1978 Honda CB400N 0.4L Petrol · HAH 927T

The vehicle’s most recent MOT test on 2025-09-11 at 9,168 miles confirms it remains roadworthy, with no defects or advisories recorded. This represents a stable maintenance trend over the past three years, as the previous test on 2022-07-13 also passed without issues at the same mileage. The absence of recurring faults suggests the vehicle has not undergone significant mechanical neglect, though the lack of advisories does not preclude hidden wear—particularly in components not routinely tested, such as suspension bushes or drivetrain seals. The recorded mileage of 9,168 miles over nearly 48 years equates to approximately 191 miles annually, which is exceptionally low for a motorcycle of this vintage. The identical mileage at both tests implies the odometer has not been tampered with, but the prolonged inactivity raises concerns about static-related deterioration. Components such as the fuel system, battery, and rubber seals may have degraded due to extended periods of non-use, while the engine’s lubrication could have broken down if the oil was not regularly changed. The gap between tests—nearly three years—also means critical consumables like tyres, brake pads, and chain may have worn beyond their intended service life. A buyer should prioritise an inspection of the fuel system for sediment or stale fuel, as prolonged storage can cause carburettor clogging or injector failure. The battery should be tested for residual capacity, and the electrical system checked for corrosion in connectors, which is common in older motorcycles left unused. Tyres, despite passing MOT standards, may have developed internal degradation; look for cracks in the sidewalls or uneven wear patterns. The chain and sprockets should be examined for rust or elongation, as they are not covered by MOT testing and could fail catastrophically if neglected. Finally, inspect the suspension for stiffness or leaks in the dampers, and the brakes for binding or excessive wear on non-rotating components, as these are not always caught in a basic MOT.