Bsa Gold Star 650 vs Kawasaki Z1 900
Side-by-side comparison for used motorcycle buyers
Bsa Gold Star 650 vs Kawasaki Z1 900. Bsa Gold Star 650: 45 hp @ 6,500 rpm hp, 222 kg (wet/curb weight) weight, top speed ~180 km/h (estimated), Motoryk rating 6.5/10. Kawasaki Z1 900: 82 hp @ 8,500 rpm hp, 230 kg (wet/curb weight) weight, top speed 209 km/h, Motoryk rating 8.5/10.
Performance at a Glance
Green = winner per metric · Bars are relative to the higher value
Bsa Gold Star 650
Kawasaki Z1 900
Horsepower (hp)
45 hp
82 hp
Torque (Nm)
55 Nm
74 Nm
Top Speed (km/h)
180 km/h
209 km/h
Weight (kg) — lower is better
222 kg
230 kg
Type
Classic
Classic
Horsepower
45 hp @ 6,500 rpm
82 hp @ 8,500 rpm
Torque
55 Nm @ 4,000 rpm
74 Nm @ 7,000 rpm
Top Speed
~180 km/h (estimated)
209 km/h
Weight
222 kg (wet/curb weight)
230 kg (wet/curb weight)
Fuel
Estimated 4.5–5.5 L/100km (18–22 km/L) — NOTE: Limited real-world data available as of 2023
6.5 L/100km (approx. 15.4 km/L) — estimated real-world average
Fairing
No
No
Individual Reviews
Bsa Gold Star 650
6.5/10
"Beautiful but buy carefully — early examples need thorough pre-purchase inspection."
Pros
+Stunning retro visual presence
+Tractable low-down torque
+Light and easy handling
Cons
−Early ECU fuelling problems
−Patchy parts availability
−Cheap switchgear quality
Kawasaki Z1 900
8.5/10
"Buy the best one you can find and never look back."
Pros
+Appreciating classic investment
+Stunning inline-four soundtrack
+Strong parts availability
Cons
−Electrics frequently troublesome
−Expensive to recommission properly
−Rampant fakes and restomods
Top 10 Accessories
Picks that work on either bike.









