3000 RPM Hiccup

Shelboss · Post by **Shelboss** » Fri Sep 29, 2006 6:10 pm

My bike has a FIM chip and Two Brothers slip-on mufflers. It runs fine at higher rpm's by will miss a beat occasionally if I cruise at 3000 rpm or below. Does this motor just not like the lower rpm's or do I need to adjust the % CO level with the trim screw in the computer?

persempre907 · Post by **persempre907** » Fri Sep 29, 2006 9:26 pm

Hi Shellboss,
my bike is entirely stock and has the same issue. Principally, when it's hot.
Ciao

Finnpaso · Post by **Finnpaso** » Sat Sep 30, 2006 7:51 pm

Co trimmer in P7 ECU is meant to adjust ONLY IDLE trim(normal 1200 RPMs in Ducati), nothing over that! This 907 engine is NOT designed to DRIVE under 4000 RPMs, like same also with many Ducati engines.... I keep RPMs normally allways OVER 4000, when driving her! AND remember Guys allways give plenty of throttle and high RPMs JUST BEFORE U start to check/adjust valve clearances(adjusting with COLD engine!), cause heads MUST BE WITHOUT OF SHIT, when adjusting valves !!!!! ...one of most important things with playing with Ducati engines!

persempre907 · Post by **persempre907** » Sun Oct 01, 2006 6:01 am

Hi Antti,
are you thinking that we can have some clearance valves issue or that this is a peculiarity of 907 engine?
Ciao

Finnpaso · Post by **Finnpaso** » Mon Oct 02, 2006 12:10 pm

I started to have such "heat problems", when my valve seats went poor condition(material problems in factory with valve seats) in my 907IE. Clearanses start to be "too tight", so have to adjust valves every 5000kms...

Its fixed already with much better material in my heads.

That make such, that my bike was good, when cold, but when engine warmed, then it started to run poorly.... That seems to have been as "factory material problem" close year 1990-1991. I have heard/read, that they had plenty of such "bad heads" in that time and especially in 907 engine, not so much 906 times one year earlier.

Shelboss · Post by **Shelboss** » Mon Oct 02, 2006 6:24 pm

Thanks Francesco, yes mostly when it is hot! Antti, there is an idle adjust but also a trim pot inside the control module that adjusts the entire range. This site explains the adjustment procedure, but it requires a CO meter:
http://webpages.charter.net/strysnie/ducati/fi.html
Higher rpm's, beat on it more, check!

Finnpaso · Post by **Finnpaso** » Mon Oct 02, 2006 7:00 pm

SURELY it NEEDS CO2 meter to chack IDLE CO2 trim!!!!! ...and best way is to weld enough accurate Lambda sonds to BOTH exhaust, about 15-20cm from heads and then You can check much easier CO2 trim.... IDLE adjust is TOTALLY different thing, than IDLE CO2 trim(that small potentiometer inside P7 ECU)!

That IDLE CO2 potentiometer adjust ONLY under 2000 RPM:s, os so....

And surely there is only one way to check all points of injection system, what i have posted long time ago to this site(one Australian site..) Need to check many thing FROM TPS voltage... ... TO this IDLE CO2 trim, what is last thing to check.... ... and readjust and check again.... Not very bad job, but need some time and some cigarettes(if guy is smoking...), but can be done, if U have ACCURATE Lambdas/ good Co2 meter, Carb. balancing meters, Multimeter, etc, normal garrage things.....

persempre907 · Post by **persempre907** » Tue Oct 03, 2006 7:25 pm

Finnpaso wrote:But can be done, if U have ACCURATE Lambdas/ good Co2 meter, Carb. balancing meters, Multimeter, etc, normal garrage things.....

Hi Antti,
do you have all those things

???
Wishes!!!
Ciao

Finnpaso · Post by **Finnpaso** » Tue Oct 03, 2006 8:09 pm

Not all, but nearly and those, what i dont have, i can borrow from my close Ducati friend (some kms only :laugh: ) Most important is to know, WHAT TO DO!

Btw, i have welded to all my Ducatis those Lambda sond fittings and i have in both my Pasos LED 2 channel Co2 meters, that i can see, if some problems in front or rear sylinder. Those meters are not VERY accurate, but enough, if some "shit happens" to avoid too big mesh in engine. But when adjust fuel system, then need more accurate Co2 meter, what i can borrow from friend... Multimeter is one of MOST important things to have, when playing with "Italian electrics". I am electrician(what helps alot with Ducatis), so i have many multimeters surely

persempre907 · Post by **persempre907** » Wed Oct 04, 2006 3:11 pm

I also have at least the multimeter, but it's a 5 €. chinese thing

.
Its worth is the same of the Paso electrics (but also the classic english bikes are a nightmare)....
I think that a day I will come to you... I'll bring the beer (or the wine if you prefer it) :laugh: :laugh: :laugh: :laugh:
Have you made some electric modification on the 907? Some advice?
Ciao

Finnpaso · Post by **Finnpaso** » Wed Oct 04, 2006 7:50 pm

I have addeed only 2 extra relays to my 907IE, cause she have already from factory "good Italian electrics" :funny: , only one for low beam and one for high beam, when i put doubble round headlights to her... For my 750 Paso i have to add 4 relays to get it work, like should, one main ralay, one low beam, one high beam and one for coils. Same double headlight also in my 750 Paso with 2 x H4 bulbs.

You can come to Finland, but if You come, You have to bring PLENTY of Grappa, when You come and that Grappa MUST BE VERY GOOD quality!!!! Then we start to heat FIN SAUNA and think, what we do to Your bike.... :funny: :funny: :funny:

Ps, i accept also very good Vermuth from Italy..... But that must be sweet/white one.....

Fraser · Post by **Fraser** » Thu Oct 05, 2006 8:40 am

Antti,

What a good idea, talking Paso in sauna, providing it's hyvät löylyt. Unfortunately I'm 10,000km away, but would be happy to contribute some good NZ white wine.

Fraser.

Finnpaso · Post by **Finnpaso** » Thu Oct 05, 2006 11:38 am

Hey, Guys, i give to my Pasos "hyvät löylyt" EVERY time, i drive them in twisty roads!!!! :funny: :funny: :funny:

qldman36 · Post by **qldman36** » Thu Oct 05, 2006 2:06 pm

Just don't bring your red headed girl friend. :funny: :funny: :funny:

persempre907 · Post by **persempre907** » Thu Oct 05, 2006 2:44 pm

OK Antti

I'll come to you bringing a barrel of GRAPPA di Brunello di Montalcino :lick: :lick: :lick: :lick: :lick: .
The Vermouth don't like to me, but if you like it I'll bring too.
How much large is your sauna?
Can I bring also some girl?

Ciao