Yamaha DT125X

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Yamaha DT 125X
Production 2004
Class Supermotard
Air Cooled, 2 Stroke, Single Cylinder
Bore / Stroke 55.9mm x 55.9mm
Compression ratio 6.7:1
Horsepower 15.02 HP (11.2 KW) @ 8000RPM
Torque 10.33 ft/lbs (14.0 Nm) @ 8000RPM
Transmission Gear box: 6 Speed

Final Drive: Chain

Clutch: Wet multi-plate
Suspension Front: Telescopic Fork
Rear: Monocross With Linkage
Brakes Front: Disc
Rear: Disc
Front Tire 120/70-17
Rear Tire 140/60-17
Wheelbase 50.0 inches (1270 mm)
Seat Height 34.88 inches (886 mm)
Weight 127.0 kg (wet)
Recommended Oil Yamalube 10w-40
Manuals Service Manual

The Yamaha DT 125X was a Air Cooled, 2 Stroke, Single Cylinder Supermotard motorcycle produced by Yamaha in 2004. Max torque was 10.33 ft/lbs (14.0 Nm) @ 8000 RPM. Claimed horsepower was 15.02 HP (11.2 KW) @ 8000 RPM.

Engine[edit | edit source]

A 55.9mm bore x 55.9mm stroke result in a displacement of just 124.0 cubic centimeters.

Drive[edit | edit source]

The bike has a 6 Speed transmission. Power was moderated via the Wet multi-plate.

Chassis[edit | edit source]

It came with a 120/70-17 front tire and a 140/60-17 rear tire. Stopping was achieved via Disc in the front and a Disc in the rear. The front suspension was a Telescopic Fork while the rear was equipped with a Monocross With Linkage. The wheelbase was 50.0 inches (1270 mm) long.

2004 - 2007 Yamaha DT 125X[edit | edit source]

2004 - 2007 Yamaha DT 125X

The Yamaha DT 125X's proven two stroke single’s been driving these little motorcycles around for donkey’s years. Simplistic but it does the job.