Yamaha SR250: review, history, specs

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Yamaha SR250
Also called SR250 Custom, Exciter
Production 1978 - 1983
Class Classic
single cylinder, four-stroke
Bore / Stroke 73.5mm x 56.5mm
Compression ratio 8.9:1
Top Speed 71 mph (115 km/h)
Horsepower 16.63 HP (12.4 KW) @ 7400RPM
Torque 14.01 ft/lbs (19.0 Nm) @ 7000RPM
Spark Plug NGK BP7ES '80-82
Battery YUASA 12N12A-4A-1 '80-82
Transmission Gear box: 5-speed

Final Drive: chain

Clutch: Wet multi-plate
Final Drive Chain: 520 `80-82[1]
Suspension Front: Telescopic Forks
Rear: Dual Shock
Brakes Front: expanding brake
Rear: expanding brake
Front Tire 3.00-19
Rear Tire 120/90-16
Wheelbase 52.8 inches (1341 mm)
Seat Height 29.09 inches (739 mm)
Weight 135.0 kg (wet)
Oil Filter K&N KN-145
Recommended Oil Yamalube 10w-40
Fuel Capacity 2.64 Gallon (10.00 Liters)
Related Yamaha XT250
Manuals Service Manual

The Yamaha SR250SE was a single cylinder, four-stroke Classic motorcycle produced by Yamaha between 1978 and 1983. It could reach a top speed of 71 mph (115 km/h). Max torque was 14.01 ft/lbs (19.0 Nm) @ 7000 RPM. Claimed horsepower was 16.63 HP (12.4 KW) @ 7400 RPM.

Engine[edit | edit source]

The engine was a air cooled single cylinder, four-stroke. A 73.5mm bore x 56.5mm stroke result in a displacement of just 240.0 cubic centimeters. Fuel was supplied via a overhead cams (OHC).

Drive[edit | edit source]

The bike has a 5-speed transmission. Power was moderated via the Wet multi-plate.

Chassis[edit | edit source]

It came with a 3.00-19 front tire and a 120/90-16 rear tire. Stopping was achieved via expanding brake in the front and a expanding brake in the rear. The front suspension was a Telescopic Forks while the rear was equipped with a Dual Shock. The SR250SE was fitted with a 2.64 Gallon (10.00 Liters) fuel tank. The wheelbase was 52.8 inches (1341 mm) long.

1978 - 1982 Yamaha SR 250[edit | edit source]

The Yamaha SR 250 has the same engine from XT250, single side drum front brake and some other components, such as the sanil-type rear chain adjuster, showed similar trail antecedents.

1982[edit | edit source]

In Media[edit | edit source]

References[edit | edit source]

  1. 2019 Western Power Sports Catalog. Western Power Sports. 2019.