Ducati 900SS poor running

[BillyJ]

Runs VERY badly please offer advice...

Symptom are:
If left for a bit starts OK
Runs ok for a little
losses all power major misfire then chokes and dies
If you can get it started again at all you need to add choke
can only take off being really gentle on the clutch or it stalls
sometime it will rev up but with no power
Just as you transition from normal running to poor running you can open the throttle and it'll rev up with no power then suddenly all the power will kick in
after getting it to start after an episode it'll die without throttle input but more than about 5% will kill it anyway.

I think it is either not getting enough fuel or the carbs are fucked and need cleaning...
____________________
Had: '06 CBR125R + '01 GSF600 + '07 SPRINT ST 1050 + '80 CB250 RSA + '93 Ducati 900SS
Have: '13 GSXR-1000 + '01 CB500S
"The aryan confuser"

[jaffa90]

The choke / starter jets sound clear and ok but the pilot jets sound partly blocked, providing you don`t have unwanted air going in where it shoudn`t.
Revving up needs more fuel under load.
Suggest a tank / carb inspection and an in line fuel filter fitting.

[sickpup]

Does it have the carb warming kit?
How recently were the plugs changed?
Does it have a modified air box?
Might even be the coils.

Fuel is easy to check, take the pipe off the bottom of the tank and see if fuel runs out.

[BTTD]

I think you've answered your own question in that it does sound like a fuelling issue.
Have you shone a torch in the tank to see if there is any crap floating about, or if the inside of the tank has a thick layer of dried fuel varnish?
Also - answers to sickpup's questions.

Edit: The fuel varnish in the tank isn't an issue in itself, just indicative of what state the carbs might be in.

[BillyJ]

[sickpup]

[BillyJ]

Yes it has the carb warming kit.

I got a pair of the DR8ES-L to fit
Air box is 100% standard with the standard holes in the top of the box, only non standard thing is the air filter, it's a K&N as the original washable one wasn't there when I got the bike.

Will change the HT leads, the leads look ok from the outside but I don't know how old they are.


I have a feeling that the tap on the bottom of the tank wasn't fully undone.... maybe that caused the issue...

Since I have the new gaskets though, carbs will be off today and cleaned etc another day.
____________________
Had: '06 CBR125R + '01 GSF600 + '07 SPRINT ST 1050 + '80 CB250 RSA + '93 Ducati 900SS
Have: '13 GSXR-1000 + '01 CB500S
"The aryan confuser"

[sickpup]

[BillyJ]

[sickpup]

[jjdugen]

I would also do a quick charging check, then check all plugs / sockets in the ignition circuit.
____________________
The CBR900RR has been sold. Aprilia Falco worms its way into my heart.
Try Soi 23 on Amazon for a good read.... Self promotion? Moi?

[sickpup]

[BillyJ]

Alright thanks for the advice/help

[BillyJ]

Forgot to conclude this thread.

[jaffa90]

""""""""""" I adjusted the idle so it idles much better Thumbs Up """"""
Go on tell us the idle speed/revs providing it has a tacho?

[BillyJ]

About 1250 rpm what point are you going to try to prove?
____________________
Had: '06 CBR125R + '01 GSF600 + '07 SPRINT ST 1050 + '80 CB250 RSA + '93 Ducati 900SS
Have: '13 GSXR-1000 + '01 CB500S
"The aryan confuser"

[Matt B]

[P.]

[BillyJ]

[jaffa90]

Here`s the thread again,
You and Paddy and may be more on here have a lot to learn about tuning engines, idle/tickover speed has increased over the years due to the e.c. emission regulations causing very weak mixtures that normal idle speeds cannot cope, so they increase the idle speeds to try and overcome this.
The video shows a bike that can rev from 1,000rpm upwards without hesitation just like mine. Dynojet power commanders and Ivans jet kit manufacturers have made mega money to overcome e.c. regulations.
Also my bikes have never had low oil pressure and my current one shows 13.6v charging at 1,000rpm.
From the random guy who`s been there done it.
https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2060353.m570.l1313.TR0.TRC0.H0.Xpower+commanders.TRS0&_nkw=power+commanders&_sacat=0

https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2060353.m570.l1313.TR0.TRC0.H0.Xivans+jet+kit.TRS0&_nkw=ivans+jet+kit&_sacat=0
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[Matt B]

[P.]

I ride.

Nothing I ride has had 1k idle. Simple as. Go peddle your wares elsewhere.

[redeem ouzzer]

I have stuff to learn about setting up and tuning engines?

Really?


____________________
Be a REAL MAN!

[jaffa90]

Sounds like your bikes need sorting.
Fazer 1000 detuned R1. Ivans jet kit sorted it from 1,000rpm upwards.
Bandit 1200 last of the carb models fitted a denser air filter but also needed jets sorting.
KLV 1000, fuel injection bag of crap up to 3,000rpm, power commander fitted by Hobbsport racing sorted this one from 1,000rpm upwards
CBF 1000, ok would pull from 2,000rpm in top gear after slowing down, nothing needed, as many of my other bikes.

[BillyJ]