The Honda RS125R was a 125 cc two-stroke Grand Prix racing motorcycle manufactured by Honda Racing Corporation for racing purposes only.[1]

Honda RS125R
ManufacturerHonda Racing Corporation
Production1980–2011
PredecessorHonda MT125R
SuccessorHonda NSF250R
Engine124.8 cc (7.62 cu in) two-stroke single
Bore / stroke54 mm × 54.5 mm (2.13 in × 2.15 in)
Power32.3 kW (43.3 hp) @ 12,250 rpm
Transmissionconstant-mesh sequential manual

It debuted in 1980, racing in the All Japan Road Race Championship.

In 1987 a redesigned version was entered in the World Championship ridden by Ezio Gianola; since 1988 the new bikes were manufactured also for customer teams.

The Honda RS125R has won nine World Championship titles for riders, with Loris Capirossi, Dirk Raudies, Haruchika Aoki, Emilio Alzamora, Dani Pedrosa, Andrea Dovizioso and Thomas Lüthi, while Honda was crowned Constructors' World Champion eleven times.

1995 Honda RS125R specifications

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Model RS125R
Type JR01
Length × width × height 1800 mm × 570 mm × 995 mm
Wheelbase 1215 mm
Ground clearance 110 mm
Seat height 700 mm
Caster angle 23° 30'
Weight (semi dry) 71.5 kg
Engine type Liquid cooled two stroke single
Displacement 124 cc
Bore and stroke 54 × 54.5 mm
Max power
  • 32.3 / 12250 (kw/RPM)
  • [44/12250] (ps/RPM)
Max torque
  • 24.5 / 12255 (Nm/RPM)
  • [2.5 / 12250] (kgf•m/RPM)
Carburetor Keihin PJ35 (TH sensor & PWJ)
Ignition Digital CDI
Transmission 6-speed constant-mesh sequential manual
Clutch Wet multi-plate
Fuel tank capacity 14 liter
Engine oil capacity 0.5 liter
Frame type Aluminum twin-tube
Brake
  • Front : 296 mm single disc
  • Rear : 186 mm single disc
Wheel
  • Front : 2.50-17
  • Rear : 3.50-17
Suspension

References

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