Model Name:R1-Z
Manufacturer:YAMAHA
Model Year:1990
In the days of 1990, racer replica models were in their heydays, and all manufacturers were competing over the performance level of their products. The design of this 2-stroke 250cc street naked bike, on the other hand, placed its value on the joy of ride, the comprehensive usability, and its maneuverability.
It mounted the engine, based on the ones for the initial TZR, on its newly designed truss structured diamond frame. The exhaust pipes of the carbon silencer chamber were crossed to optimize the expansion chamber while securing the banking angle.
While other motorcycles with 2-stroke engines withdrew the market because of the environmental problem aroused in the 1990s, this R1-Z still underwent a minor change and remained in the market. It was put on sale until 1999, when all manufacturers halted the production of the 2-stroke 250cc motorcycles all together.
Specifications:
[Basic spec]
| Manufacturer | YAMAHA | Engine Type | 2 Cycle Water-Cooled Crankcase Reed Valve |
|---|---|---|---|
| Model Name | R1-Z | Starter | Kick Starter |
| Grade | – | Maximum Output (ps) | 45ps(33kw)/9500rpm |
| Drive Train | – | Maximum Torque (kgf/m) | 3.7kg-m(36.3N-m)/8500rpm |
| Model Type | 3XC | Curb Weight | 152 |
| Displacement | 249 | Dry Weight | 133 |
| Sales Launch Year | 1990/0 | Fuel Efficiency by Catalog | 34.0 km/L (at 50 km/h) |
| Height/Width/Length | 1040/-/2005 | Fuel Tank Capacity | 16 |
| Seat Height | 775 | Distance to Empty | – |
| Front Tire Indication | 110/70-17 54H TL | Fuel Supply | Carburetor |
| Rear Tire Indication | 140/70-17 66H TL |
[Service data]
| Standard Plug | BR9ES | Chain Size | 520 |
|---|---|---|---|
| Number of Used Plugs | 2 | Chain Link Number | 114 |
| Engine Oil Amount | 1.2 | Battery Code | FT4L-BS |
| Engine Oil (Refill) | 1L | Headlight | 12V 60w/55w |
| Engine Oil (Element Replacement) | – | Headlight Type | H4 |
| Front Blinker Rating | 12V 10w | Headlight Remarks | – |
| Drive Sprocket Teeth Number | 14 | Tail Light Rating | 12V 21w/5w |
| Driven Sprocket Teeth Number | 45 | Rear Blinker Rating | 12V 10w |
[Machine detail]
| Motor Model Code | 3XC | Caster Angle | 24.5 Degrees |
|---|---|---|---|
| Bore (mm) | 56.4 | Trail (mm) | 92 |
| Storke (mm) | 50 | Minimum Ground Clearance | – |
| Compression Ratio | 6.4 | Distance Between Axes | 1380 |
| Ignition Method | C.D.I. Magnet Ignition | Streering Angle (Right) | – |
| Engine Lubrication Type | Separate Lubrication Type | Turning Angle (Left) | – |
| Frame Type | Double Cradle | Mirror Screw Hole Diameter | 10mm |
| Minimum Rotaion Radius | 2.8 | Fuel Tank Reserve Capacity | – |
[Underbody detail]
| Front Brake Type | Double Disc | Suspension Type (Rear) | – |
|---|---|---|---|
| Front Brake Remarks | – | Number of Rear Shock Absorbers | – |
| Rear Brake Type | Disc | Rear Suspension Stroke | – |
| Rear Brake Remarks | – | Rear Wheel Travel | – |
| Suspension Type (Front) | – | ABS | – |
| Front Fork Type | – | Drive Train | – |
| Front Suspension Stroke | – | Differential Oil Amount | – |
| Front Fork Diameter | – | Chain Remarks | – |
[Equipment]
| Seat Lowering Allowance | – | Theft Prevention Device | – |
|---|---|---|---|
| Mirror Screw Hole Diameter | 10mm | Tail Light Bulb Type | S25 |
| Mirror Remarks | Use screw type mirror or reverse screw adapter. | Tail Light Base Shape | BAY15D |
| Electronic Device Remarks | – | Tail Light Base Shape 2 | – |
| Fuel Gauge | – | Tail Light Remarks | Glass Shape G18 Also Installable |
| Clock | – | Front Blinker Bulb Type | G18 |
| Hazard | – | Front Blinker Base Shape | BA15S/BA15S |
[Engine detail]
| Clutch Type | – | Tappet Clearance (mm) EX | – |
|---|---|---|---|
| Transmission | 6-Stage Normal Shift | Idling Initial Value (rpm) | – |
| Number of Gears | – | Needle Steps (Clip Location) | – |
| Gear Ratio | 2.333 / 1.647 / 1.315 / 1.083 / 0.961 / 0.875 | Float Level (mm) | – |
| Primary Reduction Ratio | 2.545 | Air Screw Return | – |
| Secondary Reduction Ratio | 3.214 | Main Jet Type | MIKUNI Hex Large |
| Variable Speed Vehicle Gear Ratio | – | Main Jet Number | #230 |
| Tappet Clearance (mm) IN | – |
[Other spec]
| Clutch Cable Length | 900 | Rear Brake Cable Length | – |
|---|---|---|---|
| Choke Cable Length | – | Other Cables | – |
| Meter Cable Length | – | Engine Number (Production Launch) | – |
| Throttle Cable Length | 910 | Engine Number (Production End) | – |
| Front Brake Cable Length | – |
[See Moto Index of YAMAHA]
[See Accessories for YAMAHA R1-Z]