Tune/service and now a hesitation at low load

[blazing928]

Hi
just had valves, belts, chain sprockets etc as well as resetting the TPS, throttle balance and trimmer.

In general its been a great sucess, the bike is much smoother and more responsive.
It was still hard to start. I normally have to give it some throttle and a high 2500rpm idle for a minute before it will fast idle.

His technique of starting, which is push start button and then slowly turn fast idle lever until it catches wouldn't work.
The CO2 level would seem a bit lean according to the mechanic. If he turned the trimmer it just put out more CO2, didn't run better.

He tried reading my chip, a FIM BSP0, but it woudn't read.
He tried some others including the one from his 888 and they worked better, so we decided there may be a chip problem.
I took the chip from my other bike, a FIM BSP3, which is 3% richer.

Wow, the bike started without even the fast idle from cold, seemed a bit quieter and even smoother. Happy Nigel!

However.....at very low load, say 60kmh [30mph] the bike is hesitating and popping when trying to maintain that speed. Get to 100kph [60mph] and its fine, smooth, very punchy, really wants to go.
In general under load its really good, very slight throttle its like one butterfly is not in sync or sticking.

So thats my theory, the circuit the bike uses at very slight throttle is not right.
Just thought I would ask before i speak to him tomorrow.

I have ordered a Feracci stage 1 chip anyway as the other FIM one seems to be playing up.

Higgy he has a lot of files, maybe you need to email him. I will ask if he is willing to send them to you.
I also asked him as to where Duanne from FIM went. I said that someone on the list is still waiting for his ST2 ecu! Anyway it seems that Duanne is moving house and may be back on line in the future.
All in all so far very impressed with the service.
"Brad the Bike Boy" http://www.bikeboy.org/index.html

check out http://www.paolopirozzi.com/it/

[higgy]

http://cgi.ebay.com/ducati-paso-750-198 ... 3cb173950c

Thank you Nigel

[Finnpaso]

I will never see anymore my ST4S ECU what was send to him(Duanne/FIM) few years ago, as it failed....

[Tamburinifan]

The 907 FIM chip I´ve seen has only altered fuel map, w ign nothings done.

When I compare that chips map to my mapping w MyECU, it has too much fuel (a little better than original 023) & ignition at small TPS/low RPM & no offset map whatsover. It is 0. 907 needs an offset map, as most ie Ducs.
And there is better RPM & TPS breaks to use than original.
Probably leads to the infamous 3-4k RPM stumble.
Not much help but maybe an explanation.

A little starting trick is:
Press button only a second w no idle lever, wait 20 secs. Try again w as much lever as it likes, you`ll find out.
Sorta little flooding/shower procedure.

Fuel filter & injectors are clean?

[higgy]

A little starting trick is:
Press button only a second w no idle lever, wait 20 secs. Try again w as much lever as it likes, you`ll find out.
Sorta little flooding/shower procedure.

Since adding the Motolectric kit to my 907 I no longer need to play with the throttle to get it to start. It has started every single time with nothing more than the fast idle lever

[Finnpaso]

??? That "fast speed idle lever" (same as in 750 Paso => "choke" lever) makes just same thing as open little throttle with grip handle...... Sorry, if i missed something very important now.... In carb. engine that lever makes more rich fuel mixture and maybe some more to engine, but in 907 injection engine it just same, as open little throttle grip with hand....

Or did You Higgy mean that "twist some times throttle" before start? Such function with carburated engines, but not with injected. I dont know EXACT what u mean now, sorry.

BTW (ByTheWay), if engine is injected and throttle grip(or that "fast speed idle lever") is opened little BEFORE hit to start button, then engine turns much easier as inlets are open little and that helps alot to turn engine enough to start it easier.... Did anybody understood? You, Higgy (my poor english)?

[higgy]

Yes Antti,You are on the right track

Before the wiring upgrade it was required to twist the throttle a little to get it to start. Some times more sometimes less but alway I had to twist the throttle to get it going and of course sometimes it did not matter what you did it was not going to start. Did not matter what you did with the fast idle lever. Now it starts ever time with just the fast idle for a few minutes till it warms up enough to run with out it.

[persempre907]

A little starting trick is:
Press button only a second w no idle lever, wait 20 secs. Try again w as much lever as it likes, you`ll find out.
Sorta little flooding/shower procedure.

It's the right procedure for me, too.

BTW (ByTheWay)

Are you starting with shortened words, too?
ROFTLMAO

Ciao

[blazing928]

So an undate on my 'chip' saga

When I got the bike back after a tune, BBB [Brad the Bike Boy.org] couldn' t read my FIM BSB 00 chip.
I replaced it with the other one from my restoration project , which is a BSP 03.
The last two numbers refer to that the chip is 3% richer on all settings.

