Honda CB250N is also called as Deluxe Super Dream and was produced from 1979 to 1981. Honda CB250N Super Dream has a 249cc engine,four-stroke, air cooler, which features three valves per cylinder, two inlet and single exhaust driven from the SOHC (Single Overhead Camshaft), it offers six speed transmission and capable to run at maximal speed of 90 mph (140 km/h). While in Honda CB400N is fitted a parallel twin, 395cc engine, four stroke,twin, air cooling system, OHC (Over Head Camshaft), and six-speed manual gearbox. Honda CB400N very closely related with Honda CM400E, Honda CM400A, and Honda CM400T, Honda CB400 Hawk and Honda CB400A.
This manual is a good starting point for those who want to know further about all features, controls, engines, maintenance, service routines, specifications of both 1981 Honda CB250N Deluxe and Honda CB400N motorcycle.
Download: 1981 Honda CB250N Deluxe, CB400N Owner's Manual .pdf - (2.9 MB, 144 pages)
The Paperback version is available here: 1981 Honda CB250N Deluxe, CB400N Owner's Manual (amazon affiliate).