I own two identical 1992 anthracite 907ie's. I have had the following problem with each of them:

The bike sometimes runs pretty smoothly when tooling around easily; other times it tends to jerk and cough and sputter a little-- to not be smooth. But in hard acceleration and running on up through the gears, then running hard, it does fine. The problem seems to get worse as outside air temperature increases. In cool weather it is not as noticeable. I have open pipes and either Euro chip or FIM chip.
With this problem, the bike is difficult to ride through town but easy to ride on open twisty roads. VArious mechanics have not been able to solve this problem. One changed fuel pressure once and it helped some, but not completely. The dealer in Atlanta has never been able to tell me why it cannot run smoothly all the time.

Has anyone experienced this problem? Does anyone know the solution? It is hard for me to believe that a bike that can run so good and so strongly cannot run that way all time at various speeds...

thanks,
dp

First of all check all connectors to the sensors, corrosion causes faulty readings for the ECM. You also miht want to check synchronisation of the 2 cylinders, both on midrange and idle.

Second you might want to check the air temp sensor in the airbox. If it is defect, the mixture gets leaner thus making the bike run not as good. Sensors like this don't always break down completely, sometimes due to ageing their values seem to shift a bit.

You can find datasheets for all sensors on
http://www.endless-horizons.net/efi/efi.htm
Website is for Cagiva Elefant, but sensors are all identical.

Michiel

I checked my throttle position sensor for the factory spec values. I then ballanced the throttle bodies. I then took the bike to a friend with one of those emmission testers that the states use on cars. He put the "sniffer" in the tail pipe and I trimed the CO to about 3% with the trimmer on the the ECU. It help mine a great deal. Check the FIM site for more information.
du907

Btw, my workfriend had to change pick up to his Elephant 900 GT and when he got new from Italy, it had newer style connector with different wiring (remembering, that new had 3 wires...). They sayed, that cant find anymore that older pick up !!!! :confused: :confused: :confused: I think, 900 GT have just same pick ups, as Ducati 907IE... at least seems just same! :thumbup: