Just thought I'd share a learning I had today in regards to the use of torque wrenches, particularly for those similar to myself who are quite new to workshop DIY. Got some time (first track time ever) at Eastern Creek in October, and I'm about to head off for work for a month or so, so I thought I'd drop the oil in my KTM Duke 390 and replace the oil & filter, as well as a chain clean and such whilst I still have time. Being a diligent and padantic (inexperienced) DIY mechanic I decide to check out all the torque specifications for the sump plugs etc. from the service manual (I have a PDF for any D390 owners, inbox me if you want me to send you a copy). 15nm for the side sump plug, too easy. Gee this feels a lot more then 15nm... SNAP. Head sheared off of the threaded section. The last time I used my torque wrench was probably around 18 months ago. After double checking the specs in the manual, double checking the settings on the wrench I know something isn't right. In the booklet in my torque wrench case there was a caution note to always make sure you can get the wrench clicking on something else at least 8-10 times after the wrench has sat for long periods of time before using, especially on items requiring lower torque specs. Threaded section was easy enough to remove from the casing, just with a hammer and screw driver to back it out (no tension in the threads due to the head broken off), however its a beautiful day here in Newcastle, and of course its always nice to go for a ride after doing these things, which I can't until my new plug comes to the shop (which I won't be around to collect for a month). Stoked I didn't leave it until the day before, otherwise I'd be cancelling my Superbike School seat and losing my money.