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Discussion Starter · #1 ·
Hallo guys. I am riding my Ducati Monster 400 Jubelee Edition (2000) since 2021 here in Cambodia. What came up lately is: in the morning/cold it starts practically on the 1st rev but after running for a couple of km there is 1 or 2 misfire and then it's beginning to lose power and 1km more and I end up dead at the side of the road. Waiting for 1 hour makes for difficult start, then revving fine and all the same happens again. All the components that you might usually think of got changed but to no avail.
So, is there anybody out there with similar experience and hopefully a Solution.
Many thanks to all, Richard
 

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Discussion Starter · #6 ·
Thanks to everyone getting involved.
This here (Cambodia) is a country of horror and Frankenstein is ever around the corner.
(Fuel pump, wire, air filter, plug...)
Dr. Ducstein is getting closest but this is the 3rd set of coils + 2 sets of ICU and still Frustration.
It is a thermal problem and maybe the final solution will be to instigate an accident with those ubiquitous RR, Bentley or Lamborghini.
Alternatively I'd may run it into the ditch and set it alight.
There is an underlying philosophical thought: you've got it, then dump it, and go along the lines with Frank Zappa
"I am going to Montana soon"
Simply change 2 cylinders for 2 small horses.
However this may turn out,
I enjoyed every minute of the hour.

Greetings Richard
 

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Hallo guys. I am riding my Ducati Monster 400 Jubelee Edition (2000) since 2021 here in Cambodia. What came up lately is: in the morning/cold it starts practically on the 1st rev but after running for a couple of km there is 1 or 2 misfire and then it's beginning to lose power and 1km more and I end up dead at the side of the road. Waiting for 1 hour makes for difficult start, then revving fine and all the same happens again. All the components that you might usually think of got changed but to no avail.
So, is there anybody out there with similar experience and hopefully a Solution.
Many thanks to all, Richard
Need some clean up man


Sent from my iPhone using Tapatalk
 

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Richard,
Okay, you have changed lots of parts so it is time to dig into the weeds...

I assume your bike is fuel injected (if not I will advise differently)
I assume voltage is present at the battery.

1. When the bike dies, does it have spark?
Loosen the plugs when bike is cold.
Put tools in pocket.
Ride until it quits .... get off, pull a plug/1 or 2/ and verify spark.
If sparking then let us move on to the fuel delivery system.

2. If you have an ECU, then it seems logical that your bike is fuel injected... yes?
A. Fuel Pump Relay .... is it the OEM part that is in this place?
B. Are all of the connectors on the relay matrix connector doing their job?
oh yes, I have found gremlins here on BMW fuel injected bikes ... so elusive but the same issue.
C. Is your fuel pump working and then quitting.... to test ... I assume you begin a new ride ...cold state ...
then ride for a bit and it quits ..... well... before you leave home open the fuel tank fill lid before you switch on the bike and put your ear to the hole ... then switch on and listen carefully to the cycle of noises ... then when she quits do the same ... switch off ignition and then switch on before she cools too much ... and listen ... is the pump winding up pressure in the system cycle of getting ready to run an engine or is it all quiet ....
D. When was the last time the fuel filter was changed..... perhaps the system can bleed fuel into the lines and then under power the fuel is used up and she quits ....

that is enough for now but no fuel no bang, no electrical no bang, and no air ...no bang...

we will get you there
 

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2000 model with single front disk would be carbed model, ie. Mikuni BDST 38 CV.

Everything Dr Ducstein said above,

Also, very hard to see in daylight whether the plugs are firing correctly, they may be fouled and work with rich starting but shorting to base of electrode when hot.
I have always taken along at least one new plug to swap. As Mentioned above, also, unlock the fuel cap and leave it slightly open when testing and initial ride.
Blocked fuel tank vents can cause your issue. If you open when the engine stops, maybe you can hear a 'hiss' suction sound from the cap.

Just to add, you live in Cambodia, warm tropical weather. I lived in Singapore for a few years, long time ago.
High humidity can lead to moisture which condenses into water in the tank and carbs.

If possible, drain the carbs bowls, (and maybe the tank), carbs first. Make sure to drain into a container, whatever fits. If only to check. If there is water present, it will be obvious.
Water sinks to the bottom and maybe, since jets are a little elevated it runs when cold, then mixes when riding and cuts the motor.

