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Diablo1
| | Posted on Monday, July 21, 2008 - 08:46 pm: | 
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There is no reason not to expect at least high 30's low 40's on a bike like this. As a matter of fact with the light weight I would expect mid 40's. Read some other forums...if a 650 lb Concours can get over 37 I think this bike should be able to make it as well. It is an area that Buell needs to work on in the next revision. }
Right on brother. The low fuel mileage and iffy throttle response point right at the fuel injection/fuel mapping. With the right map, the bike should get 40+ mpg. Other 120+HP twins do. Unfortunately, it will be up to the factory to correct the problem, on their own schedule. The aftermarket fueling experts }don't have a system to work with the Buell ECU. |
Jpfive
| | Posted on Monday, July 21, 2008 - 09:45 pm: |
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Which 120HP+ twins are getting 40+ MPG? Not trying to be smart, just curious.
Jack |
Diablo1
| | Posted on Monday, July 21, 2008 - 10:20 pm: |
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Which 120HP+ twins are getting 40+ MPG? Not trying to be smart, just curious.
Jack
Rotax motor, 60 degree V-twin, 998cc, Factory Pro chip....45 mpg average over a full tank, on the highway with speeds 70-80 mph. }} |
Jpfive
| | Posted on Monday, July 21, 2008 - 10:27 pm: |
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My Caponord, with that motor, would do that, but it was only placing mid 80's to the ground. Even so, it required a custom remap to get into the 40+ mpg range. My buddies with Futura's were in the mid 30's for mileage - a little higher state of tune on the same engine - but still not putting 120 HP to the ground. Which Aprilia were you riding?
Jack |
Madav8tr
| | Posted on Monday, July 21, 2008 - 10:40 pm: |
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"Rotax motor, 60 degree V-twin, 998cc, Factory Pro chip....45 mpg average over a full tank, on the highway with speeds 70-80"
Not according to any of the Mille or Tuono riders I know. They get between 30-35 if they are lucky. Head over the RSVZone or the Apriliaforums and see what their consensus is on the fuel efficiency of the Rotax powerplant? I just did a search and most were getting low 30's and a few in the 20's. Some owners were claiming 40 or so but the general opinion is the Aprilias get terrible gas mileage just like every other high performing twin on the market. |
Fresnobuell
| | Posted on Monday, July 21, 2008 - 10:47 pm: |
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+1 Madav....I ride occasionally with an RSV owner and his gas mileage is comparable to my 25r. |
Jspeed
| | Posted on Monday, July 21, 2008 - 11:19 pm: |
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Alright....couldn't help but through my 2 cents here. Why we would we possible be talking about gas mileage. The R in 1125R doesn't stand for reserve gas, it stands for racing.... and if you get other V-twins to perform at plus 40m.p.g. of even other 4 cyl.
bikes with 1000cc or better get better than 40 m.p.g. u have to ride like a girl or have a very limited range of motion in your right wrist!!! At 16 I got my first street bike (yzf600) not better than 40 mpg, I owned honda a cbr 900 and my favorite Honda the V-twin superhawk, I've also owned the entire Suzuki R line-up (from the 600 to the busa) and I can tell you this....if you are getting over 40.m.p.g on these bikes you might have bought them for the wrong reason or, if u didn't give me a call, and I'll get you set up with a good instructor that can teach you to utilize the power of these race bikes. Gas mileage gooo-roooos, try the BMW LT1200 or a scooter!! (If this message seems a little hostile I apologize, it's my day off....I put the 1125R away at 3p.m. and then played bags until the tequila was gone) |
Diablo1
| | Posted on Monday, July 21, 2008 - 11:47 pm: |
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Not according to any of the Mille or Tuono riders I know. Some owners were claiming 40 or so but the general opinion is the Aprilias get terrible gas mileage just like every other high performing twin on the market.
