| MODEL | YAMAHA TZR 125SP 1992 |
| Year | 1992 |
| Engine Type | Two stroke, single cylinder, reed valve |
| Displacement / Capacity | 124 cc / 7.6 cu in |
| Bore X Stroke | 56.4 x 50 mm |
| Compression Ratio | 5.9:1 |
| Cooling System | Liquid cooled |
| Max Power | 38 hp / 28.3 kW @ 11000 rpm |
| Max Torque | 17.2 Nm / 13 lb-ft @ 10000 rpm |
| Ignition | CDI |
| Induction | 32 mm Dell'Orto carburetor |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6 Speed |
| Clutch | Wet plate |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | 39 mm upside-down forks |
| Rear Suspension | Monoshock, adjustable preload, 120 mm / 4.5 in travel |
| Front Brakes | Single disc, 4 piston caliper |
| Rear Brakes | Single disc, 2 piston caliper |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 121 kg / 266.7 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 110/70-17 |
| Rear Tyre | 140/70-17 |
| FUEL SYSTEM | |
| Fuel Capacity | 15 Litres / 3.1 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The TZR125SP was a limited-production Belgarda special built in Italy on the first R-series (4DL) TZR125. It had extra cylinder porting and a dedicated CDI for more power, along with adjustable forks. Production was small and individually numbered, making it a collector's item among 125 two-strokes.
