Honda CB400SF Import Guide UK: Cost, Shipping & Registration | AWA Auction

The Honda CB400SF Super Four is one of Japan's most iconic motorcycles — a 399cc inline-four that has been refined continuously since 1992, delivering a riding experience that punches well above its engine size. It has never been officially sold in the UK. That absence from the UK market is precisely what makes it such a compelling grey import.

In Japan, the CB400SF sells in huge volumes and is treated with the careful, regular servicing that Japanese ownership culture demands. In the UK, there is no domestic used supply — which means anyone who wants one must import directly from Japan. If you want a genuinely rare, well-built motorcycle that stands out from every other bike at the café stop, the Honda CB400SF import UK route is the only option.

This guide covers everything: total landed cost, the three main model generations, MSVA status by year, what to look for on auction sheets, and whether importing a CB400SF makes financial sense for your situation.

Why Import a Honda CB400SF from Japan?

The CB400SF occupies a unique position in the UK import market. Unlike most Japanese imports — which offer a price advantage over UK equivalents — the CB400SF offers something different: there is no UK equivalent. You cannot buy one from a dealer or find it easily in the classifieds. The only supply is Japanese auction.

That exclusivity translates into several advantages:

• Zero UK competition: No domestic used supply means the CB400SF is genuinely unusual on UK roads. Riders who know the bike recognise its quality immediately.
• JDM build quality: Bikes destined for Japan's domestic market are often finished to higher standards than export versions. The CB400SF reflects this — build quality is exceptional for the price class.
• Exceptional auction availability: Japan's 400cc class is enormous. BDS auction lists multiple CB400SF examples every single week across all three generations, giving buyers genuine choice of year, colour, grade, and mileage.
• Proven reliability: The CB400SF's DOHC 399cc inline-four is one of Honda's most robust small-displacement engines. Japanese-maintained examples with 20,000–40,000 km are typically in excellent mechanical condition.
• Accessible power: 56–58 hp from 399cc is enough for motorway work and genuinely engaging riding, while remaining approachable for riders stepping up from A2 restrictions. The VTEC system (NC39 onwards) adds an engaging character shift at higher revs.

How Much Does It Cost to Import a Honda CB400SF to the UK?

Importing a CB400SF from Japan involves four cost stages: purchase at auction, shipping, UK import taxes, and registration. Here is a complete breakdown.

Purchase Price at Japanese Auction

CB400SF prices at BDS auction vary considerably by generation and condition. The three generations — NC31, NC39, and NC42 — command different prices reflecting age and specification.

Generation	Years	Grade	Typical Auction Price	Approx. GBP
NC31	1992–1998	3–3.5	¥80,000–¥180,000	£435–£980
NC39 (pre-VTEC)	1999–2001	3–3.5	¥120,000–¥220,000	£650–£1,200
NC39 VTEC Spec II/III	2002–2007	3.5	¥180,000–¥300,000	£980–£1,630
NC42 Hyper VTEC Revo	2008–2015	3.5	¥280,000–¥450,000	£1,520–£2,450
NC42 (2016+)	2016–present	3.5–4	¥400,000–¥650,000	£2,170–£3,530

Exchange rates fluctuate — figures above use approximately £1 = ¥184. Buyer's commission (typically 10%) and Japanese domestic transport to the port add ¥20,000–¥50,000 (£110–£270) on top of the hammer price.

Shipping Costs (RoRo vs Container)

Most CB400SF imports use RoRo (Roll-on, Roll-off) shipping from Japanese ports (Yokohama, Osaka, or Nagoya) to UK ports (Southampton or Grimsby). RoRo is the most cost-effective method for individual motorcycle shipments.

• RoRo shipping: £450–£750 per motorcycle, 5–7 week transit time
• Shared container: £650–£950, slightly slower, better protection for concours-condition examples

For standard Grade 3–4 examples, RoRo is the practical choice. See our container vs RoRo shipping guide for a full comparison.

Import Duty and VAT

The UK applies standard import duties to motorcycles from Japan:

• Import duty: 6.7% of the CIF value (purchase price + shipping)
• VAT: 20% applied to the CIF value plus the import duty amount

Example calculation for a £1,200 NC39 purchase with £600 RoRo shipping: CIF = £1,800, duty = £121, VAT on £1,921 = £384. Total import taxes: approximately £505. Customs clearance agent fee adds £150–£250. For a full worked example, see our UK motorcycle import duty guide.

UK Registration Costs

Every imported motorcycle requires NOVA notification (free to submit online, 5–10 working days processing), a standard MOT (£30–£55), and DVLA first registration (£55). Budget £85–£120 for this stage. For full registration detail, see our NOVA registration guide.

CB400SF Model Guide: NC31, NC39, and NC42

Three distinct generations of the CB400SF have been produced since 1992. Each offers a different balance of price, specification, and complexity.

