Hi Folks, In the last few weeks I've found that at motorway speeds the bike almost feels a bit like it's misfiring if I hold it on a constant throttle. It's not so noticeable if the bike is on cruise control. Hard to pin-point what it is - I was even suspecting dodgy wheel bearings or a tight spot in the chain, and while there chain drive does induce a lot of drag (downhill stretch of dual-carriageway, pull the clutch in at 70, and watch the speed reduce) I'm fairly convinced it's some kind of fuelling issue. Almost as though it's running a bit lean. I'd whip the air filter out to check it if I had half a day spare, and the patience of a saint! I'm actually wondering if it could be some contamination in the fuel - water in the tank, or even just that it runs crap on E10 (I'm putting in E5 next time). Just wondered if anyone else has experienced anything similar, or you have any theories? Thanks! Nik
I've got similar, so interested in hearing what others say. Mines like a very slight surge type thing at steady throttle.
Exactly that. Almost like gusty wind is causing small changes in my speed (except it can’t be because it’s a recent thing)
What you are describing in my experience is a Ducati, I have had two and they both did this to some degree. Try a tank of Higher octane? Dealer told me about the 2002 St4s. "i can get it running perfectly at 5K but it shall be rubbish elsewhere"
I’ve owned 5-6 fuel injected Ducatis, and now done well in excess of 20,000 miles on this one, and never had a fuel injection issue before. So I’m afraid that doesn’t wash!
From my very limited experience playing with Ducati's (albeit the older 2V variety) problems like this were usually cured with a TPS rest, throttle body re-balance and CO trim adjustment at home. I understand the newer bikes are a bit more complicated, so a trip to the dealer may be your course of action ?
Filled with contaminated fuel, water I think, in Italy once. Bike ran as you describe for quite a few subsequent fill ups. It gradually improved, should have syphoned the lot out but couldn't be arsed at the time.
Hi, I have also experienced the issue you mention. It caused me a lot of aggravation and I caution you to be vigilant whilst this problem is evident. Long story short. There is a pre-formed rubber pipe about 70 mm long with 2 x 90 degree bends in it. It connects between the fuel injection system and a sensor on the airbox. The first bend had a split in it, which had opened up over time due to fatigue. The bike went from misfiring to becoming unrideable (or as the mechanic at my dealer ship put it 'like ridding a bucking bronco'). This all developed after a few hundred miles. I pleaded with the dealer to pull the tank off and take a look at the air intake system. They wouldn't do it until instruction had been received from Ducati. This took almost four weeks (my bike remained at the dealer, fault reported two weeks before it went to the dealer) by which time I had told them I was going to reject the bike under the sale of goods act. I called Ducati customer services and demanded to know what was going on. Within 90 minutes my dealer had received instruction to replace a fuel injector, HT lead, spark plug and ignition coil. They disassembled the bike in preparation for the work per Ducati's instruction. Hey presto, they fond the faulty sensor tube. They replaced this and road tested the bike; it resolved the issue. Had the dealer followed Ducati's instructions, the bike would have remained unrideable. The fix was completed less than 24 hours before a bike tour. I was not happy and so far have received no apology or acknowledgement from Ducati. I can tell you that the sense of misfiring at 3000 to 3500 rpm in 5th gear (50 mph) is still evident, but I can ride around this. My confidence in the bike is not very high though. I hope my concerns are unfounded as I love the bike but can't tolerate an unreliable and undependable motorcycle. My bike was new and I took delivery at the end of January, so one of the very first V2S models. Early adopter syndrome at work, perhaps.
