Based on a small sample poll,
DL1000 Clutch Chudder annoyance poll , about half of DL1000s develop clutch basket chudder. A couple of people here have fixes. A new basket will wear into chudder again. It's a design problem.
The 1000's engine runs on the bleeding edge of lean requiring precise synching of the two throttle bodies and sometimes a remap of the fuel amounts. Such a remap is a violation of EPA regulations for a business such as a dealership to do and California, at least, prohibits sales of certain devices that can do it.
A rear wheel spacer exchange program is available that moves the rear sprocket 2mm farther into the rear hub. Proponents say it lines up the sprockets better and makes the rear rubber cushion blocks last longer as well as the sprockets and chains. Detractors say it's not needed.
The stock gearing is very tall. Many riders prefer 17/43, 16/43 or something else other than the stock 17/41. A sprocket change also changes the speedo and odo calibration so a speedo healer is a popular accessory.
The 1000 is not as busy but it's not as smooth or fuel efficient at lower speeds as the 650 either. The added power makes up for any such little idiosyncrasies for happy owners though. At higher speeds, the 650's struggle to push the air aside using less power can cause both bikes to have similar fuel economy.