Model Name:RZ250

Manufacturer:YAMAHA

Model Year:1980

It had renewed its traditional air-cooled parallel twin engine that had been cherished by the RD series. It was the first road sport model to adopt a monocross suspension, and became a true replica model of the TZ racer. The power characteristic that blew up in two stages attracted the fans, and made a resurgence in the popularity of the 2-stroke sports motorcycle.

Specifications:

[Basic spec]

Manufacturer	YAMAHA	Engine Type	Water-Cooled 2 Stroke Piston Reed Valve Parallel 2 Cylinder
Model Name	RZ250	Starter	Kick Starter
Grade	–	Maximum Output (ps)	35ps(26kw)/8500rpm
Drive Train	–	Maximum Torque (kgf/m)	3kg-m(29.4N-m)/8000rpm
Model Type	4L3	Curb Weight	157
Displacement	247	Dry Weight	139
Sales Launch Year	1980/0	Fuel Efficiency by Catalog	–
Height/Width/Length	1085/170/2080	Fuel Tank Capacity	16.5
Seat Height	790	Distance to Empty	–
Front Tire Indication	3.00-18 4PR WT	Fuel Supply	Carburetor
Rear Tire Indication	3.50-18 S 4PR WT

[Service data]

Standard Plug	B8ES	Chain Size	530
Number of Used Plugs	2	Chain Link Number	102
Engine Oil Amount	–	Battery Code	12N5.5-3B
Engine Oil (Refill)	1.5L	Headlight	12V 60w/55w
Engine Oil (Element Replacement)	–	Headlight Type	H4
Front Blinker Rating	12V 10w	Headlight Remarks	–
Drive Sprocket Teeth Number	16	Tail Light Rating	12V 21w/5w
Driven Sprocket Teeth Number	41	Rear Blinker Rating	12V 10w

[Machine detail]

Motor Model Code	4L3	Caster Angle	26.5 Degrees
Bore (mm)	54	Trail (mm)	101
Storke (mm)	54	Minimum Ground Clearance	170
Compression Ratio	6.2	Distance Between Axes	1355
Ignition Method	–	Streering Angle (Right)	39.5
Engine Lubrication Type	–	Turning Angle (Left)	39.5
Frame Type	Steel Pipe Double Cradle	Mirror Screw Hole Diameter	–
Minimum Rotaion Radius	–	Fuel Tank Reserve Capacity	–

[Underbody detail]

Front Brake Type	Single Disc	Suspension Type (Rear)	Swing Arm
Front Brake Remarks	–	Number of Rear Shock Absorbers	2
Rear Brake Type	Drum	Rear Suspension Stroke	–
Rear Brake Remarks	–	Rear Wheel Travel	–
Suspension Type (Front)	Telescopic	ABS	–
Front Fork Type	–	Drive Train	Chain
Front Suspension Stroke	140	Differential Oil Amount	–
Front Fork Diameter	–	Chain Remarks	–

[Equipment]

Seat Lowering Allowance	–	Theft Prevention Device	–
Mirror Screw Hole Diameter	–	Tail Light Bulb Type	S25
Mirror Remarks	–	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	–	Idling Initial Value (rpm)	120(rpm)
Number of Gears	6	Needle Steps (Clip Location)	3
Gear Ratio	–	Float Level (mm)	21
Primary Reduction Ratio	2.87	Air Screw Return	1.5
Secondary Reduction Ratio	2.571	Main Jet Type	MIKUNI Hex Large
Variable Speed Vehicle Gear Ratio	–	Main Jet Number	#185
Tappet Clearance (mm) IN	–

[Other spec]

Clutch Cable Length	970	Rear Brake Cable Length	–
Choke Cable Length	–	Other Cables	800
Meter Cable Length	–	Engine Number (Production Launch)	–
Throttle Cable Length	1130	Engine Number (Production End)	–
Front Brake Cable Length	800

[See Moto Index of YAMAHA]
[See Accessories for YAMAHA RZ250]