| Author | Message | ||
     Fresnobuell |
Nice writeup Spectrum. I would have gone longer, but unfortunately work interfered. Whats more I'm now actually power sliding the rear wheel while doing this. When I picked up mine this afternoon, there was a congregation of 10 or 12 Harley riders at the dealership. Not sure what was going on, didn't really care honestly. Well, I wasn't sure how my 25r was going to perform at launch (and I sure as hell wasn't gonna stall it in front of the crowd that was giving me too much of their attention), so I gave her some good throttle and did a power slide out of the driveway. Hope they liked it. It was a bit unintentional and the cold tire certainly helped, but it sure was fun. I couldn't help but think of the youtube video I watched yesterday of a guy, all dressed up in Suzuki leathers and gloves, riding a new Gixxer 1000 wipeout doing a similar thing leaving his dealership. Oh well, maybe I am getting the hang of this riding thing... | ||
| Badlionsfan |
So Fresno, can you at least admit that your bike is "more perfect" than it was before? | ||
| Fresnobuell |
Bad-- I do think that it will be better. Honestly, I only have 20 miles or so on the new flash, most of which on the freeway. The only thing that I can conclusively say right now is that I definitely like the quicker revs and sharper throttle response. I just haven't had the time yet to form an real opinion on the the other issues (MPG, heat, driveability). I would like the A/F values to settle. I made the mistake of not recording them before the flash. DOes a value of 80 something in the front and 100 in the rear sound odd to anyone? What does this mean exactly? | ||
| Court |
>>>I gave her some good throttle and did a power slide out of the driveway. That is cool! . . . I would have loved to have seen their faces. | ||
| Dalton_gang |
Nice sales pitch Spectrum. I`m sold. Maybe Sat morning I will go get it done. | ||
| Fresnobuell |
Well, had some more miles this afternoon. Now I am convinced that the engine is running at least 10 degrees cooler and seems to recover from a spike in temperature quicker. Pre=flash: Pick any day this summer and the 25r would settle about 210-212 and spike up to 216-218. Rarely, would it recover to under 210. I would happy if I could pull into the driveway and be under 210. Post-flash: In similar temps on a similar ride (way home from work), bike hovered around 200 and spiked to 206. I pulled into the driveway at 200. I think if I was not running her so hard (had to make up for her being in the shop for 3 days) it could have maintained in the mid-190s. | ||
| Fresnobuell |
Is it even possible for the bike to not take 100% of the flash? My service mgr suggested I get it re-flashed next week. Opinions? | ||
| Danimal25r |
I want exhaust for my 1125r interested in the hr1 (hardrockmotorsports) i read about the drummer and the jardine but havent heard them. Ecu?? What about airfilters to is there anything aftermarket?? I would like to see a few more ponys and make a lil noise thats all  | ||
| Chameleon |
Danimal: do not thread jack. Harlan: It is possible for a flash to not "take" and have to be re-done. If you got a post-flash print-out confirming the desired calibration number, then the flash was successful. | ||
| Fresnobuell |
I did request the the post-flash printout and it confirmed that proper calibration number. The engine temp is down and MPG is up, so that part of the calibration is working. I believe the flash was done correctly. I just have what I would consider minor driveability issues. I am focusing on the O2 sensors as possible culprits. My AFV on the front is down to 81 again today. | ||
| Xb9 |
If drivability issues still exist after the new calibration, take it back to the dealer and have them reference Tech Tip TT390 TT390 – September 18, 2008 – Diagnosing Buell 1125 Drivability Issues Tips for Diagnosing Buell 1125 Drivability Issues It's a written diagnostic procedure to check several things and if everything checks out OK the throttle body may need to be replaced. | ||
| Zac4mac |
Harlan - get a new O2 sensor... that front one sounds totally flaky if it isn't partially plugged in. With any computer program, data corruption is possible. I doubt you'd get confirmation tho if the checksums don't match up. I didn't get the print-out from the flash, but I checked H-Dnet and all campaigns are closed except the latest, 0504, which fixes the kickstand spring, dipstick and fuel smell. Z | ||
| Ccryder |
Z: Fuel smell fix? What's that entail??? | ||
| Chameleon |
Neil: see this thread. http://www.badweatherbikers.com/buell/messages/290 431/400792.html?1223218941 | ||
| Josh_ |
So what's everyone getting for MPG now and what happened to the clowns who swore Buell couldn't improve MPG with a flash upgrade? I went from 33MPG AVG to/from work to 42MPG. Cruising at 70 I went from 35MPG to 44MPG! Hey's its not a tuber but now it beats my FJR! | ||
| Ccryder |
