1978 Yamaha XS650 0.7L Petrol · DMJ 81T

A pattern of brake‑related advisories dominates the MOT record of this 1978 Yamaha XS650, with the most recent 2019 test passing but noting a bent front brake lever. Earlier tests in 2017 flagged a slightly deteriorated front brake hose and a minor fluctuation in rear roller‑brake effort, while the 2006 inspection added a slightly loose drive chain to the list of items requiring attention. The absence of outright failures suggests the bike remains road‑legal, yet the recurrence of brake‑system comments points to a component that may need proactive replacement or refurbishment to ensure consistent stopping performance. With only 22,032 miles recorded over roughly 48 years, the average annual accumulation sits at about 460 mi, indicating very light use or extended periods of inactivity. Such low mileage reduces wear on consumables such as tyres, brake pads and clutch plates, but it also means rubber and polymer components have aged in place, potentially becoming brittle or developing internal cracks. The long gaps between MOTs – a ten‑year interval between 2006 and 2016 – reinforce the likelihood of prolonged storage, which can exacerbate corrosion, especially on the front and rear mudguards noted as “very rusty” in 2006, and can affect the integrity of the drive chain and brake hose even without high mileage. When inspecting the bike, give particular focus to the front brake lever for any lateral play or flex when applied, and verify that the lever returns to its neutral position without binding. Examine the front brake hose for surface cracking, hardening, or any signs of fluid leakage, and test the rear roller brake by applying the rear brake lever and feeling for a smooth, consistent pull; any jerking or uneven effort may confirm the earlier fluctuation noted. The drive chain should be checked for correct tension – it should have a slight slack of about 20‑30 mm at its midpoint – and for signs of wear such as elongated links, stiff pins or excessive rust, especially given the “slightly loose” advisory from 2006. Finally, assess the overall corrosion state of the frame and mudguards, probing for rust that may have progressed beyond surface staining, particularly around mounting points for the suspension and brake components. Inspect the front fork gaiters for tears or hardening, as degraded gaiters can allow moisture to reach the fork seals, leading to oil leaks or reduced damping. A short ride should reveal any abnormal noises – such as knocking over bumps that could indicate worn suspension bushes or loose chain tension – and should confirm that braking feels balanced front to rear without pulling to one side. Addressing the brake‑system items and confirming the structural integrity of the chassis will be essential steps before committing to purchase.