Temperamental Ducati ! Rough running issue

[Mr Moofo]

The Diavel has been unused for a while - but full of fresh fuel as I was meant to be on track day a few weeks ago. When I went to fill up with fuel it felt like to was "hunting" slightly - but I put that down to cold/ not run/ Ducati character.

Went to use it on Thursday - stated it up - and it sounded like was mis-firing. Allowed it to warm up a bit, gave it a bit of throttle as everyone know that is the way to sort this sort of stuff out. It bogged down and stalled. Started it up again ( no problem) and now it starts detonating un burnt fuel in exhaust with a very loud "pop"- rocking the exhaust as it does. And then it does so with enough force to blow the 2-1 connecting pipe apart (the spring meant it stayed in roughly in place - but needed a bit of help in getting the two inlets to match up again ( but this just may be how they are - and nothing to do with the large bang!)).

Exhaust is now back in situ - but tried to stat the bike today. Again , ran fine until the engine gets to 45 degrees C, then starts to misfire slightly. By 50 degrees C it starts the popping sound of unbent fuel in the exhaust.
Both cylinders are firing - both heads are getting hot
There is a strong smell of fuel when it is running
The Ducati FB site suggests air pressure sensor failure - but I have already had that , and they were replaced about 18 months ago. And it was ridable (just) with that issue. This is worse.

Any ideas ?

[Skub]

I'm a great believer in trying the simple stuff first.

My old 10R had a similar problem which turned out to be a spark plug breaking down.

The word 'simple' may not be the right word here,since the plugs were a major ballache to access and replace,I dunno about the Duc.

[Mr Moofo]

TBH , neither do I. I guess I am going to find out

[ogri]

Ducati, you have my condolences, but as said, try the plug caps fist you may be surprised, if not change the plugs again

[636mick]

Has it got the flap in the exhaust like a Multistrada? I had similar when the flap had stuck, overfuelling etc. There is a fix, google it if it is the same.
Mick

[Mr Moofo]

Has it got the flap in the exhaust like a Multistrada? I had similar when the flap had stuck, overfuelling etc. There is a fix, google it if it is the same.
Mick

It does have one of those ..
And I am going to now have a look

[636mick]

Good luck. I removed mine, there’s various ways to do it. Hope it helps to sort it.
Mick

[Mr Moofo]

Mick - it is not the exhaust value - that is working as it should. A quick talk with ProTwins suggests it is likely to be the plugs - so now I have to find out how easy that is to do myself!

[636mick]

Mmm, never changed mine so can’t give any advice. When I changed all the battery cables on my Multi it involved removing the tank and a lot of the bodywork plus a few other bits. I do recall that this would have made it easy to get at most engine bits. But that was a Multi, not sure if that helps or not.
Mick

[DefTrap]

Anecdote: I bough a 'dead' Ducati monster (mechanically clueless student owned it - local yam shop wouldn't touch it). I pushed it home and changed the plugs and it was fine. It still annoys me that I didn't change the plugs -before- pushing it home but I stupidly assumed the PO would have tried that.

Yeah I'd try plugs first too. It doesn't sound particularly electrical but it doesn't do any harm to check that out next.

[Mr Moofo]

Doing the front plug doesn't seem so difficult.
Access for the rear means removing all the tank bodywork, the instrument clusters etc and having dexterous hands in small places.

Still looks like ProTwins or Moto Rapido get the gig ...

[weeksy]

Doing the front plug doesn't seem so difficult.
Access for the rear means removing all the tank bodywork, the instrument clusters etc and having dexterous hands in small places.

Still looks like ProTwins or Moto Rapido get the gig ...

You could try Snells, a mate of mine and Crusts is the head mechanic there. I'm sure Crust would put in a good word for you if you ask him nicely.

[KungFooBob]

If it's a 2nd Gen one it'll have four plugs!

[millemille]

Doing the front plug doesn't seem so difficult.
Access for the rear means removing all the tank bodywork, the instrument clusters etc and having dexterous hands in small places.

Still looks like ProTwins or Moto Rapido get the gig ...

I wouldn't give Pro Twins the steam off my piss, terrible bunch of shysters.

Moto Rapido are a pretty good bunch of guys, not the best there is but not bad.

[Mr Moofo]

Doing the front plug doesn't seem so difficult.
Access for the rear means removing all the tank bodywork, the instrument clusters etc and having dexterous hands in small places.

Still looks like ProTwins or Moto Rapido get the gig ...

I wouldn't give Pro Twins the steam off my piss, terrible bunch of shysters.

Moto Rapido are a pretty good bunch of guys, not the best there is but not bad.

Can you PM me with you reasoning?
Thanks

[millemille]

Doing the front plug doesn't seem so difficult.
Access for the rear means removing all the tank bodywork, the instrument clusters etc and having dexterous hands in small places.

