TZR 250 R 3XV1 1991

General Specification
Dimensions
	Overall length	1960 mm(77.2 in)
	Overall width	680 mm(26.8 in)
	Overall height	1075 mm(42.3 in)
	Seat height	780 mm(30.7 in)
	Wheelbase	1340 mm(52.8 in)
	Ground clearance	135 mm(5.31 in)
	Minimum turning radius	3100 mm(122.0 in)
Weight
	With oil and fuel	145.0 kg(320 lb)
	Dry (without oil and fuel)	126.0 kg(278 lb)

Maintenance Specification (Engine)
Engine
	Engine type	Liquid cooled 2-stroke
	Induction system	Reed valve
	Displacement	249.0 cm3(15.19 cu.in)
	Cylinder arrangement	V-type 2-cylinder
	Bore × stroke	56.0 x 50.7 mm(2.20 x 2.00 in)
	Compression ratio	7.50 :1
	Engine idle speed	1300 r/min
	Lubrication system	Separate lubrication (Yamaha autolube)
	Starting system	Kickstarter
Fuel
	Recommended fuel	Regular unleaded gasoline
	Fuel tank capacity	15.0 L(3.96 US gal)
	Fuel reserve amount	1.5 L(0.40 US gal)
Engine oil
Engine oil quantity
Transmission oil
	Oil change quantity	0.70 L(0.74 US qt)
	Total amount	0.75 L(0.79 US qt)
Final gear oil
Transfer gear oil
Final gear case grease
Chain drive oil
Final transmission oil
Oil pump
	Inner rotor to outer rotor tip clearance	0.04-0.09 mm(0.0016-0.0035 in)
	(Limit)	0.12 mm(0.0047 in)
	Outer rotor to pump housing clearance	0.100-0.150 mm(0.0039-0.0059 in)
	(Limit)	0.17 mm(0.0067 in)
	Pump housing to inner and outer rotor clearance	0.03-0.15 mm(0.0012-0.0059 in)
	(Limit)	0.18 mm(0.0071 in)
Transfer oil pump
Autolube pump
Cooling system
	Radiator capacity (including all routes)	1.88 L(1.99 US qt)
	Radiator cap opening pressure	75.0-105.0 kPa(0.75-1.05 kgf/cm2)(10.9-15.2 psi)
Radiator core
	Width	325.0 mm(12.80 in)
	Height	217.4 mm(8.56 in)
	Depth	16.0 mm(0.63 in)
Sub radiator core
Water pump
	Water pump type	Single suction centrifugal pump
	Reduction ratio	67/26 x 14/18 (2.004)
Spark plug(s)
	Type	BR9ECM
	Manufacturer	NGK
	Spark plug gap	0.7-0.8 mm(0.028-0.031 in)
Cylinder head
	Volume	12.30-12.90 cm3(0.75-0.79 cu.in)
	Max. warpage	0.03 mm(0.0012 in)
Camshaft
Camshaft lobe dimensions
Timing chain
Rocker arm/rocker arm shaft
Valve, valve seat, valve guide
Valve dimensions
Valve spring
Inner spring
Outer spring
Cylinder
	Bore	56.000-56.020 mm(2.2047-2.2055 in)
	Max. out of round	0.005 mm(0.0002 in)
Piston
	Piston-to-cylinder clearance	0.045-0.050 mm(0.0018-0.0020 in)
	(Limit)	0.10 mm(0.0039 in)
	Diameter D	55.952-55.967 mm(2.2028-2.2034 in)
	Height H	15.0 mm(0.59 in)
	Piston pin bore inside diameter	16.002-16.023 mm(0.6300-0.6308 in)
	(Limit)	16.030 mm(0.6311 in)
	Offset	0.50 mm(0.0197 in)
	Offset direction	Intake side
	Piston pin outside diameter	15.995-16.000 mm(0.6297-0.6299 in)
	(Limit)	15.975 mm(0.6289 in)
Piston ring
Top ring
	Ring type	Keystone
	Dimensions (B x T)	1.20 x 2.25 mm(0.05 x 0.09 in)
	End gap (installed)	0.35-0.55 mm(0.01-0.02 in)
	(Limit)	0.80 mm(0.0315 in)
	Ring side clearance	0.020-0.060 mm(0.0008-0.0024 in)
	(Limit)	0.100 mm(0.0039 in)
2nd ring
	Ring type	Plain
	Dimensions (B x T)	1.20 x 1.85 mm(0.05 x 0.07 in)
	End gap (installed)	0.30-0.50 mm(0.01-0.02 in)