Any water in the sample will look like jelly like blobs at the bottom of the fuel. Also check for brown water or rust, you may need to strip the carbs for a good clean and while doing that,
drain the fuel tank and flush out all the lines.

Another issue with high compression motors, ie. 10.1 in the 400. In very hot weather, evaporation of the fuel below the tank in the fuel lines.
If Cambodia is anything like Thailand cities, Bangkok or Phuket, slow moving in traffic for a short time can cause this in carb models.
Heat gets trapped under the fuel tank, These bikes are not like low powered mopeds and the like, they get hot, carbs are mounted between the cylinders, unlike other bikes where carbs are behind.

Something to check anyway after doing the above first.

Let us know, It's only a machine, Lots of experienced Ducati owners here willing to help.
hope this helps.
 

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Nice one Ronski, I will squirrel your advice away for the days when I move my monster to Kuala Lumpur .... and treat my fuel with additives..... so the specs for a 2002 model cite 2xMikuni carburetors .... Does the bike have a vacuum operated fuel petcock .... if so it needs to be verified. Likely as Ronski points out ... a complete tank removal, petcock removal and investigation of the fuel delivery .... my old CZ Czech Jawa used to have this same sort of issue ... finally, I bored out the fuel delivery passage ways to ease the flow .....also get the specs on the mikuni .... if the floats are set too low then you can run into fuel starvation .... sit at idle and the bowls replenish and if the carba are not all nice and level as on a japanese machine then a symptom can be exacerbated .....Have a good week!
 

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Discussion Starter · #11 ·
A great many thanks to Mr. Ronsky and Dr. Ducstein.
So this is really about going into the deep, deep woods. I have a history with something around 36 bikes of every shape and make back then in Thailand.
I did more or less the same after relocating to Cambodia but then my faith was sealed when I've seen this DCM400JE 2 days prior to Christmas last year, and the rest is my current predicament.
The legal papers are telling the story that this DC was imported from Japan and 1st registered in Phnom Penh in March 2015.
I took it over in Showroom Condition, pristine, almost looking like straight out of the factory floor.
But then reality sets in and here we are, in the Kingdom of Wounder and nothing is approximately the same as it looks like,
which brings us back to the concept of Frankenstein-ism
As a primer, something to start with: the white one is the problem whereas the black sheep is technically in an unadulterated state of existence.
Let's start with the fuel system.
There are around 5 outlets at the underside of the tank. Except all but the main line are blocked. Nothing to worry bcz I give a darn sh+t on fuel gauges or any artificial information anyhow.
But then this darn tank started leaking right at the rear end, got welded and brushed up in an astonishing way, only to start leaking again 1 week later.
The fuel pump is Frankenstein in the shape and halve the size of a beer can, and initially there was NOT a filter.
Got it changed to another Frankenstein.
And this is the state of the Despair:
Fireing up at first rev.
Exhaust residues perfect.
Carburettor got cleaned
ICU and coils new but not OEM
The fuel at the carb just splurts.
So imo this boils down to an Untraceable Thermal Problem and inevitable here I am confronted with some hard choices.

Thanks much for tuning in and about the choices something more tomorrow.
 

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OMG ... I hope you are in retirement and Nirvana will be a trouble-free scoot before you depart us .... lol

We seek the shortest path between silence and vrooooom ... hmmm.... such a vintage machine in such pristine condition has my suspicions aroused already ... no viagra needed ...

Back to basics:
Air - uh this does not appear to be a breathing problem.
Power - well she fires right up and theoretically you have replaced the critical components.
Fuel - we still have unknowns here and I will add a fourth element to the fire triangle
Compression - if she heats up and loses compression this would be a problem

I remain confused .... you speak of a fuel pump and yet the engine has carburetors ... even as a mechanic for motorbikes in my past life I have not encountered this combination. Perhaps some photos could help us.

Another issue is ECU ... does this bike have an engine control unit (computer) because if it does there is one component that can mess up its operation ... that is the coil pick up that is triggered by the magnety on the flywheel. It is located on the top of the engine's left cover on my M1100. I do not know how to test it but you have a loaner bike to swap some simple parts with so there is nothing complicated in doing this ... only a time investment.

