In the plus column? Half as many valves and air/oil cooling make the elemental engine much less expensive to maintain than its more powerful brothers. Inside, beryllium bronze seats help valves maintain proper tolerance, and the 94mm pistons seal against cylinder walls with nitride steel rings that help cut oil consumption. According to Jeff Nash, preeminent desmo doctor and owner of Advanced Motorsports (www.advancedmotorsports.com) with shops in Alvarado and Dallas, Texas, the Dual Spark 1000 is one of the most reliable Ducati engines yet, but don't buy one with a sketchy service history. It's allergic to blatant neglect, and runs rough if those 45mm throttle bodies come out of sync. A bad temperature sensor can wreak havoc on the fuel injection's enrichment circuit, making the Monster ill-tempered and hard to start, but installing a new one is easy. Worn cush-drive rubbers can make the driveline feel sloppy. Also, make sure you get all three keys along with the pink slip: two black ones and a red one. _Especially _that red one, otherwise known as the code key, and the only way to program a replacement to cue Ducati's electronic immobilizer circuitry if the others go missing. Lose it and you'll spend $2800 on a new ECU and dash. But as long as you can keep track of the original set, everything else is simple.