Ducati Multistretta 1098S

[Mr. Dazzle]

Drive in freezer FTW. That's what we used.

[Horse]

The bigger issue is making sure we get rid off all the petrol fumes

Sure I heard / read the suggestion of a lump of dry ice (although where you would get it from, I have no idea), as it warms and turns to [heavier than air] gas it fills the tank and pushes the petrol fumes up and out.

[Mr. Dazzle]

You can buy dry ice on the Internet and get it in the post.

Filling the tank with water would probably achieve the the same thing but then you need to dry it.

[crust]

Hot soapy water, rinse and repeat a half dozen times, fill 80% with cold water, plastic bag over filler cap and close it (keeps the water in when you turn it over to weld).

Done this when repairing early Ducati Monster tanks that have a tendency to break their welds at the pivot bracket.

[millemille]

So, not a lot to report in the way of progress. Been too busy mountain biking and stressing about work to give much thought to the Ducati and the woes that ail it, however I have plans for next summer that have seen the needle of the mojo meter start twitching.

Me and the waife are off to that there France and their Alps avec @porter_jamie and his better half for a week of mountain biking at the end of July. It just so happens that World Ducati Week is taking place at Misano the weekend that we had been planning on driving down to Borg to start our holiday.

The idea is that bicycles and bicycle related luggage will go in my van which will get driven down to Borg - driven by persons yet to be decided - and I'll ride the Multi down to Misano, with the self loading baggage on the back, over a three days - stopping at regular intervals to eat all of the cheese and drink most of the wine that France and Italy has to offer - and spend a couple of days at WDW and then ride back to Borg.

Spend the week throwing myself down various mountains on a bicycle and eating the rest of the cheese and fighting the wife for the dregs of the remaining wine. Then a blast home on the Multi at the end of the week.

So I've got 8 months to get the bike fixed and reliable and presentable and convince the wife it isn't going to break down and strand us somewhere foreign.

I'm also keeping a weather eye on what Felix at 2moto is up to with his 999/109 hybrid as he's just ordered one of these...

https://www.gripone.com/#gref

..and I wouldn't mind traction control and anti-wheelie for the Multi as the back brake was getting a work out when ever I gave it the berries.

[weeksy]

thread resurrection !

[weeksy]

So, not a lot to report in the way of progress. Been too busy mountain biking and stressing about work to give much thought to the Ducati and the woes that ail it, however I have plans for next summer that have seen the needle of the mojo meter start twitching.

Me and the waife are off to that there France and their Alps avec @porter_jamie and his better half for a week of mountain biking at the end of July. It just so happens that World Ducati Week is taking place at Misano the weekend that we had been planning on driving down to Borg to start our holiday.

The idea is that bicycles and bicycle related luggage will go in my van which will get driven down to Borg - driven by persons yet to be decided - and I'll ride the Multi down to Misano, with the self loading baggage on the back, over a three days - stopping at regular intervals to eat all of the cheese and drink most of the wine that France and Italy has to offer - and spend a couple of days at WDW and then ride back to Borg.

Spend the week throwing myself down various mountains on a bicycle and eating the rest of the cheese and fighting the wife for the dregs of the remaining wine. Then a blast home on the Multi at the end of the week.

So I've got 8 months to get the bike fixed and reliable and presentable and convince the wife it isn't going to break down and strand us somewhere foreign.

I'm also keeping a weather eye on what Felix at 2moto is up to with his 999/109 hybrid as he's just ordered one of these...

https://www.gripone.com/#gref

..and I wouldn't mind traction control and anti-wheelie for the Multi as the back brake was getting a work out when ever I gave it the berries.

That sounds EPIC !! I must admit i've got a hankering for WDW or Tavullia or even just cruising to Italy with a few mates.... It's something on the 'not too distant future' type list for me, but won't be next year as too many plans already.

[porter_jamie]

i havent been to the alps for a couple of years and i'm itching to get out there again. the accomodation in the summer is really cheap - for example i have rented a 10 bed place for a week which was 200m from the lifts for 900 euros. so divided by 8 or so of you its nothing. i think things have gone up a bit since but the staying there is not expensive. its getting there is the killer. sod flying, sticking many bikes in a van is the best way imo, you get a road trip down there and you can take all your spares and things that you can cram in. the tunnel is a bit spicey price wise these days too, but divided by 4 or 5 of you it isnt so bad.

[Demannu]

For welding a fuel tank, an unofficial method, but it works, is to run a pipe from an exhaust and run it up for 1/2hr.
Stick a flame over the filler, wait for the whoooommmmph! and then start welding

[weeksy]

update @millemille ?

[millemille]

update @millemille ?

Hello. Only spotted this just now, wasn't ignoring you!

Spent a day working on the tank before Christmas with my fabricator mate and that looks to be done but I've not yet offered it up to the bike.

Othe than that, not done anything. I have a list of excuses.

