1991 Yamaha XTZ660 0.7L Petrol · H514 HRK

The most recent MOT test on the Yamaha XTZ660 was conducted on 2025-06-10 and resulted in a clean pass, with no recorded defects. This follows a consistent pattern of passing MOTs from 2020 onwards, suggesting a generally stable maintenance regime for the vehicle. However, the advisory from 2023-05-22 regarding front brake pads approaching their minimum limit—indicating wear to the friction material—is a notable recurring concern. While the earlier failures in 2013 were unrelated to mechanical integrity (such as missing reflectors and headlamp alignment issues), the persistence of brake pad advisories warrants attention, as they suggest gradual but consistent friction material consumption. The absence of failures in the intervening years implies that the owner has likely addressed or mitigated these issues, but proactive replacement is advisable before the pads reach the legal minimum thickness of 1.5mm, which could lead to reduced braking performance or even failure under heavy loads. The recorded mileage of 30,530 miles for a vehicle aged approximately 35 years represents an annual usage rate of around 872 miles, which is exceptionally low for its age. Such low mileage often reflects periods of prolonged inactivity, particularly if the bike has been stored indoors or in a climate-controlled environment. However, low mileage can also mask underlying issues stemming from static wear, such as corrosion to the frame, suspension components, or braking systems, which may not be apparent during active use. The advisories from 2017—particularly the nearside rear tyre wear close to the legal limit and the rear shock absorber with reduced damping—highlight potential long-term effects of standing, as dampers and tyres degrade more rapidly when stationary. The rear drive chain being slightly tight could also indicate wear or stretch over time, even at low mileage, so regular inspection of chain tension and condition is recommended. For a prospective buyer, the most critical areas to inspect are the front and rear brakes, given the recurring advisory from 2023. Visually check the front brake pads for even wear and ensure they are not glazed or overheated, which could indicate uneven braking or potential failure. Listen for any grinding or squeaking noises when applying the brakes, as these may signal pad-to-disc contact or warping. The brake discs should be free from cracks or severe corrosion, and the calipers should move smoothly without binding. Test the brakes on a gentle slope or at low speed to assess stopping performance and feel for any shuddering or pulsation, which could point to warped discs or hydraulic issues. The rear suspension, particularly the central rear shock absorber, should be inspected for leaks, excessive play, or signs of failure, such as a loss of damping effectiveness or uneven ride quality. A test drive should reveal any clunking noises from the rear suspension, especially when cornering or over bumps, as this may indicate worn suspension bushes or broken coil springs. Beyond the mechanical checks, the low annual mileage suggests the bike may have been exposed to environmental conditions that accelerate degradation. Inspect the tyres for sidewall cracking or perishing, which can occur even at low mileage if the rubber has been exposed to UV light or temperature fluctuations for extended periods. Check the frame and engine mounts for signs of rust or corrosion, particularly in areas where water or moisture may accumulate, such as near the exhaust or undercarriage. The 12-volt battery should be tested for charge retention and overall health, as prolonged inactivity can lead to sulfation or failure. Additionally, since the bike has not been driven regularly, the fluids—particularly the engine oil, coolant, and brake fluid—may have degraded over time. Consult the service manual to determine the appropriate time intervals for fluid refreshments, as these can vary significantly from the mileage-based recommendations. Finally, verify that the service book has been updated, even if the MOT history is clean, to confirm that routine maintenance tasks such as chain lubrication, valve adjustments, and spark plug replacements have been attended to.