Yamaha TTR 250, a Japanese enduro sports bike

Yamaha TTR 250, lightweight enduro motorcycle, was produced from 1993 to 2006. It has outstanding data, thanks to which the bike became the most popular model in its segment. The absolute leader in sales is the modification of the Yamaha TTR 250 Raid, which has all the features of enduro, mountain bike and, moreover, is well suited for long trips on public roads. The motorcycle is able to travel a distance of 400 kilometers without refueling at a cruising speed of 70 km / h. On long trips, a biker needs rest, since the enduro seat is quite stiff. The maximum speed is about 120 kilometers per hour. Raid can be distinguished from other crossovers by a round headlamp.

Mountain trails

Another modification of the basic model is the Yamaha TTR 250 Open Enduro, a motorcycle in the classic off-road version. The gear ratios of the gearbox are designed for low speeds and dynamic off-road jerks. Riding along mountain trails requires good engine thrust, but the speed becomes a purely conventional factor.

Yamaha TTR 250, specifications

Overall and weight parameters:

• Total length - 1528 mm;
• Width, mm - 835;
• Height at the rudder level - 1260 mm;
• Height on the saddle line - 875 mm;
• Base wheel, center distance - 1425 mm;
• Ground clearance, clearance - 305 mm;
• Capacity of gasoline tank - 16 liters;
• Weight dry - 121 kg;
• Fuel consumption - 3.8 liters.

The motorcycle is well balanced and can move at a critically low speed without stalling. Model Yamaha TTR 250, whose characteristics are sustained at the level of the best world standards, is one of the best-selling sports bikes on the market . This is facilitated by the relatively low cost of a motorcycle.

Power point

Motorcycle Yamaha TTR 250, petrol, four-stroke:

• Type of motor - single cylinder;
• The volume of the cylinder is 248 cc / cm;
• Power close to the maximum - 30 liters. from.;
• Compression ratio - 10,4;
• Torque - 26.4 Nm at 7200 rpm;
• Stroke of the piston - 59 mm;
• The diameter of the cylinder is 73 mm;
• Food - carburettor, diffuser;
• Gas distribution - four-valve mechanism with automatic change in opening height of intake valves;
• Cooling - air;
• Transmission - a six-speed gearbox with a lever-operated footswitch;
• Clutch - multi-disk, working in an oil bath, reinforced;
• Clutch drive - flexible, rope.

Chassis

Characteristics:

• Wheel disks, the sizes - forward 3,00 / 21, back 4,60 / 18;
• Front suspension - fork, hydraulic, stroke amplitude 150 mm;
• Rear suspension - hinged, pendulum with mono-shock absorbers, working stroke 136 mm;
• Brakes - single-disk, ventilated, on both wheels.

The road version of the Yamaha TTR 250 is equipped with an electric starter with preservation of the kick starter.

Driving performance

The motorcycle is well balanced and can move at a critical low speed, without stalling. When driving in a straight line at speeds over thirty kilometers per hour, ideally keeps the road, its course stability is stable enough that it can serve as an example for any road bike. However, it is necessary to brake lightly on the bends, the passage of sharp turns is difficult because of the excessive departure of the front wheel. The angle of the plug is too high.

disadvantages

The engine of the TTR 250 has one significant drawback - it is too thin a sleeve in the cylinder. The thickness of the wall of the working part of the cylinder was reduced in order to increase the diameter of the piston and increase the volume of the combustion chamber. As a result, it turned out that the engine was afraid of cold water, or rather, its effects from the outside. On a motorcycle, you can not drive into the river and other bodies of water, as this disrupts the thermal operation of the engine. When trying to drive a ford the motor is clinching, and the piston destroys the wall of the cylinder. In this situation, the engine is overhauled.

To the disadvantages of a motorcycle can also be attributed to the instability of the exhaust pipes to corrosion. The exhaust manifold is not chrome plated and is not covered with a protective annealing layer. As a result, the metal rusts with time.

Both these shortcomings were eliminated in due time. The exhaust pipes are covered with heat-resistant molybdenum, and the liner in the engine has been abolished, the cylinder has been made all-metal, with the subsequent boring.

Restyling

Every year the motorcycle Yamaha TTR 250 passed restyling. Cardinal changes have never been, because the design of the bike is perfect. However, during the operation, small defects accumulated, which required correction. Sports motorcycles, as a rule, require special attention in terms of the strength of the rear suspension, which accounts for a significant load. And enduro bikes and even more so need to monitor the chassis. In order to avoid breakages, it is necessary to do preventive examinations on time.

Exterior remained virtually unchanged throughout the production period. And if today, buying a motorcycle from hand, the buyer will notice something that was not on the bike factory release, it means that the former owner has performed tuning and added some details from himself.