| Author |
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Etennuly
| | Posted on Wednesday, March 12, 2008 - 08:28 pm: | 
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Unexplainable mileage methods abound on the Ulys at least. At 80 mph sustained on the interstate I get around 42 mpg, at 70mph I get 46 mpg.
Fast smooth back road cruising I get 53 mpg, pushing really,really hard on twisties 41 mpg. Running back and forth to town(25 miles) 49 mpg, doing the same and running the crap out of it 50 mpg. Real easy touring on BRP 57 mpg.
It is all over the place and some not making sense. Your mileage will vary. It is hard to mentally prepare for gas stops on trips until you actually see how the riding will be.
I really do enjoy this bike. |
Froggy
| | Posted on Wednesday, March 12, 2008 - 09:29 pm: |
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Mrmajestyk, there was a recall tha went out for that problem with the sidestands. Most of the 07's aren't affected, but the first few months of the build have the old style stand. |
Citified
| | Posted on Wednesday, March 12, 2008 - 10:04 pm: |
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you are getting too much drag from the front tire being on the ground. |
Paint_shaker
| | Posted on Thursday, March 13, 2008 - 12:02 am: |
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MTG,
Low RPMs on a Buell would be below 3000 PRM. Most other sportbikes would probably stall at 3000 RPM (LOL). Just kidding, but their low RPMs are about the limit of the Buell's High RPMs (around 7000). And the Buells do have a relatively flat torque curve.
I find the sweet spot on my 98 S1W to be between 3000-4200 RPMs, while on my 08 XB12R it is 3500-5000. |
Ulyssesguy
| | Posted on Thursday, March 13, 2008 - 02:56 am: |
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I just filled up after a weekend trip where we averaged 80-90 mph and at 215.5 mi i filled 3.447 gal... Thats 62.5mpg wow, oh and my Uly has 14,400 mi on it now... |
Badlionsfan
| | Posted on Thursday, March 13, 2008 - 05:30 am: |
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Unexplainable mileage methods abound on the Ulys at least. At 80 mph sustained on the interstate I get around 42 mpg, at 70mph I get 46 mpg.
Fast smooth back road cruising I get 53 mpg, pushing really,really hard on twisties 41 mpg. Running back and forth to town(25 miles) 49 mpg, doing the same and running the crap out of it 50 mpg. Real easy touring on BRP 57 mpg.
is it really that unexplainable? i see the pattern. when you're on the highway engine rpm and aerodynamic drag is the difference between 70 and 80 mph. back road cruising, at less than 70 mph i assume, less aero drag, better fuel economy. the other scenarios are determined by how often and how hard you're on and off the throttle. |
Azxb9r
| | Posted on Thursday, March 13, 2008 - 04:39 pm: |
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It is a matter of finding a "happy place" for the engine. The faster the engine is running, the more fuel it is capable of using; but the greater the load, the more fuel it is going to be fed.
If you are cruising at 65 mph in 5th gear, and the engine is laboring to maintain that speed, it will get better gas mileage by downshifting to 4th and making it easier on the engine. On the other hand, if you downshift to 2nd gear, the mileage will drop because the higher revs are demanding more fuel.
If you were to monitor engine vacuum while you were riding, you could determine when you were getting your best mileage by choosing the gear that allowed the highest vacuum reading.
This will vary with speed, wind, and whether you are going up or down hill. |
Froggy
| | Posted on Thursday, March 13, 2008 - 08:59 pm: |
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Azxb9r, is there some kind of doohiky i can put on the bike to see what amount of vacuum i have? |
Azxb9r
| | Posted on Thursday, March 13, 2008 - 11:51 pm: |
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is there some kind of doohiky i can put on the bike to see what amount of vacuum i have?
A mechanical vacuum guage would work if you had a place to attach it. You need a constant vacuum source(below the throttle plate) not a ported source(above the throttle plate). The xb has a vacuum port on the side of the throttle body that is used for the evaporative emission system on Cal. models. I am not sure if it is a constant or ported source, but I would be willing to bet it is ported. I am sure that someone else here will know.
If it is constant, you can attach the vacuum guage to it. If it is ported, it won't work
(Message edited by azxb9r on March 13, 2008) |
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