Generation	Years	Key Feature	MSVA Status	Recommended For
NC31	1992–1998	Carburetted, classic styling	Fully exempt	Budget buyers, classic character
NC39	1999–2007	Hyper VTEC (2-to-4 valve switching)	Fully exempt	Mid-budget, engaging VTEC experience
NC42	2008–2015	Fuel injection, refined VTEC Revo, ABS option	Exempt (pre-2016 MY)	Best all-rounder, recommended choice
NC42 (late)	2016+	Updated styling, Euro-style emissions	Requires MSVA	Enthusiasts only (MSVA budget required)

NC31 (1992–1998) — The Classic

The original CB400SF arrived with a 399cc DOHC inline-four producing approximately 53 hp — a figure that remains impressively strong for a 400cc motorcycle. The NC31 is a carburetted machine with conventional forks, a twin-shock rear, and styling that has aged well. It is the most affordable CB400SF at auction and represents exceptional value for money.

Typical auction prices of ¥80,000–¥180,000 (£435–£980) make the NC31 one of the most cost-effective performance motorcycle imports available. Total landed cost is typically £1,800–£2,800. At that price, mechanical maintenance costs (carburettor service, valve clearances) are easily justified.

NC39 (1999–2007) — Hyper VTEC Arrives

The NC39 generation introduced Honda's Hyper VTEC system — a variable valve timing mechanism that switches from 2-valve to 4-valve operation at approximately 6,750 rpm. Below the switch point, the engine delivers smooth, manageable power. Above it, there is a noticeable surge as all four valves open — an engaging characteristic that rewards riders who explore the rev range.

The NC39 went through three VTEC specifications. Spec I (1999–2001) was the introductory version; Spec II (2002–2004) refined the switch point; Spec III (2005–2007) added ABS on the high-spec variant and further refined fuelling. The fuel-injected versions of NC39 Spec III are the pick of this generation.

NC42 (2008–Present) — Fuel Injection and Refinement

The NC42 represents the CB400SF in its most developed form. Fuel injection replaced carburettors on the base model, delivering better cold-start performance, smoother fuelling, and reduced maintenance requirements. The VTEC system was further refined as Hyper VTEC Revo, with a smoother transition point and improved low-rev tractability.

NC42 models from 2008–2015 are the recommended import target: MSVA exempt, fuel injected, ABS available, and with strong auction supply. These are practical, modern motorcycles with genuine performance and exceptional build quality.

MSVA Status for UK Import

The MSVA (Motorcycle Single Vehicle Approval) test is required in the UK for motorcycles first manufactured within the last 10 years. The practical implications for CB400SF imports:

• NC31 (1992–1998): Fully MSVA exempt. All production years are 28+ years old.
• NC39 (1999–2007): Fully MSVA exempt. All production years are 19+ years old.
• NC42 (2008–2015 model year): MSVA exempt. These bikes are all more than 10 years from manufacture.
• NC42 (2016 model year onwards): MSVA required. These bikes were manufactured within the last 10 years and require MSVA testing before UK registration.

For the MSVA process on 2016+ NC42 models, the CB400SF's standard equipment typically meets most MSVA requirements — but a speedometer conversion (km/h to mph) and headlight beam adjustment are always required. Budget £350–£600 for MSVA if targeting post-2015 models. Our MSVA test guide covers the full process in detail.

Step-by-Step Import Process

Importing a Honda CB400SF from Japan involves six stages, typically taking 10–14 weeks from auction win to riding on UK roads.

1. Identify and bid at Japanese auction — AWA accesses BDS weekly. Set a maximum bid in GBP; AWA handles Yen conversion and bidding. The CB400SF appears multiple times per week across all grades.
2. Post-auction inspection — Additional photographs taken at the collecting agent's yard confirm the bike matches the auction sheet description and grade.
3. Japanese export documentation — Title transferred to export status; export certificate (Shaken certificate equivalent) issued. Typically 1–2 weeks.
4. Shipping and transit — Bike loaded at Yokohama, Osaka, or Nagoya. RoRo transit to Southampton or Grimsby: 5–7 weeks.
5. UK customs clearance — Import duty and VAT paid via customs agent. NOVA notification submitted simultaneously. Allow 5–10 working days.
6. UK registration — MOT booked once NOVA clears. V5C application submitted to DVLA with NOVA reference. First V5C issued in 4–6 weeks. Bike is legally registered and road-legal.

Read our complete import timeline guide for a week-by-week breakdown of what happens at each stage.

What to Check on the Auction Sheet

BDS (Bayerische Direktimport System — Japan's dedicated motorcycle auction) uses standardised inspection sheets with a 1–6 grading scale. For CB400SF imports, focus on these specific areas:

Engine and Mechanical

• VTEC switch behaviour (NC39/NC42): The auction sheet may note エンジン音 (engine noise) around the VTEC switch point. A clean sheet with no engine notation is ideal. Rough VTEC engagement on NC39 Spec I is common at high mileage — factor in VTEC solenoid inspection on arrival.
• Fuel system: NC31 carburetted examples — check for キャブ調整 (carburettor adjustment) notation. NC42 fuel injection — look for FI警告灯 (FI warning light) comments, which indicate ECU faults.
• Valve clearances: The 16-valve DOHC engine has tight valve clearance tolerances. Higher-mileage examples (40,000 km+) benefit from a valve clearance check on arrival. Budget £150–£250 at a Honda specialist.

