Originally Posted by jimmyboris
Thanks for your knowledge. What do you mean by dropping the bike? How often is 'lots of oil changes' and which oil would you say to choose?
All Air/Oil cooled motors really benefit from Synthetic oil. Does not need be moto $$$ specific $$$ Syn oil, Syn car oil is fine. In cool weather 3000 to 4000 miles is about right. In hot weather, around 3000 miles should be OK. If you can't find good synthetic, then shorter intervals may be a wise move. (like 1000 to 2000 miles depending)
The DR650 is easy on oil, unlike Honda singles like the XR's, XL's (Dominators). Some air cooled Honda's tear oil up quickly, as they run a lot hotter. (No oil coolers on some) The DR oiling system is quite good. Read up on it "SACS"
Keep valves in spec, NSU bolts tight, don't bang shifts and you are good for over 40K, as noted here, many have gone much further.