response issues, but that I had heard that some people who had the ECU swap saw improved gas mileage. The ECU was replaced and I was content. Today (riding with Pat Darke on his swell new R) I ran off a tank of gas and got 22 mpg. The gas light came on at 80 miles. We rode conservatively and the ride included around 40 highway miles at 70 to 80 mph. There are about 900miles on the bike.

Any ideas?

Jersey Shore
K1200RS '04
BSA Victor '68ish
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post #2 of 17 (permalink) Old Dec 17th, 2005, 3:38 pm
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First thing is to average at least 4 consecutive tanks of gas to get a true picture of your mileage. But, it sounds like you are close and it isn't good. Does it smell really rich when you start the bike AND after it's warmed up? Since the bike has a catalytic converter there are other things that might be off. The dealer should be able to detect them with their hi-tech monitor though.

Last edited by chrispat; Dec 17th, 2005 at 4:29 pm.
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post #3 of 17 (permalink) Old Dec 17th, 2005, 3:52 pm
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22 mpg is way below acceptable level for even the most "spirited" driver IMHO. It must be a defect that should be fixed under warranty.

Good luck !

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post #4 of 17 (permalink) Old Dec 17th, 2005, 5:15 pm
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Originally Posted by BillA
Any ideas?
I'd look for a gas leak.
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post #5 of 17 (permalink) Old Dec 17th, 2005, 5:29 pm
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I'm with Detour. Do you smell fuel?... You should be able to run the piss out of it (hard in the twisties or 100mph+ on the slab all day) and still get 30-35.. I rarely get less than 35 (since I've had the ECU change) no matter how I ride it.
Bring it to the dealer would be my recommendation.
Good luck
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post #6 of 17 (permalink) Old Dec 18th, 2005, 4:09 am
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Check the plugs, wipe the inside of the muffler spout. If very black or sooty, there's a problem to sort. If OK you might have a fuel leak to sort pretty quick.

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post #7 of 17 (permalink) Old Dec 18th, 2005, 6:51 am
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Have a quick look on the right side of the engine about two inches above and four inches back from the oil filler cap, that is where you will find the quick disconnects for the fuel tank. Check for leaking. They would have removed the tank to replace the ECU.

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post #8 of 17 (permalink) Old Dec 18th, 2005, 8:52 am
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I get 160 to 170 miles per tank. You have a problem.

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post #9 of 17 (permalink) Old Dec 18th, 2005, 9:01 am
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Thumbs up

I've managed to get as low as 27 with some spirited application of throttle.
Typical is 32-35.
I almost always ride w/loaded bags.
I use Z-Tech short in summer and RS stock screens in winter.
I'm about 225-230 lbs on bike.
Some extra drag as top of helmet at @6'8" of so.

22mpg would indicate a serious proble, As posted, determine if there is a leak immediately.
Good luck.
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post #10 of 17 (permalink) Old Dec 18th, 2005, 10:39 am
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I'd say you've got a problem. In the last 5,000 miles, I have never been below 38mpg, and that was on a very cold, very spirited ride. Hound the dealer to find out why.
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