Ducati Multistretta 1098S

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millemille
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Re: Ducati Multistretta 1098S

Post by millemille »

MOT passed with flying colours.

Came home, taxed it and went out to put some miles on it and took the opportunity to visit some of the people who have been instrumental in completing the bike and without which it wouldn't have been possible...

Nelly at Cornerspeed Ducati in Sutton in Ashfield built the engine, supplied all the Ducati parts and has been an invaluable source of advice and knowledge over the last 4 years ...

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Martin at F1 Metal Fabrications in Staveley took a random collection of aluminium panels and managed to turn them into the work of wonder that is the fuel tank...

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Put about 100 miles on it. Few snags to fix but nothing major, all of them can be done tomorrow morning and then some more miles on tomorrow afternoon visiting other folks who made it all possible.

4 years work and have achieved exactly what I set out to do.

Happy. Celebratory take away and bottle of wine now.
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Re: Ducati Multistretta 1098S

Post by Skub »

A factory looking special and a true one off. I hope it rides sweet.

Give yourself a pat on the back and cheers for the highly entertaining writeup. 8-)
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Re: Ducati Multistretta 1098S

Post by KungFooBob »

How difficult was it to insure, did you have to use a specialist?
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Re: Ducati Multistretta 1098S

Post by millemille »

KungFooBob wrote: Wed Apr 14, 2021 7:03 pm How difficult was it to insure, did you have to use a specialist?
Bikesure. No issues whatsoever. Went through all the modifications and they came back with a quote pretty much straight away which was very reasonable.
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Re: Ducati Multistretta 1098S

Post by KungFooBob »

Good stuff, is it insured for a fixed value, how on earth would you value it anyway?
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Re: Ducati Multistretta 1098S

Post by millemille »

KungFooBob wrote: Wed Apr 14, 2021 7:14 pm Good stuff, is it insured for a fixed value, how on earth would you value it anyway?
It's insured for a value representative of what it would cost if someone were to be paid to do all the work I did on top of the work I paid for this time round.
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Re: Ducati Multistretta 1098S

Post by millemille »

Yesterday's ride revealed, in no particular order, a lack of weight over the front wheel meaning handling was a little sketchy and didn't inspire confidence, the gear lever was too low so my boot kept on catching it as I tried to hook underneath it causing the quickshifter to chime in when not wanted and the pillion seat pad kept on making a bid for freedom.

The lack of weight over the front wasn't unexpected; I was concerned, during the build, about the clearance between the front wheel and the radiator when the forks were fully compressed so I'd lifted the whole bike up to be taller than it was before. There was no evidence from yesterdays ride of the tyre rubbing under full compression so the forks were pulled up 2 rings - about 8mm - in the yokes.

Gear lever adjusted and the pillion seat lock mechanism was lubricated and adjusted.

Took the bike out for a spin this afternoon and immediately handling was much, much better. Not as good as before, as far as I can remember, so was planning on pulling the forks up another ring. Gear lever was now in the right position and the pillion seat was resolutely staying in place.

Started giving the throttle a bit more of a workout, still nowhere wide open, but enough to develop a Pavlovian reaction that when the throttle is opened my right foot mashes the back brake pedal down to keep the front end down. That's going to be very confusing if anyone follows me, as I rapidly accelerate away from them with the brake light glowing.

The quickshifter is awesome and changes are so smooth and seamless it's difficult to tell sometimes if it's actually gone up a gear. I think a gear indicator might be a wise move, Healtech make one and if it's good as their quickshifter I'll be getting one.

So popped over to Mansfield to see the chaps at Vale Paints who did all the power coating, painting and hydro dipping...

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...stopped on the way home to fill up to the brim with Esso's finest 99 RON fuel, and see what kind of fuel consumption I'm getting (130 miles from 16 litres. But the engine's running a bit too cool for my liking, not getting much over 60 degrees, which means the coolant trim table in the ECU will be richening up the fuelling and knackering the mpg. On the to do list is to make up a blanking plate to go over a portion of the radiator and encourage it to run warmer in cooler conditions).

A mile or so up the road an unpleasant noise and vibration started coming from the engine, akin to the noise a large bearing devoid of grease would make if it was being spun. Limped it to Cornerspeed as I was in the vicinity and initial diagnosis - based on Nelly's experience with 1098 engines - is a knackered main bearing.

1098's don't have a tip over switch and it is common for a bike that has been on its side in a crash to keep on running and suffer from oil starvation and damage the main bearings. Takes a little while for the damage to get bad enough to be heard.

My engine came from a Cat D write off so it's pretty likely it had been on its side and running.

Had to leave the bike at Cornerspeed as my van is in the bodyshop after a little prang a few weeks ago, once the van's back I'll go and reclaim the Ducati and investigate all the other possible causes (starter gears, water pump, flywheel etc.) before having to commit to getting the engine out and stripped down.

While I was waiting for Helen to spin over in the Smart car to pick me up I started to apply some man thinking and maths to the situation and, if the engine has to be opened up to change the bearings, how I might as well get the crank lightened and balanced and chuck some lighter rods in as well so that the rev limit can be raised and 170 bhp can be achieved.

But that's being ridiculous, given I'm nowhere near using the current power.

I will take the opportunity to wire in a tip over switch to prevent any main bearing damage post crash in future.
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Re: Ducati Multistretta 1098S

Post by weeksy »

Oh that's a shitter of a shame fella. You appear to be taking it in your stride though!
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Re: Ducati Multistretta 1098S

Post by millemille »

weeksy wrote: Thu Apr 15, 2021 9:28 pm Oh that's a shitter of a shame fella. You appear to be taking it in your stride though!
No other option is there?
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Re: Ducati Multistretta 1098S

Post by Tricky »

Arse- that's a bummer and not part of the plan, but all part of life's rich tapestry I suppose.

And looking on the bright side ( and from a purely selfish perspective :D ) means more interesting stuff for an already great thread :thumbup:
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Re: Ducati Multistretta 1098S

Post by Skub »

I'm loving the positive perspective. The rumbling main doesn't matter,it's just a good reason to improve things while in there. Rude not to really. 8-)
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Re: Ducati Multistretta 1098S

Post by Bigyin »

I might be wrong but hasnt there been a known possibility of main bearing failure on the Testastretta engines as i remember seeing threads on 2010-2014 Multistrada owners forums and also posts on 1098/1198 parts of the forum of main bearing failures on a few engines.

Looking forward to the solution and possible improvements :thumbup:
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Re: Ducati Multistretta 1098S

Post by Dodgy69 »

On a positive note, I think it looks bloody great. 👍
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Re: Ducati Multistretta 1098S

Post by Couchy »

Getting the mains done was an essential on the early 1098 motors if any track use was involved. But yeah time for more work too 🤣🤣👍
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Re: Ducati Multistretta 1098S

Post by millemille »

Well, I may have dodged a bullet with the engine....

Got the bike back yesterday, disappointingly leaving it sat at Cornerspeed for a week hadn't resulted in the noise disappearing, so I started looking at the limited number of things it could be if it wasn't the main bearings. Had the water pump cover off and everything looked and felt ok in there so on to the flywheel and starter gears next...

...to get the alternator cover off there's a cover over the end of the crankshaft that you take off and fit a jacking tool to pull the cover off, overcoming the magnetic force in the flywheel and alternator. I took the cover off in preparation for fitting the jacking tool and was faced with this...

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There's a bearing in the cover that slips over the end of the crankshaft and acts as an outrigger bearing to support the flywheel. It's not a particularly big or heavy duty bearing; a deep groove ball type with a composite cage and the balls are only 3 or 4mm diameter. And it's totally disintegrated.

There's no play whatsoever in the crankshaft, had my DTi on it and couldn't get a squeak out of it, so I'm hoping that it's just a simple failure of the outrigger bearing that's not due to the main bearings failing and letting the crank flail around.
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Re: Ducati Multistretta 1098S

Post by weeksy »

Easy to get hold of new ones?
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Re: Ducati Multistretta 1098S

Post by millemille »

weeksy wrote: Sat Apr 24, 2021 3:28 pm Easy to get hold of new ones?
Yep, Ducati or possibly a bearing factors...
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Re: Ducati Multistretta 1098S

Post by millemille »

weeksy wrote: Sat Apr 24, 2021 3:28 pm Easy to get hold of new ones?
Less than a fiver from the bearing factors over the road from my factory. And that's a jenuwine SKF....
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Re: Ducati Multistretta 1098S

Post by millemille »

Potter wrote: Sun Apr 25, 2021 8:45 am And has that made the noise go away now?
The engine is still in bits, even more bits than yesterday in fact, as I'm checking that no detritus from the bearing has got anywhere it shouldn't have and also that there's no other issues lurking.

The bearing detritus has damaged the alternator, scalping it where the debris was magnetised and stuck to the inside of the flywheel and has skimmed the outer face of the windings...

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I've also found out why I was having problems with the clutch and pulling away cleanly...

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So, new alternator and clutch basket needed along with some seals and a few other bits and pieces.
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Re: Ducati Multistretta 1098S

Post by Mr. Dazzle »

Potter wrote: Mon Apr 26, 2021 2:50 am .
Hopefully once that's all sorted you'll be good for a while, this bike has certainly demanded it's pound of flesh.

I'm gonna go out on a limb here and say mille enjoys fixing this stuff :D

At least you're not also dealing with 30 years of corrosion and gunk!