| Author | Message | ||
     Chevycummins |
Slypiranna, I also have leaned slightly to the mechanical aspect of my surge/buck problems. This weekend I had noticed that 3 of the intake valves seem to have excess carbon on them. 1 seems clean on the rear cyl. Also while running at idle and just off idle the rear throttle body seems to have slightly more noise from it. Slight popping like the intake valve is not shutting tight. The bike has 1600 miles on it now. Could this be the root cause of my problems? I'm debating on pulling the valve covers and checking the clearance. I guess at least I might be able to get the rear cover off and check the clearance on the rear cyl. without too much trouble. Valve clearance specifications? | ||
| Crashstp |
tool # b-49259 intake .22mm max .009 .15mm min .006 exhaust .34mm max .013 .27 mm min .01 | ||
| Chevycummins |
Thanks! | ||
| Easyrider |
Have my 1125R in the dynoroom at our shop now and 1 week holiday upfront. Drilled 2 holes in the headers now and put the lamda on the frot and rear exhaust Played a little bit made some runs and looked at the AFV the bike is really running poor. I think the jurky feeling at lower then 3500RPM is based on AFV of 16. I use Race ECM from Buell fully programmable. Keep you all posted with the results | ||
| Xb9 |
(Message edited by xb9 on July 30, 2008) | ||
| Slypiranna |
Chevycummins, I can't answer your question, I am only referring to what I'm finding on mine. If you wonder of this on your 11, perform a leakdown test and note if the intake is leaking? mm | ||
| Chameleon |
This thread is fantastic. It's very exciting to see the progress being made in public view. For those interested in EFI solutions, be sure to check out http://www.megasquirt.info/ Honestly though, I don't think a stand-alone EFI is needed... We just need better understanding/tools to manipulate the stock ECU, such as Gunter's tool. Hopefully it will be adapted for the 1125R soon. (Message edited by chameleon on July 21, 2008) | ||
| Bob_thompson |
And what about this "I use race ECM from Buell fully programmable" that Easyrider spoke of. Availability? Race license needed? Laptop programmable? Let hear some more Easyrider. Although your profile only shows you with and XB9 and an S1. I have been hoping for one for the 1125 from BMC, race license or not. I believe this would be the way to go. And are the 1125's racing still COMPLETELY stock?!!! Still some very important questions to be answered. Bob | ||
| Xb9 |
(Message edited by xb9 on July 30, 2008) | ||
| Slypiranna |
Easyrider, Thank you for your input! Please keep us up to date with all the data that you can record. It is most appreciated. Best regards and luck on your 11, mm | ||
| Chameleon |
BTW, I wanted to add my information to the thread... I have nearly 11,000 miles on my 1125R and really didn't have too much bucking issues, only below about 3,250 RPMs (only a problem in school zones). I did have discharging issues and the stall after cold start issue also. These issues were significantly improved after the ECM update. I generally cruise at or above 4k RPMs, but mostly tend to "ride like my hair is on fire" varying the RPMs widely. I ride from 0' to 1500' sea level with most of it being below 800'. I do not ride with my high-beams on or have any extra electrical periphery. The only thing I really consider to be a lingering problem is the draw issue... I refuse to concede defeat and have thus far not used a tender. I simply use the built-in charger, though for a while that was suspect of being faulty. I now think it's probably fine. | ||
| Easyrider |
XB9, That's really Lean, I have seen worse. I think this can be the reason why the bike is not running smooth on lower RPM. Still have to find some things out about the DDFI Calibration Tool. I Keep you all posted. (Message edited by easyrider on July 22, 2008) | ||
| Easyrider |
Wonderfull.... It's working fine.. The both lamda disconnected and its exactly doing what i want. I am at 22 TPS now and it's promising. The bike is running very poor at low RPM, I can even now in 3th gear run slow miles.. I don't know if anybody had the problem when he is slowly letting the clutch lever go then the bike is shutting off??? You can fix that to by adding more fuel to the 10-12 TPS range at 1400 - 1600 RPM.. Now quickly drinking my coffee and back in the dyno room (-; (Message edited by easyrider on July 22, 2008) | ||
| Bob_thompson |
Dave(Xb9) from that price for the Buell race ECM it looks like you would have to be a real serious racer to go that route. Our rather simple lean fueling problems should be able to be corrected without that kind of expense. I applaud all you guys who are working diligently to find a "cure". Keep up your fine work. Good things are ahead. Bob | ||
| Thurstonbuell |
From the "09 Changes" post , Targeted fuel injectors (?) Updated spark and fuel maps (to be made avail for 08) Relocated 02 sensors What if anything does this add to the equation ??? | ||
| Teach |
Thustonbuell, Maybe better running in that problem RPM range and still meeting EPA standards?? | ||
| Xb9 |
(Message edited by xb9 on July 30, 2008) | ||
| Xb9 |
(Message edited by xb9 on July 30, 2008) | ||
| Xb9 |
(Message edited by xb9 on July 30, 2008) | ||
| Bob_thompson |
