🔧 Service Schedule & Parts
Affiliate · we may earn| Service item | Every | Typical cost | Parts |
|---|---|---|---|
| 🛢️ Engine oil + oil filter | 3,000 km / 2,000 mi or 6 mo | $30-60 | 🛢️ Buy → ⚙️ Buy → |
| 🌬️ Air filter | 6,000 km / 3,500 mi | — | 🌬️ Buy → |
| ⚡ Spark plugs | 6,000 km / 3,500 mi | — | ⚡ Buy → |
| 🔧 Valve clearance check | 12,000 km / 7,500 mi | $150-300 | |
| 🔗 Chain & sprockets | 20000-30000 km (replace) | $100-200 | 🔗 Buy → |
| 🛑 Brake pads | 10000-20000 km | $25-50 | 🛑 Buy → |
| 💧 Brake fluid | 24,000 km / 15,000 mi or 2 yr | — | |
| 🛞 Tires | 15000-25000 km | $150-300 | 🛞 Buy → |
| 🔩 Major service | 12,000 km / 7,500 mi | $200-400 |
What Buyers Should Know
Torsion Bar Valve Springs
The CB400T used an unusual torsion bar valve spring system instead of conventional coil springs, which was innovative but can be a maintenance headache — inspect carefully as worn components are harder to source today.
Watch the Carbs
The twin CV carburetors are prone to gumming up from ethanol-blended fuels after sitting, so always check for smooth throttle response and clean idle — a full carb rebuild is often needed on neglected examples.
Strong Beginner Resale
These bikes hold steady value in the classic commuter market due to their approachable LAMS-friendly power and retro appeal, making well-kept examples surprisingly easy to resell if you decide to upgrade.
Top 10 Accessories
Curated picks for the Honda Cb400 (likely Cb400n/cb400t) — owned, ridden, recommended.
Common Problems
🔥 2 CRITICALCold start, idle quality, hesitation under throttle
Cold startup rattle disappearing once warm
Battery voltage at idle, check for overcharging
Oil residue on fork lowers and front wheel
✅Pre-Purchase Checklist
Solid, simple bike if maintained regularly
More Honda Cb400 (likely Cb400n/cb400t) Guides
More from Honda
View all Honda models →Community Reviews
Discussion
Frequently Asked Questions
What are common problems with the Honda Cb400 (likely Cb400n/cb400t)? +
Carb jets clogged from old fuel sitting: Cold start, idle quality, hesitation under throttle (moderate) | Cam chain tensioner wear causes rattling: Cold startup rattle disappearing once warm (moderate) | Rectifier/regulator failure kills battery: Battery voltage at idle, check for overcharging (serious)
Is the Honda Cb400 (likely Cb400n/cb400t) good for beginners? +
Not really — the Honda Cb400 (likely Cb400n/cb400t) is better for experienced riders.
Is the Honda Cb400 (likely Cb400n/cb400t) reliable? +
Owners report 2 critical issues to watch for on the Honda Cb400 (likely Cb400n/cb400t), notably: Rectifier/regulator failure kills battery (Battery voltage at idle, check for overcharging). Buy with a pre-purchase inspection.
Is the Honda Cb400 (likely Cb400n/cb400t) good for daily use? +
Better as a weekend/track bike than a daily — it's a specialist machine.
What gear should I buy for a Honda Cb400 (likely Cb400n/cb400t)? +
Motoryk has curated a Top 10 gear list specifically for the Honda Cb400 (likely Cb400n/cb400t), covering engine oil, tires, chain, battery, and brake pads — see motoryk.com/bikes/honda/cb400-likely-cb400n-cb400t/top10. Each pick is matched to this bike's spec.