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 Yamaha - DT R & E
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Yamaha D2-492-32-17
Photo ou archives : F-M. Dumas

Capacity : 125
Model : DT R & E
Production : 1985 - 1993
Category : (On-Off) Dual Purpose


125 DTR · 1988

A real step forward

Yamaha has always been a leader in the field of trail bikes. Following its first model of this kind, the 250 DT1 of 1970, the XT 500 unleashed an amazing craze, and the successive versions of the DT 125 broke many sales records over the years.

Van de Berk Replica

Bit by bit, the original DT concept benefitted from the lessons learned in competition and - from the stylistic point of view as well as the engineering aspect - became more and more inspired by motocross models. Yamaha rider Van de Berk dominated 125cc motocross in 1987, and new heights were reached with this 125 DTR. Its engine, derived from the road-going TZR, is a compact unit-constructed two-stroke with liquid cooling. The unusual feature was the automatic intake valves mounted directly on the crankcase. The carburetor benefits from a YEIS intake control system and - as a supreme refinement- the DTR is fitted with a rotary valve on the exhaust.

Real Performance Improvement

This permits a genuine improvement in performance by matching the exhaust timing to the engine regime. This system will be seen more often on all the modern high-performance two-strokes. The technologically-minded were delighted; off-roaders were ecstatic, for the DTR also represented real progress in handling. Its classic frame has generous suspension travel, a Monocross layout with bellcranks at the rear and a single damper and a front fork with massive 1.6 inch tubes.


Engine: 124cc (565x50mm) water-cooled single-cylinder

Power Rating: 21.3 hp @ 7000 rpm

Valves: two-stroke; automatic intake valves on crankcase; rotary exhaust

Fuel System: 26mm carburetor

Transmission: 6-speed, chain final drive

Suspension: telescopic forks (front); Monocross (rear); travel 10.6/ 5.1 inches

Brakes: disc (front); drum (rear)

Wheels: wire; 21 inch (front); 18 inch (rear)

Weight: 236 lb

Maximum Speed: 77 mph


With its generous suspension tmvel, the little 125 DTR benefits from the hard-won lessons of competitive use.


Motorcycle encyclopedia Moto Passion, realised by François-Marie Dumas, include almost 2000 photos presented with an exhaustive history of the motorcycles exhibited.

This unique collection has been realised with the participation of many specialists. With many thanks in particular to Yves Campion, Michael Dregni, Didier Ganneau, Jean Goyard, Helmut Krackowizer, Michel Montange, Christian Rey, Bernard Salvat, Mick Woollett, etc

One can order here

  • Original cards on paper (in french)
  • High resolution scans or original documents presented and signed with my name.

Please contact me at for conditions and copyright.

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François-Marie Dumas

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