That's what I'm getting now. It's about the same as my ST13. | ||
| Zac4mac |
I was rock solid at 37 mpg before the flash, 12k+ miles. Since the reflash, about 2-300 miles, somewhere around 40 mpg, it's still moving a bit. Also, before, AFV of 100/100 had me riding a popcorn machine at 5000' elev. Now, still at 100/100 since the flash, she's running almost as smooth as she did at 94.5/94.5, her smoothest setting. Wish she'd learn, have tried several runs at my "learning road"... 5 miles at 45 mph to no avail. Time2GetReady Zack | ||
| Fresnobuell |
I just got 35.5 MPG on mostly spirited mountain riding. I never would have thought 167 miles on one tank was possible--and I could have gone another 10 without too much worry. | ||
| Chameleon |
Zack, is it possible that 100/100 might be perfect for your bike at your elevation with the new fuel map? | ||
| Spectrum |
I doubt 100/100 is perfect for any situation. The rear cylinder runs hotter therefore it will almost always require more fuel that the front. | ||
| Steeleagle |
Mine was 105/105 pre-flash and is still sitting at 105/105. The numbers have never moved. I have no complaints re; performance or driveability now, but seeing everyone else's numbers makes me kinda say "Hmmm!!" | ||
| Chameleon |
I doubt 100/100 is perfect for any situation. The rear cylinder runs hotter therefore it will almost always require more fuel that the front. 94.5/94.5, her smoothest setting. 'splain that one. | ||
| Spectrum |
Lol, I'm to ignorant to explain any of this. In theory, it is normal for the rear to require more fuel. Perhaps one of the more technically knowledgeable here could provide some explanation. Maybe XB9 or Sly, etc? | ||
| Bob_thompson |
Bryan(Spectrum), if I remember from some people who raced HD's on the salt flats a while ago; with the older models and intake between the cylinders, even with fuel injection which was then just throttle body injection, the rear cylinder did in fact run hotter but it was generally accepted that the reason was the HD firing order which is some weird configuration with cylinders firing close together and then a long pause therefor the typical HD lump or stagger sound. What it did then was when the front intake opened and closed followed directly by the rear the front would actually rob some mixture from the rear, or maybe it was the reverse, causing a little leaner condition. The cure was to angle the carb mounting flange slightly(about 3 degrees) toward the rear cylinder favoring that cylinder. It did in fact work. It was then a well kept secret of the HD racers. I did that very thing on my 86 c.i. street cafe racer and for the very first time saw my plug reading exactly the same on both cylinders(usually the front would be darker). Fast forwarding, that condition does not exist with our 1125's with a relatively even firing order, downdraft F.I. and liquid cooling even though the rear cylinder might not get quite the same air flow as the rear it would be negligable. Sorry about the long text. Just my take on what I've learned. Any other suggestions about this from others? Bob | ||
| Chameleon |
I do understand and agree with the typical motor having a hotter rear cylinder requiring more fuel to keep it cool, but perhaps, for some reason, Zack's motor has cylinders with unequal thermal properties in such a fortunate configuration that they are well balanced. That would appear to be the case considering his previous AFVs being evenly balanced. I honestly have not kept a keen eye on the AFVs on Vicky (my bike) because she runs very well and I have had no reason to investigate these issues. I do not typically run her under 3.5K RPMs and she stays happy. I suppose I should have at least documented the AFVs for posterity before she went into the shop for the update (among other tasks)... Hmm, they open in 5 minutes; perhaps I should inquire while I call to ask them to perform campaign 0504, which I had already planned to do today. | ||
| Chameleon |
the rear cylinder might not get quite the same air flow as the front That was my line of thought as well. | ||
| Xb9 |
I would guess since it's water cooled the rear running hotter maybe a false statement. Anyway, It's obvious when looking at the maps that Buell develops the mapping specific to each particular cylinder. (It's really like two single-cylinder engines, each done separately) | ||
| Bob_thompson |
I agree David(Xb9), but if either front or the rear were to get a wrong signal from a faulty O2 sensor and its getting leaned out I believe that could cause extra heat on that cylinder as we have learned before on all these great posts. I agree with Zac also and when I can I will probably have a spare O2 sensor in my tool box, just in case. | ||
| Spectrum |
Well at least on my 1125R. The rear cylinder has consistently had a higher AFV than the front. | ||
| Xb9 |
       Done right it's a beautiful thing. You can some general differences front to rear. |