I agree with what Teach has said and still the question" why are most 1125's running well and a few are not". Seems like Buell might be wanting to richen up the mixture in certain areas with "targeted fuel injectors" and still meet EPA standards to cure "some owners problems" And I still want an inexpensive ECM program to "do as I want" with no regards to EPA regs. as is my choice as a private owner, at least here in my state. But real glad to see BMC is addressing this issue, I would not have expected less. | ||
| Xb9 |
(Message edited by xb9 on July 30, 2008) | ||
| Slypiranna |
Concerning the new injectors. The word atomization comes to mind. The better the mixture of the A/F charge, the leaner an engine can be tuned and still run efficiently. With SOME 08's, liquid fuel is obvious at low rpms and this greatly contributes to major intake deposits that some of us are finding at very low miles. There is very little "wind" or velocity in this intake port at low engine speeds. I question whether or not this also affects our herky jerky zone? I think so as enrichening helps this area. I agree Xb9, they changed these things for a reason, not just for a few. After all, "we" (badweb) are the minority of 1125R owners. I'm game for testing new injectors! Someone shoot me part numbers!  It will be interesting to see the new mapping and compare the pulsewidth to what we have now. (Message edited by slypiranna on July 22, 2008) (Message edited by slypiranna on July 22, 2008) | ||
| Slypiranna |
New O2 location? Answer, look at where they are now. After the merge would be a much better place to position them. Also note just how far up they are spaced out of the exhaust stream. They did this, I believe, because installing it "correctly" in such a small diameter would have hindered exhaust flow. The o2 bung on the 08 11 is very tall and positions the tip on the outer or boundery layer of flow...just my opinion... Honda car tuners have spaced the secondary o2 for years now...in order to fool the ecu when high flow cats are installed. In effect, it makes the o2 somewhat, inaccurate. These changes do make sense. Nice to see BMC improving. (Message edited by slypiranna on July 22, 2008) | ||
| Bob_thompson |
I have to agree totally guys. This was not done just to please a few complainers. Even though there are quite a few good running bikes I believe as you do that there is, at least, a pretty good concern BMC has to get these bikes running as perfect as possible and still meet EPA regs. It must have been somewhat of an embarrassment for Buell to have the bike magazines test bikes that were not as perfect as they should have been for a great review. For you guys with the equipment that choose to test the "new" programs and injectors, it will be real interesting to see in numbers, A/F ratio, timing, etc. just what the change will be. If BMC had to change the O2sensor location and the injectors to get better (read hopeful richer) fueling to cure some problems and still meet EPA regs. just maybe the new program and the old injectors and original O2 sensor location would richen it up even more. I believe that would be a good thing. Comments please? | ||
| Xb9 |
(Message edited by xb9 on July 30, 2008) | ||
| Xb9 |
(Message edited by xb9 on July 30, 2008) | ||
| Chameleon |
You're right Xb9, the Feds will not allow Buell to release new code for the 2008 bikes without a thorough certification process. | ||
| Easyrider |
Oke, Finished the fuell map today and took the bike for a ride. I will post dyno sheet tomorrow. I started with 122 HP and finished with 138 HP SAE corrected on the rear wheel with stock air filter and stock exhaust. This is european specification With catalyc convertor. All the jurky feeling is gone at lower RPM. I can even drive in 6th gear 60-80 km p/hour you can feel the engine is not liking this but it still runs smooth. It's unbelaivable what a strong bike at lower RPM.. And at 8000 RPM its really kicking in now.. I defenitly need a steering demper now. I think the concept of the engine is really good in basic. I am wondering what a air filter will do, with some little airbox modification and a Saron exhaust this will be the next project. I will post dyno also later on. I can tell you remapping is the real thing to do. The bike is running on all the TPS setting very poor until 4000 RMP and way too rich and poor after 4000-10000 RPM. After the new fuel map it runs really strong from 1500 RPM until 10000. And I can hear it's sucking air in the airbox, there is also a deep airbox sound extra now at 5000 RPM.. really Nice. | ||
| Xb9 |
(Message edited by xb9 on July 30, 2008) | ||
| Bob_thompson |
Easyrider, as Xb9 has said "great to hear your success" and I add my cudo's as well which brings up the question: will this have any effect on those people who are having problems or as myself just want a better running bike? I.E. will what you have done be available to people who do not have a dyno available or the sofistication of altering fuel maps, etc? Is this going to be something that is or may be available without a race license and am I correct in assuming you are using a stock Buell "race" ECM. If we were to be able to purchase one of those "race" ECM's would mapping be so complicated as to keep an average guy from doing it? And lastly as you stated in a previous post about a "fully programmable race ECM", is why you have had to change parameters if its already a race item and your bike is basically stock? Hope these questions do not seem ignorant but I am still learning much about DDFI. Thanks for your fine input. Great thread. Bob |