	(Limit)	0.80 mm(0.0315 in)
	Ring side clearance	0.035-0.070 mm(0.0014-0.0028 in)
	(Limit)	0.10 mm(0.0039 in)
Oil ring
Connecting rod
Crankshaft
	Width A	49.95-50.00 mm(1.97-1.97 in)
	Width B	124.00 mm(4.88 in)
	Max. runout C	0.030 mm(0.0012 in)
	Big end side clearance D	0.250-0.750 mm(0.0098-0.0295 in)
	Big end radial clearance E	0.027-0.039 mm(0.0011-0.0015 in)
	Small end free play F	0.80-1.00 mm(0.03-0.04 in)
Ballancer
Clutch
	Clutch type	Wet, multiple-disc
	Clutch release method	Inner push, cam push
	Friction plate thickness	2.90-3.10 mm(0.11-0.12 in)
	Wear limit	2.80 mm(0.1102 in)
	Plate quantity	7 pcs
	Clutch plate thickness	1.90-2.10 mm(0.07-0.08 in)
	Plate quantity	6 pcs
	Max. warpage	0.05 mm(0.0020 in)
	Clutch spring free length	40.1 mm(1.58 in)
	Spring quantity	5 pcs
	Minimum length	38.0 mm(1.50 in)
	Clutch housing thrust clearance	0.140-0.260 mm(0.0055-0.0102 in)
	Clutch housing radial clearance	0.090-0.140 mm(0.0035-0.0055 in)
	Push rod bending limit	0.200 mm(0.0079 in)
Automatic centrifugal clutch
V-belt
Transmission
	Transmission type	Constant mesh 6-speed
	Primary reduction system	Spur gear
	Primary reduction ratio	67/26 (2.576)
	Secondary reduction system	Chain drive
	Secondary reduction ratio	37/14 (2.642)
	Operation	Left foot operation
Gear ratio
	1st	35/13 (2.692)
	2nd	31/16 (1.937)
	3rd	32/21 (1.523)
	4th	24/19 (1.263)
	5th	25/22 (1.136)
	6th	24/23 (1.043)
	Max. main axle runout	0.01 mm(0.0004 in)
	Max. drive axle runout	0.01 mm(0.0004 in)
Shifting mechanism
	Shift mechanism type	Shift drum and guide bar
	Max. shift fork guide bar bending	0.040 mm(0.0016 in)
Kickstarter
Decompression device
Air filter
	Air filter element	Wet element
Fuel pump
Carburetor
	Type x quantity	TM28SS x 2
	Manufacturer	MIKUNI
	ID mark	3XV 00
	Main jet	#1:#190 #2:#260
	Jet needle	#1:5FN118-3/5 #2:5FN117-3/5
	Needle jet	#1:P-8 #2:Q-0
	Pilot outlet	0.6
	Pilot jet	#15
	Bypass 1	0.9
	Valve seat size	2.8
	Starter jet 1	#25
	Power Jet	#1:#60 #2:#50
	Float height	15.0-17.0 mm(0.59-0.67 in)
	Fuel level A (using fuel level gauge)	3.5-4.5 mm(0.14-0.18 in)
	Throttle cable free play	3.0-7.0 mm(0.12-0.28 in)
Electronic fuel injection
Throttle body
Rotary valve
Reed valve
	Thickness	0.420 mm(0.0165 in)
	Valve stopper height	4.9-8.3 mm(0.19-0.33 in)
Shaft drive

Maintenance Specification (Chassis)
Chassis
	Frame type	Pressed backbone
	Caster angle	24.0 degree
	Trail	90.0 mm(3.54 in)
Front wheel
	Wheel type	Cast wheel
	Rim size	17 x MT3.00
	Rim material	Aluminum
	Wheel travel	125.0 mm(4.92 in)
	Max. radial wheel runout	2.0 mm(0.08 in)
	Max. lateral wheel runout	2.0 mm(0.08 in)
	Wheel axle bending limit	0.25 mm(0.01 in)
Rear wheel
	Wheel type	Cast wheel
	Rim size	17 x MT4.50
	Rim material	Aluminum
	Wheel travel	120.0 mm(4.72 in)
	Max. radial wheel runout	2.0 mm(0.08 in)
	Max. lateral wheel runout	2.0 mm(0.08 in)
	Wheel axle bending limit	0.25 mm(0.01 in)
Front tire
	Type	Tubeless
	Size	110/70R17 54H
	Manufacturer (front)	DUNLOP/BRIDGESTONE
	Type (front)	D202F/CY17
Rear tire
	Size	150/60R17 66H
