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All Bikes/Ajs/18s/Problems
← Back to Ajs 18s

Ajs 18s Common Problems

Known issues to inspect before buying a used Ajs 18s. What to check and how much repairs cost.

Engine overheating due to cooling system failures

SERIOUS

Coolant level, radiator condition, fan operation at idle

Fix cost: $200-$600

Electrical gremlins and ECU faults

MODERATE

Warning lights, check full electrical function before buying

Fix cost: $150-$500

Brake caliper corrosion and sticking

MODERATE

Even brake feel, inspect calipers for rust and leaks

Fix cost: $100-$350

Chain and sprocket wear from neglect

MINOR

Chain slack, sprocket teeth sharpness, lubrication condition

Fix cost: $80-$200

Pre-Purchase Checklist

☐Pull full service history records
☐Cold start test for smoke or hesitation
☐Check frame for crash damage or welds
☐Verify VIN matches all documents

Decent build, but maintenance history is everything