[fuzion]

Hello all

I have this issue lately, as i am in 2-3-4th gear accelerating hard, at around 9k the revs stop increasing... releasing throttle and again doesn't help it still stops there. only at second gear it manages to pass 10k but really hard. at lower rpm there is no power loss. its like there is a rev limiter.

it doesn't also do it all the times. i thought it was bad gas and used some 100 octane and thought it was fixed but it does it again randomly, but i have to switch on and off the bike to change situation.

I recently installed full termis with ecu and had tps reset and co set etc. could it be a fuel filter or something easy?

 

[Tchase]

Sounds like you are hitting the rev limiter are you getting lights when you feel it cut?

 

[fuzion]

no no... not even the first light comes up. as i said its around 9k, and the behaviour isn't like limiter's cutting, its like i keep the gas steady at 9.

i am suspecting the fuel filter and i will change it (its been 10k kms) but i asked if it could be something else not allowing power, electronic or anything

edit: by the way we re talking about a 2007 1098s

 

[tye1138]

Yep, I agree… try fuel filter first.

 

[pat1098]

Certainly do the fuel filter first. Where they have a recommended interval for replacement, it only takes one load of dirty fuel to affect them.

And replace the one-use hose clamps with worm-type ones, or you risk losing a hose, which stops your bike dead!

 

[fuzion]

hello thanks for the reply.

i am in the process of changing the fuel filter and cleaning the small net on the pump entrance, i have it all disassembled now. though searching for the fule net thing, i found this thread:

Changed my fuel filter and... - Ducati Superbikes

which is exactly what mine does without the cracling sound this guy says. seeing that, i removed the air intake etc and refitted the air filter, without noticing anything out of the ordinary or damaged. could be something loose on the throttle bodies, but i didnt go that deep.

i will put the new filter today and if its not fixed i will take it to the shop for pump measurement or further investigation. i will let you know what it was, tho i suspect the cut at 9000 comes from various reasons as safety from the ecu, and i hope its just the filter because i am starting to be fed up with these stuff 2 years now this thing doesnt run for 1000km without asking for something. cheers

 

[Shazaam!]

The crankshaft rotation sensor is located near the water pump where the alternator leads come out of the casing. It's shimmed out to a specified clearance from the flywheel. If the gap is incorrect or fluctuates due to a loose flywheel or cracked engine casing the rpm signal will be erratic.

A too-large sensor gap usually results in a cut-out at high rpm similar to hitting the rev limiter. This is usually accompanied by the tach readout simultaneously dropping to zero.

 

[tye1138]

i hope its just the filter because i am starting to be fed up with these stuff 2 years now this thing doesnt run for 1000km without asking for something. cheers

Ya gotta remember, this is an Italian bike, made by Italian's FOR Italian's. They do all of their development in Italy and only when a product is finished, ready for production, do they start going on longer mileage-based reliability rides. So they're riding in warm conditions, they're probably not doing much if any testing in the wet and likewise, they're not developed for ALL climates. You will find, most people who have problems with vehicles, tend to have dramatic climate changes wherever the vehicle resides. Its those temp changes, along with other ancillary things like letting the vehicle sit for long periods of time with gas sitting in the tank, which causes the problems over the long haul.

Live in a climate like Bologna and ride the bike every day, the issues become nonexistent.

I too hope its the filter, its a common problem and it fits the symptom's.

 

[fuzion]

thanks everyone, i will check the sensor as well.

as for the climate i am in greece right next to italy and i ride it often. it doesnt sit fir more than 4 days. the roads here suck so that causes many problems as well (for example the right suspension boot started leaking - not the seal, the bottom part - right after i changed oil and seals !!!).

anyway. i like it too much to sell it tho so i am just patient

 

[fuzion]

well! i got lucky.

put the new fuel filter in, cleaned the lower net, the bike again pulls like a train and up to the limiter! it feels stronger in midrange too. problem solved, happy rider :friday: