Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > Supersports: SS / SuperSport / Supersport 950 > not good noises

[Fiver]

Well, seeing as the snow has gone now and i can go places on the bike again, i rode to a meeting this afternoon.

The noise is worse.

I've had the fairing off the bike, tried it with restrictors out, checked all bolts i can see that may be loose etc - All with no joy.

I took my bike on Saturday to Veloce as Tantrum992 had suggested and they couldnt shed any light on the noise coming from my bike without being able to take it apart.
They did narrow it down to the rear cylinder tho.

The noise seems to have gotten a lot louder and is getting louder the more i ride.
So I guess its time to start taking things apart here.

It's just very bizarre what is actually rattling, as it isnt there all the time. It's very sporadic. The only constant is on decelleration and sustained revs in certain rev ranges.

I'm fightened cos its loud and sounds expensive, but have this gut feeling it will be something stupid.

I know this is kinda a long shot, but any suggestions of things to look for that may be loose or rattling?

Thanks

Cy

[ali]

If it's coming from the cylinders then it's almost certainly piston slap. The 600 has very short piston skirts, so short I asked four seperate mechanics what the bloody noise was before letting it go and just sodding riding the thing!

On the downside it did expire into a ball of flame at brands hatch about six months later I have a feeling that was more to do with being revved to 110% for every second of the race though!

Cheers,

Ali

[Fiver]

hrm flames arent ever good hahaha

Im guessing that aside from replacing/upgrading the pistons there is nothing i can do to prevent piston slap?

Theres no fuel additives or anything i can use to help reduce it?

long shot i know...

Cheers

Cy

[Zimbo]

Check that the nut holding the cam pulley on hasn't come loose. Unlikely, but it can happen and happened to me once. Easy to check - just whip off the belt covers.

[ali]

Originally posted by Fiver

Im guessing that aside from replacing/upgrading the pistons there is nothing i can do to prevent piston slap?

Cy

Even replacing the pistons won't do a thing. Mine slapped like a drunk sumo with brand new pistons in. The skirts will be the same length regardless.

The best option by far is to get a cheap 900 engine and bung that in.

[Fiver]

Well im about to tear it apart to investigate.

I just rode to town, and it stalled twice enroute at junctions, with a sudden "click" as it stalled both times.
It is also sounding like a bag of nails when you rev it in any kinda heavy handed way.

Time to investigate.

*grumble*
Cy

[Fiver]

Found it!

The top pulley on the front cylinder is wobbly as hell.

[philthy]

Veloce were only one cylinder out then

[Fiver]

http://scoot.net/gallery/bbs/wheel.mov

I noticed that the camshaft it sits on can turn by about 1mm, is this just down to the valves needing adjusting? or cos the belt is slacker cos of the wheel being on the skew?
The camshaft itself isnt loose, so im presuming its the wheel or woodruff key that is knackered, it just worries me what damage has been done inside to the valves.

No wonder it souded like a bag of nails when it was running.

Also, im not bad with spanners, but is this something i can do myself? or should i put it in to the shop to do?

Im *really* not flush enough at the moment to be paying out £40 odd quid an hour at the moment for repairs.


Thanks

Cy

[Fiver]

bumpity