Classic and Classy Motorcycles Ltd

Vintage and Classic Motorcycle Importers

1970s Kawasaki KH400 400cc Triple Valuation Report

Date: August 2025

Historical Overview

The 1970s Kawasaki KH400 (an evolution of the KH250 and S3 triple) offered lightweight performance with three-cylinder two-stroke power. UK buyers now prize models with originality, low mileage, and sensible restoration—making the KH400 a coveted mid-sized classic.

UK Valuation Summary (by condition)

Condition	Estimated Value (GBP)	Example External Source
Project / Restoration Non-running frame or partial bikes needing rebuild.	£3,250 – £3,750	Car & Classic – 1976 KH400 “ride or restore” project listed at £3,250; similar listing at £3,750.
Roadworthy / Presentable Running, rider-quality, decent condition with age-appropriate wear.	£4,500 – £6,000	Mathewsons – 1974 KH400 sold for £5,500.
Restored / Excellent High-quality restoration or exceptional original with paperwork.	£6,800 – £7,500	Manor Park Classics – 1976 KH400 “stunning example” sold for £7,475.

Notes: Project band based on recent UK listing prices; Roadworthy based on mid-tier auction result; Restored values guided by high-quality documented sales. Highly original or rare examples may push toward upper band.

Value Influencing Factors

Condition of engine & frame: Intact two-stroke triple and frame integrity are key.
Original parts & paint: Matching signs, correct tank, exhaust, instrumentation.
Documentation: V5, receipts, restoration history enhance value.
Rarity & finish: Unusual colours or factory specials may attract premium.
Market timing: Spring markets tend to deliver stronger sale results.

Conclusion

In the UK 2025 market, a KH400 project typically sells for £3,250–£3,750, roadworthy examples go for £4,500–£6,000, and beautifully restored models reach about £6,800–£7,500. Proper provenance and originality continue to uplift top-tier results.

Sources (non-link references):
Car & Classic – 1976 KH400 ride/restore project listing at £3,250 and £3,750;
Mathewsons Auction – 1974 KH400 sold for £5,500 (July 2024);
Manor Park Classics Auction – 1976 KH400 stunning example sold for £7,475 (Oct 2024).