Photo: Ronald Saunders from Warrington, UK · CC BY-SA 2.0
BSA Rocket Gold Star
84/100 Overall
68 On the road100 As a classic
Classic motorcycle head-to-head
BSA Rocket Gold Star vs Kawasaki Z1 900
BSA Rocket Gold Star scores 84/100 overall against Kawasaki Z1 900 on 87/100. On the road: 68–73. As classics: 100–100. Overall result: Kawasaki Z1 900.
Kawasaki Z1 900
87/100 Overall
73 On the road100 As a classic
The numbers
Category-by-category result
| Category | BSA Rocket Gold Star | Kawasaki Z1 | Advantage |
|---|---|---|---|
| road | |||
| PerformanceDirect comparison of power, acceleration and usable performance across the pre-1990 classic field. | 8 | 9 | Kawasaki Z1 |
| HandlingSteering, stability, weight and real-road manners. | 9 | 6 | BSA Rocket Gold Star |
| BrakingDirect comparison of real stopping ability without an age allowance. | 6 | 6 | Level |
| ReliabilityEngine, electrics and general dependability when properly maintained. | 6 | 8 | Kawasaki Z1 |
| Ease of ownershipMaintenance, parts supply and access to specialist knowledge. | 6 | 8 | Kawasaki Z1 |
| ComfortRiding position, vibration and suitability for longer journeys. | 6 | 7 | Kawasaki Z1 |
| classic | |||
| StylingDesign quality, visual presence and period appeal. | 10 | 10 | Level |
| Historical importanceInfluence on motorcycling and importance within its era. | 10 | 10 | Level |
| Collector appealLong-term desirability among classic motorcycle enthusiasts. | 10 | 10 | Level |
| CharacterSound, feel, personality and memorable riding experience. | 10 | 10 | Level |
Choose the BSA Rocket Gold Star if…
you want one of BSA's most desirable sporting twins, combining Gold Star cycle parts with muscular A10 performance.
Choose the Kawasaki Z1 if…
you want muscular 1970s superbike performance, imposing styling and major Japanese collector status.
Background
History
BSA Rocket Gold Star
The BSA Rocket Gold Star was produced from 1962–1963 and used a 646cc air-cooled parallel twin. Within this comparison library it stands out particularly for styling, historic importance, collector appeal. It suits riders who value the qualities described in its original profile rather than choosing by specification alone.
Kawasaki Z1
The Kawasaki Z1 900 was produced from 1972–1975 and used a 903cc air-cooled DOHC inline four. Within this comparison library it stands out particularly for styling, historic importance, collector appeal. It suits riders who value the qualities described in its original profile rather than choosing by specification alone.
Interesting details
Did you know?
BSA Rocket Gold Star
- Its production span in this library runs from 1962 to 1963.
- The recorded engine description is: 646cc air-cooled parallel twin.
- Its strongest comparison scores are styling, historic importance, collector appeal.
Kawasaki Z1
- Its production span in this library runs from 1972 to 1975.
- The recorded engine description is: 903cc air-cooled DOHC inline four.
- Its strongest comparison scores are styling, historic importance, collector appeal.
Present-day appeal
Collector notes
BSA Rocket Gold Star
Collector interest is strongest where condition, originality and correct period details support the identity of the BSA Rocket Gold Star. Its library score for styling is 10/10. Values and desirability can vary substantially between years, specifications and restoration quality, so individual examples should be assessed on their own evidence.
Kawasaki Z1
Collector interest is strongest where condition, originality and correct period details support the identity of the Kawasaki Z1 900. Its library score for styling is 10/10. Values and desirability can vary substantially between years, specifications and restoration quality, so individual examples should be assessed on their own evidence.
Before you buy
Buying checks
BSA Rocket Gold Star
- Confirm the frame and engine identity match the advertised model and year.
- Check cold starting, smoke, oil leaks and unusual mechanical noise.
- Check vibration-related fasteners, primary drive condition and signs of persistent oil leakage.
- Inspect the frame, wheels, brakes and suspension for wear, damage or poor repairs.
- Verify that important model-specific parts have not been replaced with incorrect later components.
- Review the paperwork, ownership history and any restoration invoices before purchase.
Kawasaki Z1
- Confirm the frame and engine identity match the advertised model and year.
- Check cold starting, smoke, oil leaks and unusual mechanical noise.
- Check carburettor balance, charging output and exhaust condition across all cylinders.
- Inspect the frame, wheels, brakes and suspension for wear, damage or poor repairs.
- Verify that important model-specific parts have not been replaced with incorrect later components.
- Review the paperwork, ownership history and any restoration invoices before purchase.
Period opposition
Historic rivals
Rivals to the BSA Rocket Gold Star
Rivals to the Kawasaki Z1
Final result
The verdict
Kawasaki Z1 900 wins the direct on-the-road comparison. As classic motorcycles they also finish level. Kawasaki Z1 900 takes the overall result after the road and classic scores are weighted equally.