Hey guys, I have over 6000 miles on my 821 Dark and its about 14 months since I bought it. It is my 1 and only form of transportation so I ride it daily. I have noticed this problem that you mentioned as well, and I have noticed this the whole time I have owned and operated it. I am 100% positive that I have the exact same behavior going on at 4000 RPM at roughly 40 MPH. Mess around at 6000 RPM and you might find another "sweetspot" like I have. It really seems to get in the way of a good cruising speed sometimes :kaioken:
From the lite research I have been doing I am blaming the Exhaust Flap and the ECU. You can unplug the Flap but the Stock ECU is not going to like it and it's not going make your engine run any better - and I believe there is a post on these forums about it running worse, but I don't know about that personally. I would be very interested to see if this problem is corrected by a set of Termi's and the associated ECU upgrade.
Link to that post is here... http://www.ducati.org/forums/ducati-monster-821/66264-who-disabled-exhaust-flap-talk-me.html
This bike really has a personality of its own in my opinion, and I don't think it likes to be babied one bit
. I was upset for MONTHS about this very issue but after some time I started to understand the bike better and I naturally adjusted my riding style to figure out how to make it all smooth. Other manufacturers/bikes may operate just as you would expect right out the box, but this bike takes a little more time, experience and understanding. Once you have all of that I am pretty sure you will not be sitting at 4000 RPMS unless your stuck behind someone :yo: (Or unless you are breaking-it-in.. so sorry for you)
Also, the other half the puzzle... I just started riding the thing really damn hard. I am NOT saying fast and reckless, but you gotta get a bit rough with this M821, it really does not like to be babied one bit. You can cruise, but it wants you to be up in a higher RPM than I initially thought/wanted to be...
Anything less than 3000 RPMS and the bike will be grumbling at you.
Between 4000-5500 things start to get good, maybe a good slower cruising pace as long as you stay away from the 4,000RPM/42MPH combo.
Between 5500-7800 is the bikes absolute HAPPY PLACE and this is where everything comes together for me. The shifting feels smooth as butter, the engine braking is very steady, the brakes handle the speeds just fine, the bike is really in it's element while in this range. (I did mention another spot around 6,000 but it's not quite as noticeable or distracting),
Anything Over 8000 and the bike opens up the gates of hell underneath you. Coupled with the ridiculously loud stock exhaust its just raw/full power vibrating throughout the bikes frame, seat, footpegs and handlebars. It feels very wild during these heavy throttle situations and it's equally as fun as it is unnerving :ahhh:
This is just my own opinions and experiences with the bike and other people could have vastly different takes on everything that I have said here. I don't expect everyone to be riding the same as I do and Im sure there are other ways to ride this bike than how i have described here. This is just my own personal experience.
Lastly, I still expect there to be some kind of solution to this problem though and just because you can "ride around the inherent fault" does not excuse it for being there to begin with, I hope it can be fixed.