I'm not giving you an "opinion" of my gas mileage. It is my measured mileage. The reason it gets 45 mpg and others don't is because it has a Factory Pro chip with the correct matching fuel pressure. I'm fairly confident other custom fuel maps could do the same. When I do a lot of in-town driving and frequent starts from cold allowing the bike to warm up, the mileage goes down to 37 mpg. If I get on the highway or secondary roads and ride out a tank without stopping, it gets 45 mpg. And yes, it's a Mille with slipon mufflers that's been derestricted. My original point was that high performance twins do not have to get lousy mileage, although frequently they do as delivered from the factories. I'd bet that when they come up with a map that straightens out the Buell below 4,000 rpm, a miracle will occur and the mileage will increase significantly.} |
Madav8tr
| | Posted on Tuesday, July 22, 2008 - 12:01 am: |
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Well Diablo, you're the exception to the rule. The vast majority of riders on Mille's aren't getting what you're getting economy-wise. The vast majority of high performance V-twins get basically what we get. Having owned 2 RC51's, a Duc 996S, a 748, a TL1000R and now the 1125 I am seeing similar fuel consumption between all of those bikes. I knew going in to the 1125 purchase that fuel economy would suck based on my previous experience with high performance twins and I am not bothered by it. I also don't expect it to improve(much?). If the fueling is made better, my mileage won't go up because I will just be riding it harder. |
Blake
| | Posted on Tuesday, July 22, 2008 - 12:32 am: |
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I'm seeing three possible differences that could help account for a fuel mileage anomaly.
1. Wind resistance (aerodynamic drag) plus rolling resistance is different.
2. Engine efficiency is different.
3. Air/fuel ratio is different.
4. Specific energy of fuel is different.
Which of the above four possible reasons do you believe account for your Aprilia achieving better mileage than is typical for sporting literclass motorcycles?
And... Riding in a tail wind doesn't count. |
Bcrawf68
| | Posted on Tuesday, July 22, 2008 - 02:04 am: |
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I spoke with a BMC tech today. He said a new ECU map is coming that will iron out the driveability problem some are having. He also said it would improve the MPG some. Hopefully, they will release the new map soon. |
Fmaxwell
| | Posted on Tuesday, July 22, 2008 - 05:00 am: |
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Late answer, but I'm not getting one because:
1. The ergonomics just aren't comfortable for me. I still love my XB12Ss.
2. The powerband is too high in the rev range and the bike had a somewhat frantic feel as a result. I like the low-rpm grunt of my XB12Ss.
3. Too many bad reviews. I don't get to ride every bike made, but the guys who do seem to be pretty disappointed with the 1125r.
4. Too many problems reported. Just look in the reviews and in the Buell forums and there are a lot of problems which have not been addressed.
5. Problems I noticed in my test ride: Uncomfortable heat on my legs (I could understand that if it were air-cooled), driveline lash, front brake was strong but lacked linearity and feel, rear brake was typical Buell -- dead feeling, same crappy switchgear on the handlebars as the XBs, buzzy engine vibration through the pedals.
6. MV Agusta. Buell was supposed to be Harley's way to get a better footing in Europe. So why the MV Agusta purchase? I'm going to hold out on this one and see how this affects Buell.
7. Dealers disappearing. There are too many dealers dropping Buell, including the one nearest my home.
I'm sure that many owners are happy with their 1125r purchases and I wish them the best of luck and certainly don't mean to imply that they made a bad choice. Every rider has different criteria by which they judge bikes. |
Diablo1
| | Posted on Wednesday, July 23, 2008 - 10:15 pm: |
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I'm seeing three possible differences that could help account for a fuel mileage anomaly.
1. Wind resistance (aerodynamic drag) plus rolling resistance is different.
2. Engine efficiency is different.
3. Air/fuel ratio is different.
4. Specific energy of fuel is different.
Which of the above four possible reasons do you believe account for your Aprilia achieving better mileage than is typical for sporting literclass motorcycles?
And... Riding in a tail wind doesn't count.
Well, let's see. My bike has an FP chip which alters the fuel and ignition timing map. My Mille is just as aerodynamic as any other Mille, which means it's more slippery than the Buell 1125 (compare top speeds reported by magazines...+13 mph for the Mille). And now, apparently Buell agrees, as they are coming out with a new (ta..da) fuel and ignition map that will "significantly improve fuel mileage and the way the engine runs below 6,000 rpm". Specific energy of the fuel is the same as any other pump gas. Engine efficiency improved}? Only as it relates to having a better fuel-air ratio and ignition advance. |
Blake
| | Posted on Thursday, July 24, 2008 - 01:03 pm: |
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So your answer to my question is that #1 and #3 listed above are better optimized or more efficient on your RSV?
I left one other possibility out:
Manner of operation, meaning riding very conservatively versus aggressively can greatly effect fuel consumption.
Concerning aerodynamics, did you know that the effect of a motorcycle's rider and his gear on overall aerodynamic drag can be HUGE?
I'm guessing though that you are not a petite person who rides around in custom fitted skin-tight leathers. If you are, well there you go. 
Regardless of the reason for your excellent fuel mileage, I say good for you! I think it's great that you can achieve 45 mpg on a liter class sport bike. |
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