1. The Focus not selling and not wanting to antagonise Mrs. Millemille by spending more time and money on a project.

2. Having to clear the garage out to allow building work to happen.

3. Work and the travelling I do meaning weekends are mainly spent recovering and generally doing not a lot.

4. My car refusing to start (typical Mercedes electric steering lock woes) and needing to get that fixed.

Etc. Etc. Etc.

[millemille]

Actually, tell a lie, I forgot that I took the cracked side panel over to the paint shop for their attention a few months ago.

Really should give them a ring and see what the latest is...

[millemille]

Starts first time on the button, hot and cold. Only took new plugs, new starter sprag clutch and reverting back to the original starting map that CJS did when it was on the Dyno.

The MOSFET reg/rec has developed a fault, only putting out about 12.7 volts, which I suspect is because it's a knock off Chinese fake. So I've ordered a genuine Honda one to be sure it's the real McCoy.

Got to finish applying the gold heat shield material to the underside of the tank and stick down some of the edges already applied that don't like the shapes they are being asked to stick to.

I need to chase the body shop for the side panel, but all being well I could be on the road by the end of August.

[millemille]

Slaved in the jenyouwine Honda MOSFET reg/rec....



And..



That's more like it!

[millemille]

So, starting on the button and charging the battery. What's next?

Running too cool.

The coolant temperature trim table in the 1098 ECU software doesn't stop adding fuel to the base map until the coolant temperature is over 70°.

The multi was running around 55 to 60°, so was running rich which meant it was clagging the plugs up which
contributed to the poor starting and meant it was hosing through fuel at a rate.

The radiator I used, from an Aprilia RSV4, has a larger surface area than the OEM 1098 one. This was deliberate to ensure that if I was down in Italy or the south of France in the middle of summer, with the missus on the back and hard luggage fitted so couldn't filter, and got stuck in traffic it wouldn't overheat.

My fear was, in normal circumstances, the radiator was just too big and hence too good at cooling and the bike was running cool as a consequence.

But a mate with a stock 1098 reported similar running temperatures to the multi and Nelly says that 1098's are well known for taking an age to warm up and rarely run hot.

In doing some research on the interwebz I came across talk of an updated 1098 coolant temperature sensor housing as the original design shrouded the sensor so it didn't see actual circulating coolant temperature and the bike appeared to be running cool when it wasn't.

I checked with Nelly and, while he had never heard of this issue, he confirmed that the coolant sensor housing part number had been superseded with a new one. So a new one was ordered.

The coolant temperature sensor sits in a union on the side of the front cylinder.



The original one, on the right in the photo below, is made from plastic with metal inserts and the new one is all metal..



And sure enough, when you compare the inside of the housing it is clear to see that the new housing has been heavily relieved around the sensor tip.

New.



Old.



Swapped the housings and ran the bike up and it's definitely warming up quicker, as far as the temperature gauge showed.

It'll be very interesting to see if this fixes the problem.

If it doesn't the next step is to research interwebz factoids that suggest the KTM 390 has the same thermostat assembly as the 1098 but with a higher opening temperature....

[Taipan]

A lot of ECU remaps lower the temp that the fan kicks in fan at, and on my 690ktm i replaced the fan sensor with one that brought in the fan earlier. So if the software, or different fan sensor, can adjust the fan kick in temps, could you not do that and fit the oem rad? Would that help with a higher running temp and the safety net of the fan kicking in sooner?

[Mr. Dazzle]

Do "they" not make different temp thermostats anyway? I'd have guessed a bike with as many racing versions as the 1098 has multiple thermostat options?

[millemille]

A lot of ECU remaps lower the temp that the fan kicks in fan at, and on my 690ktm i replaced the fan sensor with one that brought in the fan earlier. So if the software, or different fan sensor, can adjust the fan kick in temps, could you not do that and fit the oem rad? Would that help with a higher running temp and the safety net of the fan kicking in sooner?

I had given the idea of an OEM radiator some thought but there's a couple of problems with that. One, the bodywork is designed and modified to work with the Aprilia radiator. So to fir the Ducati OEM rad requires a second set of bodywork. Two, when it's really hot the OEM radiator isn't up to the job. The internet abounds with stories of 1098 owners sitting in traffic in California with the fans running flat out and coolant pissing out of the overflow and the dash flashing warnings of impending mechanical doom if the engine isn't turned off.

[millemille]

Do "they" not make different temp thermostats anyway? I'd have guessed a bike with as many racing versions as the 1098 has multiple thermostat options?

Nope, all the road bikes - including the cooking versions raced in superstock - have the same thermostat part number. Your full monty race bikes don't run a thermostat.

[mangocrazy]

Is the OEM 1098 thermostat effectively a sealed unit, or is it a housing with a stat that drops in? If it's the latter you might be able to drop in a hot climate stat from a different bike. Have you checked part numbers on bikes for different geographies, such as northern Australia?