I had the same questions when I started looking. I watched all the forums on the dt300i after they got them in Australia about 3 years ago and the same on the 500. I mainly looked for people having problems. Basically I didn’t see much on the 300 but have seen several issues on the 500 in the same time period. Drive belts, water pumps, clutches, etc. I bought the 300, have 5000K on it now. I have had 1 issue which turned out to be a loose connection. I ride 100K a day to work in all kinds or weather. I have had the machine to 120K passing cars and had throttle to spare. I am planning a trip next year with it which will be about 7000K. I had some trouble getting it in Canada as it was a new item this year and still have the only one in this part of the country. I would buy one again if something happened to this one.