Yamaha TDR 250 (1990-91) vs Yamaha TT 600 (1988-90)
Comparison technical specifications
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| Make: | Yamaha | Yamaha |
| Model: | TDR 250 | TT 600 |
| Years: | 1990-91 | 1988-90 |
| Engine: | Two stroke, parallel twin cylinder, read valve, YPVS | Four stroke, single cylinder, SOHC, 4 Valve |
| Capacity: | 249 cc / 15.2 cu-in | 595 cc / 36.5 cu-in |
| Bore x Stroke: | 56.4 х 50 mm | 95 x 84 mm |
| Cooling System: | Liquid cooled | Air cooled |
| Compression Ratio: | 5.9:1 | 8.5:1 |
| Lubrication: | Autolube | Dry sump |
| Induction: | 2x 28mm TM28SS Mikuni carburetors | 27mm Dual stage Teikei Y27PVX1 carburetor |
| Ignition: | Transistorized | CDI |
| Starting: | Kick | Kick |
| Max Power: | 46 hp / 37 kW @ 10000 rpm | 45 hp / 34 kW @ 6500 rpm |
| Max Torque: | 3.7 kgf-m / 26.7 lb-ft @ 8500 rpm | 50 Nm / 4.7 kgf-m @ 5500 rpm |
| Transmission: | 6 Speed | 5 Speed |
| Final Drive: | Chain | Chain |
| Front Suspension: | Air assisted telescopic forks 7-way adjustable preload | 43mm Telescopic forks |
| Rear Suspension: | Single shock rising rate adjustable preload | Alloy swinging arm single shock with adjustable dampers. |
| Front Brakes: | Single 320mm disc 2 piston calipers | Single 310mm disc |
| Rear Brakes: | Single 210mm disc single piston caliper | Single 270mm disc |
| Front Tyre: | 110/90-18 | 3.00-21 |
| Rear Tyre: | 120/80-17 | 4.60-18 |
| Seat Height: | 820 mm / 32.2 in | 935 mm / 36.8 in |
| Dry Weight: | 137 kg / 302 lbs | 138 kg / 304.2 lbs |
| Fuel Capacity: | 14 Litres / 3.6 US gal | 13 Litres / 3.4 US gal |
| Braking 60 - 0 / 100 - 0: | 14.0 m / 38.7 m | 16.6 m / 49.8 m |
| Standing ¼ Mile: | 13.6 sec / 152.8 km/h | 13.8 sec / 144.2 km/h |
| Top Speed: | 175 km/h | 146.4 km/h |