1979 Honda CB900 0.9L Petrol · XTX 648T

The latest DVSA MOT test for the 1979 Honda CB900 recorded a passing outcome on 2023-04-25, with the vehicle’s roadworthiness confirmed as compliant with current standards. This is the sole MOT record available, meaning there is no prior or subsequent testing to assess a broader maintenance trend. The absence of failures or repeated advisories suggests that, to date, the vehicle has maintained a stable condition, though the single advisory—indicating worn rear suspension arm bushes with excessive movement—requires closer attention. Without further MOT history, it is impossible to determine whether this issue has progressed or been addressed, but its presence does not currently compromise safety. The advisory itself is a warning of progressive wear in the swing arm suspension system, which, if left unchecked, could lead to increased noise, reduced ride quality, or even structural failure over time. The recorded mileage of 32,542 miles for a vehicle aged approximately 47 years represents an exceptionally low annual usage rate of around 692 miles per year, far below the typical expectations for a motorcycle of this era and capacity. Such low mileage often reflects periods of prolonged storage, infrequent use, or environmental conditions that limit operational exposure. Mechanically, this usage profile has likely preserved certain components from excessive wear, particularly those subject to high stress from frequent riding, such as the drivetrain, brakes, and exhaust system. However, low mileage can also mask hidden issues—such as corrosion from standing, fluid degradation from infrequent servicing, or long-term wear from static loading in suspension or steering components. The advisory on the rear suspension arm bushes may also be more pronounced due to prolonged inactivity, as suspension elements can stiffen or degrade over time when not in regular use. For a prospective buyer, the most critical inspection areas for this vehicle should focus on the rear suspension system, given the advisory’s significance. Prioritise checking the rear swing arms for signs of excessive play or binding, listening for unusual clunking or rattling when the motorcycle is in motion, particularly at low speeds or when cornering. Visually inspect the bushings and pins for cracks, swelling, or oil leakage, and measure the swing arm movement to confirm the advisory’s severity. If the bushes are confirmed as worn beyond the advisory threshold, replacement is strongly recommended to prevent further damage to the swing arm or suspension linkage. Additionally, examine the rear tyre wear patterns for signs of uneven loading, which could indicate suspension misalignment or binding calipers. On a test drive, pay particular attention to the rear wheel’s alignment and responsiveness, as a binding or misaligned rear end can lead to handling issues or premature tyre wear. Beyond the suspension, given the vehicle’s age and low mileage, a thorough inspection of the standing corrosion is essential. Check the frame, exhaust system, and engine mounts for signs of rust or pitting, particularly in areas exposed to moisture or where the motorcycle has been stored. Corrosion in these regions can compromise structural integrity or lead to leaks in the exhaust or fuel system. Inspect the tyres for sidewall perishing, which can weaken the rubber and reduce safety margins, especially if the motorcycle has been stored for extended periods. Verify the condition of the 12V battery, as prolonged disuse can cause it to lose charge, leading to starting difficulties or electrical system failures. Finally, consider the state of the fluids, including the engine oil, coolant, and brake fluid, as their degradation can accelerate over time, even with low mileage. Check for service book stamps or receipts to confirm that time-based maintenance, such as oil changes or brake fluid flushes, has been performed according to Honda’s recommendations for the CB900. If no records exist, prioritise these services to address potential hidden wear or fluid degradation.