The other point I wish to drive home is an intermittent connection. Probably the hardest issue to isolate. Wiggle the wires, pull them, prod them, and note where you do this and as i previously mentioned check every multi plug with extreme scrutiny. And while we are on the topic ... think back ... when did the engine act up ... Was it after a hitting a pot hole .... or just after an predictable amount of time ....

Do a pressure test on the cylinders .... cold ... hot ... and just after it dies .... easy and cheap and you can likely borrow a tester for a six pack of beer from the local car guys...
 

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There are around 5 outlets at the underside of the tank. Except all but the main line are blocked.
One thing, two of these are vent hoses and overflow hoses for the fuel tank, they should join and vent down to beneath bike.
Covered when we said leave fuel cap slightly open for testing.
initially there was NOT a filter. Got it changed to another Frankenstein.
Another clue, I've attached a picture of line routing and fuel filter below tank, this is how it should be, I remember we had 'lot's' of issues when someone changed the filter and messed up the path of the fuel lines. This caused them to get pinched when lowering the tank and partly blocking fuel flow. you said a 'Frankenstein' filter is fitted, it's possible that it is causing this same problem. check for kinked hoses.

Automotive lighting Automotive tire Automotive design Motor vehicle Finger
 

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Discussion Starter · #14 ·
Life is good and pepper a'plenty,
so I don't mind the day I turn twenty.

As we are all struck by the desease spelled by the Italians DUCATIFACTIONE / -.. ISTA
there is no love it or leave it option, bcs it is in our veins.

So let's lean back, think of strategy and relax.
I am not willing to get entirely consumed by the beast, bcs by the end of the day its just a machine. I left Maico, Honda, Suzuki, Yamaha, House, Wife, Jaguare, Porsche's behind a numerous times. Initially sure not easy but freedom at last. Enjoy it to the Max and than leave it behind with the best of memories.
As the question came up: I had my first attempt at retirement in 1989 aged 31.
Coming off the top of the hill (Porsche Weissach Development Center) I went streight down to Changi Port. Yes Singapore.

More in a minute
.
 

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Why not set up an IV drip fuel cell on a stand, run a pipe to the carbs and put a fan across the motor and see how it runs? At least then you can watch things instead looking out for traffic etc ... perhaps something will stand out....

Hmmm, I wonder if that is the infamous Changi Straight on the back end of the test track? lol.... I am ready to throw in the towel here in USA ... getting my spare parts in order and super mods so that I can ride instead of repair ....


cheers
 

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Discussion Starter · #16 ·
The beauty of engineering lies in the ability to get down to the core, and as a logical outcome towards simplicity.
I know this are heady words but despite all of your assistance it is me who's finally got to pull the plug.
And here now comes the Yes/No/Indifferent - Decision.
 

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Discussion Starter · #17 ·
Yes sirs. We are into the real thrill and I can easily imagine that the one or other of you had a good ride around and up and down Penang.
However things may may tend to be, at the end of the day my decision came quite simple and easy.
This capricious White Lady will get bedecked by the Black Sheep.
Interracial breeding.
Eureka.
 

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Discussion Starter · #18 ·
The beauty of engineering lies in the ability to get down to the core, and as a logical outcome towards simplicity.
I know this are heady words but despite all of your assistance it is me who's finally got to pull the plug.
And here now comes the Yes/No/Indifferent - Decision.
 

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Oyy? I was looking at your fuel filter photo. From this photo I would appear to me that the fuel delivery pipe flows down and up like a drain trap. Is it possible for an airlock to form in this circuit ... for some strange reason? I would ditch the filter unless you have jungle leeches living in it. That is my arm chair wisdom for today!
 

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The beauty of engineering lies in the ability to get down to the core, and as a logical outcome towards simplicity.
I know this are heady words but despite all of your assistance it is me who's finally got to pull the plug.
And here now comes the Yes/No/Indifferent - Decision.
I am hearing it now ... from across the pond! lol ... if a Honda Cub purrs every block of the journey to the pub ... and back ... mind you .... then why bother with this Italian Macho Machine .... The machine is your horse! They shoot horses, don't they? It must serve you accordingly, else its cut your losses or reassign your relationship with it.... a worthy project to provide hobby satisfaction .... but ... IMHO i would write down a thorough plan to endorse or identify each critical system and you will find the problem ....

DDS
 
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