Ducati 125 TV Testone (1962-68) vs Honda CBR 600RR Repsol (2013) vs Yamaha RD 125LC YPVS (1985-86) vs Norton Commando 961 California 50th anniversary (2018)
Comparison technical specifications
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| Make: | Ducati | Honda | Yamaha | Norton |
| Model: | 125 TV Testone | CBR 600RR Repsol | RD 125LC YPVS | Commando 961 California 50th anniversary |
| Years: | 1962-68 | 2013 | 1985-86 | 2018 |
| Engine: | Four stroke, single-cylinder, OHC, bevel gear driven | Four stroke, transverse four cylinder, DOHC, 4 valve per cylinder. | Two stroke, single cylinder | Four stroke, parallel twin with push-rod valve actuation, 3 bearing crank balancer shaft, 2 valves per cylinder |
| Capacity: | 124.4 cc / 7.6 cu in | 599 cc / 36.5 cu-in | 123 cc / 7.5 cu-in | 961 cc / 58.6 cu in |
| Bore x Stroke: | 55.2 x 52 mm | 67 x 42.5 mm | 56 х 50 mm | 88 x 79 mm |
| Compression Ratio: | 7.0:1 | 12.2:1 | 6.4:1 | 10.1:1 |
| Cooling System: | Air cooled | Liquid cooled | Liquid cooled | Air cooled |
| Induction: | Dell'Orto UB18BS or ME18BS carburetor | Dual Stage Fuel Injection (DSFI) with 40mm throttle bodies, Denso 12-hole injectors | 24mm Mikuni carburetors | Fuel injected |
| Ignition: | Battery and coil, 6V 40W generator | Computer-controlled digital transistorized with electronic advance and independent four-cylinder 3D-mapped computer control. | Hitachi CDI | Electronic |
| Starting: | Kick | Electric | Kick | Electric |
| Max Power: | 4.8 kW / 6.5 hp @ 6500 rpm | 118 hp / 88.1 kW @ 13500 rpm | 20 hp / 15.5 kW @ 9500 rpm | 59.7 kW / 80 hp @ 6500 rpm |
| Transmission: | 4 Speed | Close-ratio 6 Speed | 6 Speed | 5 Speed, constant mesh |
| Final Drive: | Chain | #525 O-ring chain | Chain | Chain, 525 "O" ring |
| Front Suspension: | Hydraulically damped telescopic forks, Marzocci | 41mm inverted Big Piston Fork with spring preload, rebound and compression damping adjustability | 32mm Telescopic forks | Ø43 mm Öhlins USD, adjustable preload, compression, and rebound damping. |
| Rear Suspension: | Swingarm, dual shocks, 3-way adjustable | Unit Pro-Link HMAS single shock with spring preload, rebound and compression damping adjustability | Monocross linkage 6-way preload adjustment | Öhlins reservoir-style twin shocks, adjustable ride height, preload, compression, and rebound damping. |
| Front Brakes: | Drum, 123 mm | 2x 310mm discs 4 piston calipers | Single 245mm disc | Brembo 2 x Ø320 mm fully-floating high carbon stainless steel discs, 4 piston "Gold Line" Brembo radially mounted calipers. Brembo "Gold Line" front brake master cylinder with integral reservoir |
| Rear Brakes: | Drum, 123 mm | Single 220mm disc 1 piston caliper | 130mm Drum | Brembo single Ø220 mm disc, 2 piston "Gold Line" caliper. Brembo rear brake master cylinder |
| Front Tyre: | 2.75 - 16 | 120/70 ZR17 | 2.75-18-4PR | 120/70 -17" |
| Rear Tyre: | 2.75 - 16 | 180/55 ZR17 | 3.00-18-6PR | 180/55 -17" |
| Seat Height: | 790 mm / 31.1 in | 820 mm / 32.3 in | 775 mm / 30.5 in | 813 mm / 32 in |