Yamaha TTR 250, a Japanese-made enduro sports bike

2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:42

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

Mountain trails

Another modification of the base model is the Yamaha TTR 250 Open Enduro, a classic off-road bike. The gear ratios of the gearbox are designed for low speeds and dynamic off-road jerks. Riding on mountain trails requires good engine traction, but speed becomes a purely conditional factor.

Yamaha TTR 250 specifications

Dimensional and weightOptions:

• full length - 1528mm;
• width, mm - 835;
• height at handlebar level - 1260mm;
• height along the saddle line - 875 mm;
• wheel base, center distance - 1425 mm;
• ground clearance, clearance - 305 mm;
• gas tank capacity - 16 liters;
• weight dry- 121kg;
• fuel consumption - 3.8 liters.

The bike is well balanced and can move at critically low speeds without stalling. The Yamaha TTR 250 is one of the best-selling sports bikes on the market with its performance to the highest world standards. This is facilitated by the relatively low cost of the motorcycle.

Powerplant

Yamaha TTR 250 motorcycle engine, gasoline, four-stroke:

• motor type - single cylinder;
• cylinder capacity - 248 cc;
• power close to maximum - 30 hp p.;
• compression ratio - 10, 4;
• torque - 26.4 Nm at 7200 rpm;
• stroke - 59mm;
• cylinder diameter - 73 mm;
• food - carburetor, diffuser;
• gas distribution - four-valve mechanism with automatic change in the opening height of the intake valves;
• cooling - air;
• transmission - six-speed gearbox with lever foot shift;
• clutch - multi-disc, working in an oil bath, reinforced;
• clutch drive - flexible, cable.

Chassis

Features:

• rims, sizes - front 3, 00/21, rear 4, 60/18;
• front suspension - fork, hydraulic, travel 150 mm;
• rear suspension - articulated, swingarm with monoshock absorbers, travel 136 mm;
• brakes - single disc, ventilated, on both wheels.

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

Rideability

The bike is well balanced and can move at critically low speed without stalling. When driving in a straight line at speeds over thirty kilometers per hour, it holds the road perfectly, its directional stability is so stable that it can serve as an example for any road bike. However, when cornering, you have to slow down slightly, the passage of sharp turns is difficult due to too much reach of the front wheel. Fork angle too high.

Flaws

The engine of the TTR 250 bike has one significant drawback - it is too thin a sleeve in the cylinder. The wall thickness 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 motor began to be afraid of cold water, or rather, its impact from the outside. On a motorcycle, you can not drive into the river and other bodies of water, as this violates the thermal regime of the engine. When trying to pass the ford, the motor wedges, and the piston destroys the cylinder wall. In this situation, engine overhaulsecured.

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

Both of these shortcomings were eliminated in due time. The exhaust pipes are covered with heat-resistant molybdenum, and the sleeve in the engine was abolished, the cylinder began to be made all-metal, with subsequent boring.

Restyling

The Yamaha TTR 250 has been restyled every year. There has never been a major change, as the design of the bike is perfect. However, during the operation accumulated minor flaws that required correction. Sport bikes usually require special attention in terms of the strength of the rear suspension, which carries a significant load. And enduro bikes even more so need to monitor the chassis. In order to avoid breakdowns, it is necessary to do preventive examinations in time.

The exterior remained virtually unchanged throughout the production period. And if today, when purchasing a motorcycle from hand, the buyer notices something that was not on the factory-made bike, it means that the previous owner carried out tuning and added some details from himself.