Honda Cb400nc (1983)
1983 Honda Cb400nc
CarHunch analysed 129 real MOT records for the 1983 Honda Cb400nc. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
This 1983 Honda CB400NC is a rare survivor with a 2.2% first-time pass rate—far below the UK average of 80%—but the absence of dangerous defects (0%) and near-zero failures per vehicle (0.01) suggests these bikes simply aren't being put through MOT in regular service. The median mileage of 45,095 miles is remarkably low for a 40-year-old machine, indicating most of the 129 bikes in this dataset are lightly used or stored rather than daily riders.
What this tells you is that the CB400NC still runs when tested, but you're looking at classic/collector territory where age and dormancy matter far more than mechanical wear. Before buying, verify full service history and have a specialist inspect fuel system and rubber components (seals, gaskets, hoses) which deteriorate regardless of mileage after four decades.
What to check before buying a 1983 Honda Cb400nc
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 Cb400nc
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 Cb400nc 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 Cb400nc vehicles fall between 21,395 and 45,095 miles.
MOT History Averages
Most Common MOT Issues — 1983 Honda Cb400nc
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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85.7%
Drive chain sprocket carrier worn but not considered excessive
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85.7%
Front Brake disc(s) slightly worn
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71.4%
Front Brake disc worn, but not excessively
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57.1%
Rear Tyre worn close to the legal limit
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57.1%
Drive chain slightly loose
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28.6%
All direction indicators flashing less than 60 times a minute
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28.6%
Throttle operating incorrectly
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28.6%
Front suspension assembly slightly corroded.
Data covers a 3-year window centred on 1983. Counts include advisories and failures.
Found a specific Honda Cb400nc?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.