Simple single that can run to 35k with few problems as long as the oil’s changed every 1000 miles. Kickstart gear’s weak and valves, rockers and cam can go down within 20,000 miles. Spares are now becoming rare but quite a few bikes have survived 15 years of abuse. DR400’s reliable and robust but off-road abuse often destroyed them. Some SP’s were converted for road use.
1979-81, 369/396cc OHC single 30hp 90mph 85/75mpg 300lb