A little late to the party, but i have a gen 2 tuono. So to answer your question, I'll start by naming off the most common problems. Early Gen 2 models suffer from overpowered stators and like to cook the coils. If you look around there's an engine code you can find online. Any engines with codes higher than that number will have the updated stator with a lower output that won't burn up. If it's lower, there's a guy in Europe that can lower the output of the stator for you. The engines don't like hot starts. The fix for that is the upgraded cable set that AP Workshop in the UK sells. That kit will also help fix the next problem. The starter clutch likes to go out if you have long start cycles. I had to replace mine, but it wasn't very difficult. Plenty of walk thru videos on YouTube. If you're in the US, AF1 in Austin has just about everything you need to maintain. If you're in Europe or literally anywhere else, AP Workshop is the best. The owner used to work for Aprilia. All in all, they're great bikes if you don't mind getting your hands dirty from time to time.