2004 Suzuki LTZ400 0.4L Petrol · FN54 AAV

The defining mechanical story for this 2004 Suzuki LTZ400 is one of essentially cosmetic and trivial compliance issues rather than any meaningful structural or mechanical deterioration. Across the recorded test history, there have been no advisories relating to suspension components, braking systems, steering, drive chain, exhaust integrity, corrosion, or lighting function. The single Major failure recorded, a missing front registration plate in May 2024, is purely an administrative and identification defect rather than a mechanical or safety concern, and the only Prescriptive failure in May 2025 was an offside front direction indicator not working, a routine electrical bulb or connection fault common to any older vehicle. The most recent outcome on 22 May 2026 was a clean pass with no defects recorded, continuing a pattern where the substantive roadworthiness items have remained consistently compliant. Mileage data is not available in the DVSA records, so no annual accumulation rate or usage pattern can be calculated for this 22-year-old machine. What can be established from the testing timeline is that the vehicle has been presented for MOT annually without multi-year lay-up gaps, indicating it has remained in active use on public roads throughout the recorded period. The absence of mileage entries means a prospective buyer cannot correlate component wear against distance travelled, which places greater emphasis on a physical inspection to assess whether the brakes, chain, suspension, tyres, and chassis reflect a machine that has actually been ridden rather than left dormant. The LTZ400 is a quad bike frequently used off-road, so even modest annual mileage can translate into significant mechanical wear on chain, sprockets, brake pads, and suspension bushes. The only advisories of note concern front tyre tread depth and edge wear, recorded in May 2024 with both the nearside and offside front tyres flagged as worn close to the legal limit and worn on the edge, measuring 1.6mm and 2.0mm respectively. Although these advisories have not reappeared in subsequent tests, suggesting replacement tyres were subsequently fitted, edge wear on a quad bike is a specific mechanical symptom that warrants direct investigation during any physical inspection. It typically points to incorrect tyre pressures, misaligned or worn front suspension geometry, or excessive camber, and on the LTZ400 it can also stem from the independent front suspension A-arms or steering tie rods being worn, allowing the wheels to toe in or out under load. On a test ride, listen for clonking or knocking from the front end over uneven ground, check for any wandering in the steering, and visually inspect the front tyres for uneven inner or outer shoulder wear that would confirm a geometry or component issue rather than simply tyre age. Beyond the tyre and indicator concerns, attention should focus on the components most heavily loaded on a sport quad of this age. Inspect the brake calipers and discs for binding, uneven pad wear, or corrosion pitting, as the LTZ400 is known for seizing front calipers if stored damp. Examine the drive chain and both front and rear sprockets for hooked teeth or stiff links, and verify the chain adjusters have sufficient travel remaining. Check the rear shock absorber and front suspension linkages for oil seepage or perished bushes, look over the exhaust system for corrosion at the header pipe joint, and confirm that all lighting, including the indicators, brake light, and main beam, functions correctly. Finally, verify the Vehicle Identification Number plate is present, securely fixed, and legible, addressing the prior registration plate failure directly.