Quote Originally Posted by crossbowme View Post
There concern was not that they're V Twin. They are concerned that for all practical purposes the Yamaha is truly air cooled while most, if not all, of the others are a combination of air/liquid cool of some type. As I'm sure you know, air cooled engines expand and contract more than liquid cooled engines and (supposedly) are less reliable. I know someone will chime up that they know of an air cooled V Twin with 500,000 miles on it but that was their concern.
Probably referring to oil/air cooled? My Dr650 is like that.... it's practically impossible for it to overheat. In the wintertime I have to block off the front of the radiating oil cooler so it can reach operating temperature. Suzuki made the DR650 almost too efficient in shedding heat.