Tough twin in dangerous chassis, which speed wobbles. Starters and generators can burn out, worn examples of the former mangle the crankshaft. Some XS650’s had dodgy pistons at around 15k. Still usable with as much as 75 thou on the clock, many broke the 100k barrier. Top end engine rattles normal. Expect exhaust, caliper and electrical rot. Lots of imports.
1971-78, 654cc OHC twin, 54/50hp 120/110mph 60/50mpg