^ It is a design flaw for it to be even POSSIBLE to install the oil filter backwards in such a manner that it blocks all oil flow.
For something like this, which is very likely to be serviced by people who do not have the service manual in front of them and/or are mechanically incompetent and/or do not give a crap (quickie oil change places), the oil filter installation should be idiot-proofed. Most cartridge filters are idiot-proof ... either the filter is symmetrical so that it doesn't matter which way it gets installed, or the asymmetrical filter fits over something that either won't allow the filter to be installed the wrong way at all or prevents the cover from being installed if it is put in the wrong way.
I have a suspicion that the oil filter installation in this bike is, in fact, idiot proof (the filter is meant to fit over a stub pipe, and if you have it the wrong way, the end of the filter with no hole won't fit over that pipe and failing that, you won't be able to install the cover), and the engine simply blew up independently of the oil filter situation.
For something like this, which is very likely to be serviced by people who do not have the service manual in front of them and/or are mechanically incompetent and/or do not give a crap (quickie oil change places), the oil filter installation should be idiot-proofed. Most cartridge filters are idiot-proof ... either the filter is symmetrical so that it doesn't matter which way it gets installed, or the asymmetrical filter fits over something that either won't allow the filter to be installed the wrong way at all or prevents the cover from being installed if it is put in the wrong way.
I have a suspicion that the oil filter installation in this bike is, in fact, idiot proof (the filter is meant to fit over a stub pipe, and if you have it the wrong way, the end of the filter with no hole won't fit over that pipe and failing that, you won't be able to install the cover), and the engine simply blew up independently of the oil filter situation.