I had a '12 Griso, sold it, and now and negotiating to buy it back. Love the bike, never an issue with it, but the fuel mileage kind of makes it the anti-Empulse.
The 8v version before 2013, had the distribution engines for tapets, starting numbers of failures such distribuicion switched to rollers, my model 8V 2008 had four distribution change in only 25000 kms, the house change me always under warranty until I asked to be put new distribution rollers.
But aside from this issue the first series had other problems, poor design on the flange clutch, caused engine oil leak to the clutch. This was remedied in the 2009 series.
switching noise in neutral araound of 20,000 kms. I had bad luck with this bike, but I loved it when it worked. and certainly he spent a lot of gasoline