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A dirt bike built for serious off-road riding, the Trail 250 was equipped with wide-radius block-pattern tires on a light and slim body, and stood high off the ground. The elegant and functional design sealed its popularity, putting it at the vanguard of off-road models.
It featured a 5-port engine with primary kick start, and Ceriani-type front suspension.
The engine was newly designed for mass production and based on a motocross design for single-cylinder racing. Although it was a 250 cc engine, the design concept achieved a size and weight on a par with the 125 cc engine one class below it. |
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| Storage location | : | YAMAHA COMMUNICATION PLAZA (2500, Shingai, Iwata-shi, Shizuoka-ken 438-8501) | |
| Year manufactured | : | 1968 | |
| Manufacturer | : | Yamaha Motor Co., Ltd. | |
| Classification | : | Mass-production vehicle | |
| Current status | : | On public display: static | |
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| Vehicle name / Manufacture |
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| Vehicle name | : | Yamaha Trail 250 |  |
| Model | : | DT-1 | |
| Company name | : | Yamaha Motor Co., Ltd. | |
| Vehicle type/usage | : | Trail bike | |
| Location of actual vehicle/replica | : | Communication Plaza | |
| Year manufactured | : | 1968 | |
| Designed by | : | Yamaha Motor Co., Ltd. |
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| Model / Weight |
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| Style | : | Trail racing | |
| Passenger capacity | : | 2 | |
| Weight | : | 123 kg | |
| Front axle weight | : | 55 kg | |
| Rear axle weight | : | 68 kg | |
| Points of interest, topicality | : | Yamaha's first no-compromize off-road model. |
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| Body / Size |
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| Overall length | : | 2060 mm | |
| Overall width | : | 890 mm | |
| Overall height | : | 1130 mm | |
| Headlamp type | : | 6 V, 35 W | |
| Tire size (front) | : | 3.25-19-4PR | |
| Tire size (rear) | : | 4.00-18-4PR |
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| Body / Axle / Driving / Others |
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| Frame | : | Double cradle | |
| Suspension type (front) | : | Telescopic fork | |
| Suspension type (rear) | : | Swing arm | |
| Wheelbase | : | 1360 mm | |
| Brakes (front) | : | Wire internal expanding brake | |
| Brakes (rear) | : | Rod internal expanding brake | |
| Damper (front) | : | Coil spring, oil damper | |
| Damper (rear) | : | Coil spring, oil damper |
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| Engine/ Size / Power |
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| Type | : | Air-cooled 2-stroke gasoline | |
| Cylinder arrangement | : | Single cylinder | |
| Carburetor | : | VM26SH | |
| Bore x stroke | : | 70×64 | |
| Displacement | : | 246 cc | |
| Ignition system | : | Magnet ignition | |
| Max. power/r.p.m. | : | 18.5 ps/6000 rpm | |
| Lubrication method | : | Separate lubrication | |
| Start method | : | Kick type scooter | |
| Fuel tank capacity | : | 9.5 L |
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| Drive-train |
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| Transmission | : | Constant-mesh type 5 forward speeds | |
| Power transmission method | : | Gear/chain | |
| Clutch type | : | Wet multiple disc type |
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| Performance |
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| Fuel economy rating | : | 40 km/L (at 40 km/h) |
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