Still looks like ProTwins or Moto Rapido get the gig ...

I wouldn't give Pro Twins the steam off my piss, terrible bunch of shysters.

Moto Rapido are a pretty good bunch of guys, not the best there is but not bad.

Can you PM me with you reasoning?
Thanks

There's nothing I'd say in a PM that I'd not say on a forum. A few years ago my wife had a monster and because she was still on a restricted license the monster needed it's power capping. Pro twins were just down the road from us and they advertised that they fitted a brand (can't remember the name) of inlet restrictor that was certified to give 33bhp for whatever model you had.

Gave Pro Twins the bike and they handed it back with a throttle that hung open and they couldn't have given two fucks about the fact it almost killed my wife on the way home when the throttle stuck open and took her into oncoming traffic. Said it wasn't their problem and we should take it up with the restrictor kit manufacturer....

Basically, if you want tacky bling shit bolted to your bike they're your man.

Moto Rapido are good guys, they let themselves down slightly with a family member's Multistrada 1000 when it was having running problems and he asked Moto Rapido to look at it and they couldn't find anything wrong. I suggested taking the bike to Nelly and he had a pretty good idea what it was - valve seat recession, a common problem on early 1000DS engines - just from the description and it took him an hour or so to confirm it.

[Bigyin]

The Ducati FB site suggests air pressure sensor failure - but I have already had that , and they were replaced about 18 months ago. And it was ridable (just) with that issue. This is worse.

Any ideas ?

I would have suggested the air sensor as well but they tend to drop in and out intermittent when they start to go wrong as mine did. Over fuels and stalls followed by popping and banging to get rid of the unburnt fuel although when mine went it was nowhere near as violent or as bad as you described

Wont be the exhaust valve as that just strangles the engine when you try to rev it over 5K and wouldnt give the banging you are experiencing.

The rear plug change is possible (so i am told) but requires a lot of stripping down and a jeremy beadle sized hand to get the bastard things in and out ....or proper tools and experience

[Mr Moofo]

I wouldn't give Pro Twins the steam off my piss, terrible bunch of shysters.

Moto Rapido are a pretty good bunch of guys, not the best there is but not bad.

Can you PM me with you reasoning?
Thanks

Moto Rapido are good guys, they let themselves down slightly with a family member's Multistrada 1000 when it was having running problems and he asked Moto Rapido to look at it and they couldn't find anything wrong. I suggested taking the bike to Nelly and he had a pretty good idea what it was - valve seat recession, a common problem on early 1000DS engines - just from the description and it took him an hour or so to confirm it.

Pro Twins have always been good to me - but did miss a fairly big issue re a melted ABS sensor on the back wheel. Moto Rapido found it ( fair do’s) and serviced the bike - but had run roughly ever since ( though they say nothing wrong , all Ducati’s run like that under 3.5K revs when I took it back to them). And they chipped the paint on the tank.

Just talked with them ( it has taken three days to get a return phone call - they can look at it but it will be the end of August. I feel I am not strictly on their “wanted” customer list. They may not have their head up their arses but they do seem to be able to give that impression.

They however did give me some pointers - so I guess I will try and do it myself as per BiG Yin they are saying pressure sensors would be their suggestion.

Looks like I will be learning to take the tank off. Are they self sealing re petrol coming out?

[Bigyin]

Pro Twins have always been good to me - but did miss a fairly big issue re a melted ABS sensor on the back wheel. Moto Rapido found it ( fair do’s) and serviced the bike - but had run roughly ever since ( though they say nothing wrong , all Ducati’s run like that under 3.5K revs when I took it back to them). And they chipped the paint on the tank.

Just talked with them ( it has taken three days to get a return phone call - they can look at it but it will be the end of August. I feel I am not strictly on their “wanted” customer list. They may not have their head up their arses but they do seem to be able to give that impression.

They however did give me some pointers - so I guess I will try and do it myself as per BiG Yin they are saying pressure sensors would be their suggestion.

Looks like I will be learning to take the tank off. Are they self sealing re petrol coming out?

Sorry i cant be more help as never taken mine apart ....... i use a local Italian independent specialist and getting my Multi in for its 15000 mile major service is Sept at the earliest

I did speak to him late May and he said maybe july, but as i wasted a whole 10 days before booking it in June it then went from July to Sept as the entire world brought out their Ducati sports bikes that had been locked up for a year and a half and wanted them serviced so i shit out

You might already be on here but its worth a look and search

https://www.ducatiforum.co.uk/forums/

[Mr Moofo]

There don’t seem to be any of those around here - hence the dealer choice. Mind you , I am even thinking of going to P&H!
As you say the good weather has arrived and all bikes are getting serviced / sorted/ mended …