Honda Cb400n (1983)
1983 Honda Cb400n
CarHunch analysed 113 real MOT records for the 1983 Honda Cb400n. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 1983 Honda CB400N passes its MOT at 80.9%, fractionally above the UK average of 80%, suggesting this middleweight is holding up reasonably well for a machine now over 40 years old. Dangerous defects are relatively uncommon at 10.6%, so you're not walking into a deathtrap, though nearly one in ten will have had a serious safety issue at some point.
These bikes are running at a sensible median of 32,408 miles for their age—not thrashed—yet they're averaging 1.12 failures and 3.2 advisories per test, pointing to manageable wear on brakes, lights, and cables rather than catastrophic problems. Before buying, get a pre-purchase inspection focused on the brake system and any corrosion on the frame, and factor in that you'll need to budget for regular maintenance to keep it MOT-legal year to year.
What to check before buying a 1983 Honda Cb400n
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Honda Cb400n
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Mileage Distribution
Most 1983 Honda Cb400n vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 1983 Honda Cb400n vehicles fall between 21,007 and 40,166 miles.
1983 Honda Cb400n — Still on the Road
20 vehicles still getting MOTs in 2023 — 53% of the peak remain.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2023.
MOT History Averages
Most Common MOT Issues — 1983 Honda Cb400n
Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.
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23.3%
Front Tyre worn close to the legal limit
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22.6%
Rear Tyre worn close to the legal limit
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16.4%
Wheel alignment slightly misaligned.
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13.7%
Drive chain worn but not considered excessive
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13%
Steering headbearing has slight free play
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13%
Headlamp aim too high
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12.3%
Drive chain slightly loose
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12.3%
Front shock absorber has light misting of stanchion
Data covers a 3-year window centred on 1983. Counts include advisories and failures.
Found a specific Honda Cb400n?
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