That's not good. My dealer said they've 'checked it out' and no fault found everything is correct. Hasn't happened again so for now I'll suffer it, I don't want to give them the bike over the summer period anyway, I'll let the fucker rub.
A quick question on the chain adjustment it's meant to be between 49/51 mm is that at the slackest point of the chain or some pressure from my finger?
Got the exact same thing on my 959. When i bought it the previous owner had put a renthal rear sprocket on, maybe to cure this i dunno cos i never noticed it until i cleaned it for the first time since buying it. I'll put some permanent marker on it and see if it still rubs. Other bikes have a piece of chain guide here.
My 959 did it and I fitted a 44t rental sprocket and now AFAM sprocket and never for it since I touched it in with black marker and you can't notice it
My chain snapped on my 1299s due to rubbing against the swing arm @7k miles! Damaged engine casing and other bits! Ducati repaired it all under warranty with new replacement engine cases (original numbers stamped at factory on new cases etc). New updated swing arm as well. All good now
This is 'new' swing arm, it's basically the same as the old one but has been machined where it used to rub. I had a upgraded zvm gold DiD chain to replace the lower spec oem one.
I've just been and checked mine now and it hasn't rubbed. Mine is a 2015 1299s with a 14T Renthal sprocket. I't can't be a wheel mis-alignment for the chain to rub at this point (the pivot point) to me it looks more like a swingarm mis-alignment issue.
It's a fairly common issue online. 1199 had the issue too. My dealer didn't seem interested. I got "we've checked and adjusted everything up". Mine hasn't rubbed again yet even after a hammering at Brands Hatch. Pretty clear from the pictures above that Ducati have machined the swinging arm to allow more space so maybe it's that the swinging arms are all a little too big.
No sign of rubbing on mine. I don't see how a steel chain rubbing sideways on an alloy swing-arm could cause the chain to snap, but what do I know?
Right, just to try to help on this thread, there are a number of possible causes, which I’ve tried to put into a logical order, relative to the age of a bike. Assuming a 525 stock chain and sprockets (ie OEM): 1. Natural, lateral play in the chain will see it float towards the bike at certain points during its rotation. If this variation hasn’t been factored into the production part clearances correctly, there’s a risk of contact at the closest part of the SSSA, near the front sprocket. This would typically lead to a warranty claim as it’s clearly the cause of Ducati, if all else measures up. 2. Beyond that, The most fundamental cause would be too much slack. If you look at the height of the rub mark relative to the chain pin height at rest, you’ll be able to see how much the chain ‘flys off’ by. On the top side of the chain there should be very low fly-off as it’s not helpful during any phase of power transmission. However, it does tell something about your riding style. By this, I mean, if you use the engine and front brake to decelerate, versus incorporating the back brake as well, you’ll get more ‘fly-off’. This is a sign of slack in the chain too, so check again and change you’re braking habits for the better. 3. On an older bike, the overall chain alignment can be affected by a few things: A) Lateral stretch - yes, the chain becomes more flexible in the L-R direction as well as stretching in the direction of travel. This lateral flex can cause rub as the flexing chain has more lateral ‘drift’. B) a new, non-OEM, chain - the roller pin length is less specific than the inner roller/plate dimensions on a chain. The chain pins may be adding width, enough to cause the rub. Check against your old chain to eliminate this. C) alternative front sprockets - Renthal, Afam and JT front sprockets all measure 16.9mm thickness overall, this compares perfectly with the Ducati OEM part. Any less than this and you’re putting the chain closer to the engine/SSSA by design. Equally, if the centre line of the sprocket, in riding direction, is closer to the engine, your putting the chain closer to any potential rubbing point. Using a spacer is bad practice so find the best replacement sprocket to match the size needed. D) wear on the rear sprocket carrier hub spline surface - with the rear hub being fastened on at 230nm, the softer parts in that assembly take some real hammer, especially if overtorqued with an impact wrench. This can squash the carrier causing a groove at the point where it mates with the eccentric hub spacer. If you look at used carriers on eBay you can see this really clearly on most parts. Check yours, it could be the cause of alignment issues. E) rear sprocket thickness - if you’ve changed to a quick change arrangement like a JT or Renthal carrier with quick change sprockets, be aware that these have different offsets. A JT rear sprocket is 7mm thick, a Renthal rear sprocket is 6.6mm thick. This means that the natural centre line of the Renthal will be 0.2mm closer to the centre of the bike. Enough to lead to a hair fine rub if any other cause is there too. I dare say that Supersprox are another thickness too. However, this thickness should have been factored into their carrier design. The issue arises if you use JT with Renthal with Supersprox etc, and might be the effect of accumulated tolerances/specs. F) twist, damage or flex in the SSSA - at the worst case, if your SSSA is twisted or if it allows the eccentric hub to run in anything other than perfect alignment with the front sprocket drive shaft, you could get the chain running out of line which could lead to rub. Thinking about the dynamic forces at play during hard riding, track or windy roads, there’s plenty of twist and flex possible. This could lead to rub. All said, it shouldn’t really happen in the first place. The designers only needed to build 1-2mm clearance in and this would be a non-event. But they didn’t, and look what happened! I spent a lot of money on sprockets!
I had the same problem on my 1199. The front sprocket was installed in reverse... easy to see when compared against images in the shop manual. I've run across several posts over the years from other 1199 owners who've experienced the same.
would dealer not rectify it at all? iam picking mine on friday but they know me and gave me years warranty. It has a slight rub mark on it and when questioned, the tech said its ok as its a used bike. Surely not?
I agree with the tech. As the chain guard wears, slack develops and the chain can start to rub even with the sprocket installed correctly. Renewing the guard stops it.