Frame and Chassis

• Frame condition: The CB400SF's diamond steel frame is durable. Grade A (minor scuffs) on the frame panel is normal. Grade B or C marks should be investigated — check accompanying photos carefully for any bent sections near the steering head.
• Fork condition: NC42 uses conventional telescopic forks. Check for 油 (oil) notation indicating fork seal seeping. This is a straightforward repair (£80–£150) but useful for price negotiation.
• Rear suspension: The NC42 Pro-Link rear suspension linkage is low-maintenance but worth checking for 錆 (rust) notation on older examples stored outdoors.

Bodywork and Cosmetics

• Tank condition: The CB400SF's fuel tank is a design centrepiece. Dents (D notation) affect grade significantly. Grade 3.5+ examples are typically dent-free with only minor cosmetic scratches noted as A on the panel diagram.
• Fairing and cowls (Revo version): The NC42 Revo version has a small front fairing. Check for crack notation (割 or ヒビ) on the fairing panel — even minor cracks can be difficult to source replacement panels for outside Japan.
• Exhaust: The CB400SF's four-into-one exhaust is characterful and a key aesthetic element. Aftermarket exhaust notation (マフラー交換) is common; confirm the replacement is a quality unit and not a poorly fitted aftermarket that has cracked at the headers.

Common Problems and What to Avoid

The CB400SF is among the most reliable 400cc motorcycles ever produced — Honda's engineering and Japanese domestic servicing culture mean most auction examples are in genuinely good condition. However, there are specific items to watch for:

• VTEC solenoid wear (NC39 high mileage): The VTEC solenoid valve that controls the 2-to-4 valve switch can develop sluggish response on NC39 examples with 50,000 km+. The symptom is a hesitant or rough VTEC engagement rather than a clean rev-range transition. Part cost: approximately ¥12,000 (£65); fitting: 2–3 hours.
• Carburettor condition (NC31): NC31 examples that have sat unused show typical carburettor varnishing in the jets. A professional carburettor clean and rebuild (£150–£250) is advisable on any NC31 that has been in storage. Factor this into the purchase decision.
• Speedometer conversion: All Japanese CB400SF models display km/h only. UK registration requires an mph-reading speedometer. Options include a quality aftermarket digital unit (£80–£150 fitted), a GPS speedometer overlay (£40–£80), or ECU reprogramming on some NC42 variants. Confirm your specific model's options before committing to an approach.
• Parts availability: As a JDM-only model, some OEM parts require import from Japan. Honda's parts network means availability is generally good, but lead times of 2–4 weeks for non-UK-stocked items should be expected. Aftermarket support is growing as CB400SFs establish a following in the UK grey import community.

Honda CB400SF vs Alternatives

The CB400SF occupies a unique space — no direct UK equivalent exists. However, buyers should consider the broader 400cc–600cc import landscape:

Model	Engine	Power	MSVA Status	Typical Landed Cost	Key Advantage
Honda CB400SF NC42	399cc I4 VTEC	56 hp	Exempt (pre-2016)	£2,800–£4,200	JDM exclusive, exceptional build
Honda CB600F Hornet	599cc I4	100 hp	Exempt	£2,800–£4,200	More power, UK recognisable
Yamaha FZ6 Fazer	598cc I4	98 hp	Exempt	£3,200–£4,600	Half-faired, motorway capable
Kawasaki Z650	649cc twin	68 hp	Exempt (pre-2016)	£3,800–£5,500	Modern, lightweight twin
Suzuki SV650	645cc twin	76 hp	Exempt (pre-2016)	£3,000–£4,500	Strong community, proven

The CB400SF's case rests on exclusivity and character, not outright power. If you want more performance, the Hornet 600 or FZ6 Fazer deliver significantly more power at similar landed cost. The CB400SF is the choice for riders who value the JDM experience, the VTEC character, and riding something genuinely unusual on UK roads.

Is Importing a Honda CB400SF Worth It?

The CB400SF doesn't offer the same straightforward financial case as many other Japanese imports — there is no UK equivalent to compare against. Instead, the value proposition is different: you are paying for access to a motorcycle that otherwise does not exist in the UK market.

For the right buyer, that is a compelling proposition. The CB400SF is well-built, genuinely engaging to ride, and benefits from Honda's exceptional reliability record. Japanese auction supply is strong, and the MSVA exemption on pre-2016 models makes registration straightforward. Total landed costs of £2,800–£4,200 for a Grade 3.5 NC42 represent fair value for what you are getting — a modern, refined, exclusive motorcycle that stands apart from anything else in its price class.

For buyers prioritising outright performance-per-pound, the CB600F Hornet or FZ6 Fazer deliver more power at similar cost. But for riders who want something different, who value the JDM connection, and who are willing to manage the parts lead times that come with a UK-rare model, the Honda CB400SF import from Japan is one of the most rewarding options available.

Ready to source your CB400SF Super Four? Browse current AWA auction listings or contact the AWA team to discuss upcoming BDS sessions and available stock.

Related guides: Complete UK Import Guide · Import Cost Breakdown · Japanese Auction Buyers Guide · NOVA Registration Guide