Yamaha RZ125S

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Yamaha RZ125S
Manufacturer
Production 1983 - 84
Engine
Two stroke, single cylinder
Compression ratio 6.4:1
Top Speed 81 mph / 130.3 km/h
Ignition Hitachi CDI
Transmission 6 Speed
Suspension Front: 32mm Telescopic forks
Rear: Monocross linkage 6-way preload adjustment
Brakes Front: Single 245mm disc
Rear: 130mm Drum
Front Tire 2.75-18-4PR
Rear Tire 3.00-18-6PR
Wheelbase 1295 mm / 50.9 in
Seat Height 775 mm / 30.5 in
Weight 98 kg / 216 lbs (dry),
Oil Capacity 1.1 L
Recommended Oil Yamalube 10w-40
Fuel Capacity 13 Liters / 3.4 US gal
Manuals Service Manual


It could reach a top speed of 81 mph / 130.3 km/h.

Engine[edit | edit source]

The engine was a Liquid cooled cooled Two stroke, single cylinder. The engine featured a 6.4:1 compression ratio.

Chassis[edit | edit source]

It came with a 2.75-18-4PR front tire and a 3.00-18-6PR rear tire. Stopping was achieved via Single 245mm disc in the front and a 130mm Drum in the rear. The front suspension was a 32mm Telescopic forks while the rear was equipped with a Monocross linkage 6-way preload adjustment. The RZ125S was fitted with a 13 Liters / 3.4 US gal fuel tank. The bike weighed just 98 kg / 216 lbs. The wheelbase was 1295 mm / 50.9 in long.

Photos[edit | edit source]

Yamaha RZ125S

Overview[edit | edit source]

Yamaha RZ 125S








Make Model Yamaha RZ 125S
Year 1983 - 84
Engine Type Two stroke, single cylinder
Displacement 123 cc / 7.5 cu-in
Bore X Stroke 56 х 50 mm
Cooling System Liquid cooled
Compression 6.4:1
Lubrication Autolube
Oil Capacity 1.1 L
Induction 24mm Mikuni carburetors
Ignition Hitachi CDI
Starting Kick
Max Power 20 hp / 15.5 kW @ 9500 rpm
Max Torque 1.6 kgf-m / 16 Nm @ 9250 rpm
Transmission 6 Speed
Final Drive Chain
Front Suspension 32mm Telescopic forks
Rear Suspension Monocross linkage 6-way preload adjustment
Front Brakes Single 245mm disc
Rear Brakes 130mm Drum
Front Tire 2.75-18-4PR
Rear Tire 3.00-18-6PR
Dimensions Length 1990 mm / 78.3 in Width 735 mm / 28.9 in Height 1190 mm / 46.8 in
Wheelbase 1295 mm / 50.9 in
Seat Height 775 mm / 30.5 in
Ground Clearance 185 mm / 7.2 in
Dry Weight 98 kg / 216 lbs
Fuel Capacity 13 Liters / 3.4 US gal
Consumption Average 64 mpg
Standing ¼ Mile 16.7 sec
Top Speed 81 mph / 130.3 km/h