| Author |
Message |
    
Playwithgravity
| | Posted on Thursday, December 03, 2009 - 11:54 am: | 
|
Took my 2006 12R in for a list of problems including a TPS that wouldn't hold it's settings. Fixed it up except for a stutter in 3rd gear, every time you roll it on HP drops from 84.9 to zero (dyno confirmed). I did lay the bike down and broke the shifter off some time ago, so I'm GUESSING it might be mechanical. Anyway, HD/Buell tech support says its an issue with the Buell Race Kit that I had installed 30,000 miles ago and, quote, "The rider must simply drive through it." Nothing else can be done. That sounds like a load of hog ***** to me. Anyone else ever experience any stuttering like this?? |
Froggy
| | Posted on Thursday, December 03, 2009 - 04:49 pm: |
|
A muffler causes a loss of power in only 1 gear? Fat chance. The race pipe DOES cause a dip in the midrange power, but its not all the way to zero, and not in only 3rd gear.
Please try to describe what happens when this power loss occurs, do the RPMs rise real fast like its in neutral? |
Playwithgravity
| | Posted on Thursday, December 03, 2009 - 05:18 pm: |
|
The stutter happens very quickly, you wouldn't know HP drops to zero unless you saw it on a dyno chart. It feels as if the engine misfires once or twice, or maybe like there are teeth missing from the belt (which there aren't).
I don't know much about transmissions but it seems like a transmission issue to me. Especially since I laid it down on that side not that long ago. I wonder why HD/Buell tech wouldn't think to check that?? I wonder why they would say "Ohp, guess there's nothing you can do. You just have to ride it like that" [and hope it doesn't dip like that mid corner and send you careening to your death]. grr.
Any advice? |
Sparky
| | Posted on Thursday, December 03, 2009 - 11:21 pm: |
|
What gear was it in when you laid it down? If it was 3rd gear and the impact was great enough to break off the shifter, there's probably internal damage with the shift mechanism to where it doesn't completely engage when going up through the gears. |
Playwithgravity
| | Posted on Friday, December 04, 2009 - 07:25 am: |
|
Not sure what gear I was in, but your logic works. |
Playwithgravity
| | Posted on Saturday, December 05, 2009 - 02:06 pm: |
|
Wow, the dealer here in NC just told me there's nothing more they can do for me so I'm getting my bike back with a bad stutter in third gear. No good  |
Froggy
| | Posted on Saturday, December 05, 2009 - 02:52 pm: |
|
If it is transmission damage, your looking at tons of cash to fix it. Because it was most likely related to the wreck, you might want to contact your insurance and see if they will pay for the repair. |
Mmmi_grad
| | Posted on Saturday, December 05, 2009 - 03:09 pm: |
|
These kinds of studders can be a lean condition in the accelerator pump function in the ECM. On a x1 you turn up the accel setting. I would think most of the time it would be a dip in the dyno chart, could it ever last that long to go to 0?
Remember even though it maybe a race ecm doesnt mean that the epa still hasnt got its fist around your neck somehow.
(Message edited by mmmi_grad on December 05, 2009) |
Reepicheep
| | Posted on Saturday, December 05, 2009 - 08:30 pm: |
|
if it just bent a pin in the end of the drum, or bent the shifter pawl, it could still be a cheap straightfoward fix. |
Playwithgravity
| | Posted on Monday, December 07, 2009 - 08:18 am: |
|
Reep, can that pin and pawl been seen by removing just the primary cover?
Additional detail for the symptom: if you easily accelerate through third it bumps just a little bit. If you keep the hammer down up to 90 mph or so in third it sputters the whole time.
I was quoted 10 hours labor to split the cases and inspect the transmission.
MMMI, I appreciate your input but I'm not understanding what you're suggesting. |
Akbuell
| | Posted on Monday, December 07, 2009 - 10:49 am: |
|
IMHO, if there was a mechanical issue w/the transmission, the bike would shudder when in that gear, but there would not be a change in power delivery (from the engine to the trans). Have you pulled the trans plug and looked for debris on the magnet?
Since the bike was dropped once, I would carefully inspect the wiring harness. My local dealer in Ak had a bike come in that had been dropped, and had an intermittent stumble. (Wasn't necessarily limited to one gear, though) Guy had taken it too 2-3 other folks before getting to the dealer. Anyway, the problem turned out to be nicks in a red wire in the main harness in the area of the seat/tank junction, which allowed electricity to 'escape' at random intervals.
Hope this helps, Dave |
Reepicheep
| | Posted on Monday, December 07, 2009 - 12:34 pm: |
|
You can inspect the pawl by removing the primary cover... then pulling the clutch assembly, stator bell, and primary chain as a unit. Not trivial, but better then splitting the cases. And probably necessary as a step for splitting the cases anyway.
If it was a tranny problem though, would think you would get one big whack, or one little whack, or nothing. Not a stutter... |
Playwithgravity
| | Posted on Monday, December 07, 2009 - 05:13 pm: |
|
I guess that's maybe why the dealer(s) think it's not the tranny. |
Sparky
| | Posted on Tuesday, December 08, 2009 - 08:21 pm: |
|
quote:Fixed it up except for a stutter in 3rd gear, every time you roll it on HP drops from 84.9 to zero (dyno confirmed).
Any chance you could post up that dyno run? It would be interesting to see how drastically it "stutters" and perhaps may explain one thing, as follows.
I'm thinking that a roller dyno printout should show HP & torque results as continuous lines with perhaps dips but not 'zero' dropouts if there were interruptions with power delivery due to mechanical gremlins like worn gear dogs or a slipping clutch.
But since the dyno has a lead attached to a spark plug wire (correct me if I'm wrong here), and if there were ignition dropouts coinciding with the stutter symptoms, those would show up as 'zero' points in the dyno graph, no? |
|
Troubleshooting (Poor Starting/Running/Handling/Ride Issues) »
Archive through December 21, 2009 »
3rd Gear Stutter