	Manufacturer (rear)	DUNLOP/BRIDGESTONE
	Type (rear)	D202/CY20
Tire air pressure (measured on cold tires)
	Front	200 kPa(2.00 kgf/cm2)(29 psi)
	Rear	225 kPa(2.25 kgf/cm2)(33 psi)
Loading condition B
	Front	200 kPa(2.00 kgf/cm2)(29 psi)
	Rear	250 kPa(2.50 kgf/cm2)(36 psi)
Off-road riding
High-speed riding
	Front	200 kPa(2.00 kgf/cm2)(29 psi)
	Rear	250 kPa(2.50 kgf/cm2)(36 psi)
Front brake
	Type	Dual disc brake
	Operation	Right hand operation
Rear brake
	Type	Single disc brake
	Operation	Right foot operation
	Front brake lever free play	5.0-8.0 mm(0.20-0.31 in)
	Brake pedal free play	13.0-15.0 mm(0.51-0.59 in)
Front disc brake
	Disc outside diameter x thickness	282.0 x 4.0 mm(11.10 x 0.16 in)
	Max. deflection	0.30 mm(0.0118 in)
	Brake pad lining thickness-inner	5.5 mm(0.22 in)
	(Limit)	0.5 mm(0.02 in)
	Brake pad lining thickness-outer	5.5 mm(0.22 in)
	(Limit)	0.5 mm(0.02 in)
	Master cylinder inside diameter	14.0 mm(0.55 in)
	Caliper cylinder inside diameter	34.00 mm(1.34 in)
	Caliper cylinder inside diameter	27.00 mm(1.06 in)
	Recommended fluid	DOT 4
Front drum brake
Rear disc brake
	Disc outside diameter x thickness	210.0 x 5.0 mm(8.27 x 0.20 in)
	Max. deflection	0.50 mm(0.0197 in)
	Brake pad lining thickness-inner	5.5 mm(0.22 in)
	(Limit)	0.5 mm(0.02 in)
	Brake pad lining thickness-outer	5.5 mm(0.22 in)
	(Limit)	0.5 mm(0.02 in)
	Master cylinder inside diameter	12.7 mm(0.50 in)
	Caliper cylinder inside diameter	38.10 mm(1.50 in)
	Recommended fluid	DOT 4
Rear drum brake
Clutch
Steering
	Steering bearing type	Taper roller bearing
	Lock to lock angle (left)	30.0 degree
	Lock to lock angle (Right)	30.0 degree
No./size of steel balls
Front suspension
	Type	Telescopic fork
	Spring/shock absorber type	Coil spring/oil damper
	Front fork travel	125.0 mm(4.92 in)
	Fork spring free length	364.0 mm(14.33 in)
	(Limit)	356.0 mm(14.02 in)
	Collar length	266.5 mm(10.49 in)
	Spring rate (K 1)	9.80 N/mm(1.00 kgf/mm)(55.96 lb/in)
	Spring stroke (K 1)	0.0-125.0 mm(0.00-4.92 in)
	Optional spring available	No
	Recommended oil	Suspension oil "01" or equivalent
	Quantity	357.0 cm3(12.07 US oz)
	Level	116.0 mm(4.57 in)
	Inner tube outer diameter	39.0 mm(1.54 in)
Rear suspension
	Type	Swingarm (link suspension)
	Spring/shock absorber type	Coil-gas spring/oil damper
	Rear shock absorber assembly travel	48.0 mm(1.89 in)
	Spring free length	160.0 mm(6.30 in)
	Installed length	146.0 mm(5.75 in)
	Spring rate (K 1)	91.20 N/mm(9.30 kgf/mm)(520.75 lb/in)
	Spring stroke (K 1)	0.0-48.0 mm(0.00-1.89 in)
	Optional spring available	No
	Enclosed gas/air pressure (STD)	1000 kPa(10.0 kgf/cm2)(142.2 psi)
	(Min.-max.)	950-1050 kPa(9.5-10.5 kgf/cm2)(135.1-149.3 psi)
Swingarm
	Free play limit(at the end of the swingarm)-radial	1.0 mm(0.04 in)
	Free play limit(at the end of the swingarm)-axial	0.2 mm(0.01 in)
Drive chain
	Type/manufacturer	520V2/DAIDO
	Link quantity	110
	Drive chain slack	30.0-40.0 mm(1.18-1.57 in)

Maintenance Specification (Electrical)
	System voltage	12 V
Ignition system
	Ignition system	C.D.I.
