2009 Yamaha XJ 6 S Diversion 0.6L Petrol · GF09 SEO

A clear pattern of progressive wear has emerged across the rear brake system, the final drive chain, and the rear suspension of this XJ6, with each of the last three MOT tests carrying advisories that point toward consumable ageing rather than structural concern. The most recent test on 4 October 2025 recorded a pass alongside a rear brake disc advisory for wear not yet considered excessive, but the rear discs have now appeared on advisories for two consecutive years, and the front disc was also flagged in 2024 for button wear alongside a similar note. Combined with the recurring drive chain advisories for slack and wear across 2023 and 2024, the trend suggests mechanical items that are slowly approaching their service thresholds and will likely require attention within the next inspection cycle. Notably, the 2023 test also recorded a light oil misting on the offside front shock absorber and a distorted brake fluid sight glass that prevented fluid level verification, both of which are worth monitoring as the machine approaches the next assessment. The recorded mileage of 24,901 miles across seventeen years equates to an annual accumulation of only around 1,465 miles, which is unusually low for a motorcycle of this vintage and indicates either extended periods off the road or consistent light recreational use. The MOT history shows no significant gaps in testing, which suggests the machine has remained on the road and presumably in occasional use rather than being stored for prolonged lay-ups, but the low annual figure still means many components will have aged through time-related degradation as much as through mechanical wear. Rubber elements such as suspension bushes, fork seals, brake hoses, and drive chain internal lubrication will deteriorate regardless of mileage, so the time-based wear pattern reflected in the rear shock corrosion advisory from 2024 and the oil misting in 2023 is consistent with this usage profile. A compression test and careful inspection of age-related rubber and electrical items would therefore be sensible. For a prospective buyer, the drive train and braking system deserve the closest physical inspection. Check the chain for tight spots by pulling it away from the sprocket at the rear and rotating the wheel slowly, ensuring tension is consistent rather than uneven, and look for stiff links that indicate the chain is nearing the end of its service life given the 2024 advisories. Examine both sprocket sets for hooked or shark-fin tooth profiles, as a worn chain typically accelerates sprocket wear. On the brakes, feel for a solid lever and pedal response without sponginess, listen for binding or scraping from the calipers, and check the front master cylinder reservoir directly because the 2023 tester could not see fluid through the sight glass, which can mask a low fluid level caused by pad wear or a slow leak. The discs should be measured with a micrometer if possible, as the front and rear discs have both been flagged in successive tests and are likely close to minimum thickness. The rear suspension and shock absorber area also warrants direct examination, particularly as the 2024 test recorded corrosion on a rear road spring and the 2023 test flagged oil misting on the front shock. On a test ride, listen for clonking or knocking noises from the rear over uneven surfaces, which can indicate worn shock linkages or top mounts, and check for any visible weeping of fluid around the front fork or shock body. Because the mileage is low, the engine itself is unlikely to have suffered from heavy mechanical wear, but starting from cold and listening for uneven idle, rattles on overrun, or excessive smoke from the exhaust will confirm general mechanical health. Finally, inspect the general condition of the chassis and swingarm for surface corrosion, confirm the tyre dates and tread depth, and verify that all electrical systems, lights, and instruments function correctly before purchase.