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

**

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

**

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	–

**

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	–

**

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

**

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	–

**

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]