	Ignition timing (B.T.D.C.)	21.0 degree/1300 r/min
	Advancer type	Electrical
C.D.I.
	Pickup coil resistance	230.0 ohm+-20 %W/L-W/B
	Pickup coil resistance	230.00 ohm+-20 %W/G-W/B
	C.D.I. unit model/manufacturer	TQCA26/DENSO
DC. C.D.I.
Transistorized coil ignition
Ignition coil
	Model/manufacturer	TJ0279,TJ0280/DENSO
	Primary coil resistance	0.16 ohm+-15 %
	Secondary coil resistance	6.2 K.ohm+-20 %
Spark plug cap
	Material	Rubber
	Resistance	5.0 K.ohm
A.C. magneto
	Model/manufacturer	TLKZ19/DENSO
	Standard output	14.0 V15.5 A5000 r/min
	Stator coil resistance	0.50 ohm+-20 %W-W
A.C. generator
Flywheel magneto
Rectifier/regulator
	Model/manufacturer	SH569/SHINDENGEN
	No load regulated voltage	14.3-15.3 V
Rectifier
	Rectifier capacity	25.0 A
	Withstand voltage	200.0 V
Battery
	Model	GT4B-5
	Voltage, capacity	12 V, 2.6 Ah
	Specific gravity	1.280
Headlight
	Headlight type	Bulb type
	Bulb type	Halogen bulb
Bulb voltage, wattage x quantity
	Headlight	12 V60/55 W
	Tail/brake light	12 V5/21 W
	Flasher light	12 V10.0 W x 4 pcs
	Meter light	12 V1.7 W x 4 pcs
Indicator light
	Neutral indicator light	12 V3.4 W x 1 pcs
	Turn indicator light	12 V3.4 W x 1 pcs
	Oil level indicator light	12 V3.4 W x 1 pcs
	High beam indicator light	12 V1.7 W x 1 pcs
	Speed warning indicator light	12 V3.4 W x 1 pcs
Electric starting system
Starter motor
Starter switch
Starter relay
Horn
	Horn type	Plane
	Quantity	1 pcs
	Model/manufacturer	GF-12/NIKKO
	Max. amperage	1.5 A
Turn signal relay
	Relay type	Semi transistor
	Model/manufacturer	RFB279/DENSO
	Self cancelling device built-in	No
	Turn signal blinking frequency	60.0-120.0 cyl/min
	Wattage	10 W x 2.0 +3.4 W
Hazard flasher relay
Self cancelling unit
Oil level gauge
	Model/manufacturer	3XV/ASTI
Fuel gauge
Fuel meter
Starting circuit cut-off relay
Stop light relay
Headlight relay
Side stand relay
Grip warmer
Fuel pump relay
Radiator fan
Fan motor relay
Thermostat switch
Thermostat
	Type/manufacturer	47X/NIPPON THERMOSTAT
	Valve opening temperature	63.0-67.0 degree C(145.40-152.60 degree F)
	Valve full open temperature	80.0 degree C(176.00 degree F)
	Valve lift-full open	7.0 mm(0.28 in)
Thermo unit
	Model/manufacturer	2YK/NIPPON SEIKI
Servo motor
Smoothing condenser
Fuse
Fuses
	Main fuse	20.0 A/1 pcs
	Reserve fuse	20.0 A/1 pcs