Suzuki GR 650 Tempter (1985-89) vs Kawasaki ZX-6R (2007) vs Beta RS 500 (2015) vs Ducati 125 Six Days (1977-78) vs Kawasaki BJ 250 Estrella (2007-10)
Comparison technical specifications
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| Make: | Suzuki | Kawasaki | Beta | Ducati | Kawasaki |
| Model: | GR 650 Tempter | ZX-6R | RS 500 | 125 Six Days | BJ 250 Estrella |
| Years: | 1985-89 | 2007 | 2015 | 1977-78 | 2007-10 |
| Engine: | Four stroke, parallel twin cylinders | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder | Four stroke, single cylinder, 4 valve | Two stroke, single cylinder, piston port | Four stroke, single cylinder, SOHV , 2 valves |
| Capacity: | 651 cc / 39.7 cu in | 599 cc / 36.6 cub in | 478 cc / 29.2 cu in | 123.7 cc / 7.5 cu in | 249 cc / 15.2 cu-in |
| Bore x Stroke: | 77 x 70 mm | 67 x 42.5 mm | 100 x 60.8 mm | 54 x 54 mm | 66 X 63 mm |
| Compression Ratio: | 8.7:1 | 13.9:1 | 12.1:1 | 14.6:1 | 9.0:1 |
| Cooling System: | Air cooled | Liquid cooled | Liquid cooled | Air cooled | Air cooled |
| Induction: | 2 x Mikuni carburetors | DFI® with four 38mm Keihin throttle bodies, oval sub-throttles, two injectors per throttle body | Keihin FCR-MX 39mm | Dell'Orto PHBE 32 carburetor | Carburetor |
| Ignition: | Battery powered inductive | TCBI with Digital advance | DC-CDI with variable ignition timing, Kokusan. | Motoplat electronic | CDI |
| Starting: | Electric | Electric | Electric & Kick | Kick | Electric |
| Transmission: | 5 Speed | 6 Speed | 6 Speed | 6-Speed | 5 Speed |
| Final Drive: | Chain | X-ring chain | O-ring chain, DID | Chain | Chain |
| Front Suspension: | 35mm Air assisted forks | 41 mm inverted cartridge fork with top-out springs, stepless rebound damping, stepless compression damping, fully-adjustable spring preload | Sachs USD fork, Ø 48 mm, adjustable compression and rebound, TFX technology, | 35mm Marzocchi with magnesium forks | Telescopic forks |
| Rear Suspension: | Single shock adjustable spring preload | Bottom-Link Uni-Trak® with gas-charged shock, top-out spring and pillow ball upper mount, dual-range (high/low-speed) stepless compression damping, 25-way Adjustable rebound damping, fully-adjustable spring preload | Aluminum Body Sachs shock w/adjustable rebound and hi/low speed compression | Swinging arm with dual Marzocchi shocks | Dual shocks |
| Front Brakes: | Single 260mm disc, 1 piston caliper | 2 x 300mm discs, 4 piston calipers | Single Ø 260 mm disc, 2 piston caliper | 125 mm drum | Single 300mm disc |
| Rear Brakes: | Drum | Single 210mm disc, 1 piston caliper | Single Ø 240mm disc, 1 piston caliper | 140 mm drum | Single 230mm disc |
| Front Tyre: | 100/90-19 | 120/65 ZR17 | 90/90 -21 | 3.00 x 21 | 90/90-18 51 P |
| Rear Tyre: | 130/90-16 | 180/55 ZR17 | 140/80 -18 | 4.00 x 18 | 110/90-17 60 P |
| Wheelbase: | 1430 mm / 56.3 in | 1405 mm / 55.3 in. | 1475 mm / 58.1 in | 1430 mm / 56.2 in | 1400 mm / 55.1 in |
| Seat Height: | 775 mm / 30.5 in | 820 mm / 32.3 in. | 934.7 mm / 36.8 in | 900 mm / 35.4 in | 745 mm / 29.3 in - 775 mm / 30.5 in adjustable |
| Dry Weight: | 181 kg / 399 lbs | 167 kg / 368 lbs | 111.5 kg / 246 lbs | 98 kg / 216 lbs | 142 kg / 313 lbs |
| Fuel Capacity: | 12 Litres / 3.2 US gal / 2.6 Imp gal | 17 Litres / 4.5 US gal | 7.9 L / 2.1 US gal | 8 Litres / 2.11 Us gal | 14 Litres / 3.7 US gal |