AJS YX-R-125: history, specs, pictures

The AJS YX-R-125 was a single cylinder, four-stroke standard produced by AJS in 2008.

AJS YX-R-125
Production 2008
single cylinder, four-stroke
Bore / Stroke 57.0mm x 48.8mm
Fuel System injection
Ignition coil cdi
Transmission Gear box: 5-speed

Final Drive: chain

Clutch: wet, multiplate
Brakes Front: single disc
Rear: expanding brake (drum brake)
Wheelbase 56.46 inches (1434 mm)
Seat Height 34.06 inches (865 mm)
Weight 275.58 pounds (125.0 Kg) (dry),
Fuel Capacity 2.11 Gallon (8.00 Liters)
Manuals Service Manual


The engine was a air cooled single cylinder, four-stroke. A 57.0mm bore x 48.8mm stroke result in a displacement of just 124.0 cubic centimeters.


The bike has a 5-speed transmission. Power was moderated via the wet, multiplate.


Stopping was achieved via single disc in the front and a expanding brake (drum brake) in the rear. The YX-R-125 was fitted with a 2.11 Gallon (8.00 Liters) fuel tank. The bike weighed just 275.58 pounds (125.0 Kg). The wheelbase was 56.46 inches (1434 mm) long.