Bike Stalls Once Warm and over 5500 RPM

[angelix]

My 907 has a K&N without the Lid.

I tried with the lid and it did not change very much (except the noise...)

You need to try a different ECU box and check if the problem lays there.

If by changing the ECU it solves the problem, then put the old EPROM in the NEW ECU just to check if the issue was due to a bad burned/defective chip

there are the sensors to be checked (RPM, Phase, Air T, Water T Absolute pressure , TPS) see if you can borrow "working" ones and replace them one by one, maybe there is one failing and jams the ECU.

[higgy]

there are the sensors to be checked (RPM, Phase, Air T, Water T Absolute pressure , TPS) see if you can borrow "working" ones and replace them one by one, maybe there is one failing and jams the ECU.

at last a sensible post,about time

sensors are easily checked not likely to be the ecm although it does happen from time to time

[paso750]

what you could also do is get a lambda sond collet welded in the header (they are not expensive) and find someone with an LM-2 to check the AFR (air fuel ratio) while riding.
A normal K&N filter won`t influence the AFR much, but there are different models. 3 that fit in the Paso/907ie. The high versions won`t properly fit with the lid and require adapting the setup. If you have one of these and the aftermarket exhaust you could theoretically run lean.

[ducbertus]

you bring me on to an idea.
I have a lambda reader somewhere when I cured the Weger on my 900SS.
would be interesting to see how my 907 performs.
I believe there is a potention for improvement.

Bertus

[giarcg]

I recently picked up two 907's from a Forum member, a '91 and a '93. The '93 did a similar thing as described by Fast Eddie, it would run fine for a few minutes and then start stumbling (at any throttle setting) as if it were starving for fuel and eventually die. Recycling power via the ignition switch or handlebar kill switch would bring it back to life for a few minutes and the cycle would repeat.

I've found that the beauty of having two of these bikes is having the ability to swap parts for troubleshooting so I first tried the ECU's...no change. Next I swapped fuel tanks and bingo! It ran fine.

Looking into the problem fuel tank I found that the fuel line between the pump and fuel filter appeared to have collapsed due to a sharp bend and also that the strainer below the fuel pump was positioned in a way that partially blocked the pump inlet. I replaced the fuel line with a longer section that curved more gradually and re-clocked the strainer. Re installed that tank and problem solved.

I don't know how cycling power relates to a possible fuel starvation problem but other than dealing with the fuel hose and strainer the only other variables would be disconnecting and then reconnecting the pump wires in the tank and the main connector underneath the tank.

Now if I could just figure out the low engine speed misfire issue.....

[du907]

Low speed miss fire: do the old cigarette butt trick in the hose of the pressure sensor (I think that's right). Search this site for the threads.
du907

[giarcg]

Low speed miss fire: do the old cigarette butt trick in the hose of the pressure sensor (I think that's right). Search this site for the threads.
du907

Thanks but I tried that. No effect. Interesting problem in that it rarely occurs on first start of day, even after warm-up. When the bike is shutoff and restarted when warm it happens fairly consistently. The '91 does not do it at all so Ill be doing some more part swapping.

[Fast Eddie]

Maybe its just the Ohio weather

[Mc tool]

Maybe its just the Ohio weather

Les Nessman

[Fraser]

Don't forget the chest slaps to simulate broadcasting from a helecopter.

Fraser.

[Fast Eddie]

Update: I finally gave up trying to fix it myself. I called two Ducati dealers and both refused to work on it. The third, Lexington Motorsports, took it in, back in July. They still have it! They keep telling me that they have my bike on priority. First it was the carbs (until I told them it didn't have carbs), then the ECU and now, after they got rid of most of their service department they say that the TPS had to be rewired and reset. I asked if I would have my bike back by 2012 and they insured me that would happen. So, they have one day left. I wish I lived closer to the shop so that I could go and check on it. I may have to take a road trip next week.

[Mc tool]

Im pretty sure I've said this before
PUT A F@#%ING WEBBER ON IT

[higgy]

Eddie, get it outta there now !!!! Don't pay shit !!!!!

If you have even basic skills many here can walk you through what needs to be done all for the price of asking

Can you turn a screwdriver and afford a 20 dollar multimeter from Radio Shack ?

Follow directions ???
It really is that simple I f Mctool and I can do it believe you me so can you

Right Hammish

[oceanhunter]

Higgy is right,don't be afraid to learn the unkown,"USE THE FORUM EDDIE"
it's helped me!!!!.(thanx everyone,i'll share what i have learned when i
figure out how to post.)

[Mc tool]

I agree with Higgy ( and probly others ) you need to get your bike out of that shop quickly. If they knew what they were doing they would have fixed it asap , what is likely to happen is that they will "save it " till they are quiet and then muck about , possibly even set the apprentice on to it , treat it as a learning opertunity , AND charge you for every nano second they spend on it, and you will get it back either the same or worse than it was.
giarcg might well be onto summat here , with the hoses, thier condition and placement . years ago I had car trouble whilst trying to drive from Christchurch to Invercargill. ( with a wife who had just had a hyster whatever ) the car ( mk1 2dr escort ) decided that it would only go for short periods, a fuel supply problem was quickly diagnosed ( every time it stopped , removing the carb top revealed an empty float bowl ). After repeatedly cleaning and checking everything ( even partially drained tank ) stripping carb and fuel pump on the side of SH1. Heart breaking stuff ( she was pretty crook ). Turned out to be a little sausage of shit ( I think the remains of a disintergrating fuel filter) in the fuel line between the fuel pump and the carb. Whilst the engine was running the lump of shit would slowly rise up the fuel line till it blocked the float valve...... car stops . By the time I had the top off the carb the lump of shit had slid back down the fuel line and sat at the pump outlet . turning engine over provided a good squirt of fuel ( mechanical pump ) at the float valve, and upon reassembly the car would go..... for a short time. A lesson I will never forget
Welcome aboard oceanhunter . NO forum can have to many Kiwi"s