This chip worked better, the bike started pretty well a few turns and then some fast idle.

BBB reckons that you should always start the bike without fast idle and then move it after a few turns.
He says that if you open it before starting, then the P7 can get confused and shut off the fuel.
I don't know why it would be any different to turning the throttle.

Anyway , the bike still was hunting up and down on part / light throttle, so he said richen the trimmer by 1.5 turns [anticlockwise].
Remember that I had all settings [valves, TPS, butterflies, mixture] put back to factory setting, so the trimmer was set at 2volts, or middle setting between rich and lean. I think this was about 3% CO2.

So again better, still some shunting and popping but pretty good , and far better than what it was before it went in for servive.

In the mean time I ordered a Ferraci chip. Staintunes, Dyna coils, NGK Iridium, as the mods.

I had hoped for it to arrive before my trip, The Snowy Ride, 2500km , tour, but of course it arrived the day after I got home It took a month to get here.

So I had a ride with this new chip today. I reset the trimmer back to its mid position.

Well all I can say is WOW!! and again WOW.
Finally the 907 goes like how I imagined it should go. Now that may not make sense, and often I don't, but its like someone put a different motor in there.
Perfect start, easy slow idle from cold, with only a little fast idle adjust.
So much smoother off idle when pulling away, doesn't feel like it would ever stall.
Much smoother, the exhaust is quieter, smoother, nicer sounding too. It feels like its finally ignition timing correctly. Before the thump thump always felt a bit wrong to me.

With no previous Ducati experience I was starting to think this was normal, and was wonderig why this was acceptable! Really I thought surely this can't be as good as it gets.

You know when a engine is really sweet, it all feels like its smooth and working together, well now it is. I could only get up to 100kmh on the freeway and again it felt sweet.

So in general a huge gain in ride abilitly. smoother, less vibration, better pick up from low revs [2000rpm] with less vibration, almost perfect light throttle, very minimal shunting or hunting on part throttle at say 40 -50kmh.

How I wish it had arrived before the trip![story coming...]

Now before I put it in I went to BBB and got him to read its code! [for higgy!]

Mixture; very similar to the standard and FIM chip at higher revs. leaner at start up, richer in the midrange.

Ignition; a lot more advanced at low revs [12 degress] and start up. Similar at higher revs.

To sum up; for MY bike its been a brilliant cure for my fuelling and ignition problems. The bike is transformed. I would now like to know if this is what all yours are like? Sadly not going to happen, so i will have to ride some others!

[higgy]

Almost every single Ducati you see around here has some Ferracci mod.( well except mine,I am a DIY kinda guy) It's been that way for many years They do know what they are doing

http://www.ferracci.com/

[907pasonut]

Well all I can say is WOW!! and again WOW.
Finally the 907 goes like how I imagined it should go. Now that may not make sense, and often I don't, but its like someone put a different motor in there.

Done...I've ordered a stage 1 chip as well...Nigel, sounds like christmas has come early this year

[angelix]

Well all I can say is WOW!! and again WOW.
Finally the 907 goes like how I imagined it should go. Now that may not make sense, and often I don't, but its like someone put a different motor in there.

Done...I've ordered a stage 1 chip as well...Nigel, sounds like christmas has come early this year

the FBF chip was the very first thing I put on my 907ie, together with a K&N filter and open cans.

After I put back on the OEM cans (to keep police away from my bike...) and never looked back since.

I was told that the Ferracci was not far away from the oem chip, only differenxe was richer, but I never actually managed to compare both side by side (I still have my OEM chip); I did noticed that the limiter is set much higher, my 907 revvs well over 10K rpm!

[persempre907]

Almost every single Ducati you see around here has some Ferracci mod.( well except mine,I am a DIY kinda guy) It's been that way for many years They do know what they are doing

http://www.ferracci.com/

Not here in Italy, as far as I know.

my 907 revvs well over 10K rpm!

Is it worth to come up to 10k rpm????

I think there are very few HPs at those revvs.
Ciao

[angelix]

my 907 revvs well over 10K rpm!

Is it worth to come up to 10k rpm????

I think there are very few HPs at those revvs.
Ciao

absolutely not!

Usually I keep it under 9000, sometimes if I need I go a little above, but only if I really need to keep a particular gear in.

[Finnpaso]

Sometimes it goes to 9000-10000 RPM, so what???? You have DESMO system, so no ANY need to worry !!!! More RPM=> more clear engine for valve adjustments, what is just good thing! ....