Yamaha - SR 250 SE 81

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Bike Info

CC:
250
SR 250 SE Parts and accessories

Service

Chain Freeplay mm:
25-35mm (1.0-1.4")
Engine Oil Grade SAE:
20w40
Engine Oil quantity (litres):
1.3
Engine Oil quantity with filter (litres):
1.6
Fork oil grade:
10 wt
Front Fork Oil cc (left leg):
168
Front Fork Oil cc (right leg):
168
Spark Plugs Gap (mm):
0.7-0.8mm (0.028-0.031in) (14.5ftlb torque)
Tyre Pressure Back Bar / psi:
28psi
Tyre Pressure Back - Pillion Bar / psi:
32psi
Tyre Pressure Front Bar / psi:
26psi
Tyre Pressure Front - Pillion Bar / psi:
28psi
Valve Clearance Cold - Exhaust:
0.12-0.17
Valve Clearance Cold - Inlet:
0.05-0.10

Brakes

Front:
Drum
Rear:
Drum

Dimensions

Dry Weight:
121 kg
Fuel Capacity:
10.7 litres/2.8 gal.
Ground Clearance:
145mm
Height:
1125mm
Length:
2005mm
Reserve Fuel Capacity:
1.3 litres/0.3 gal
Trail:
121 mm
Wet Weight:
130 kg
Wheelbase:
1335mm
Width:
815mm

Electrics

Voltage:
12v
Battery:
12N-12A-4A
Bulb-Headlight:
12v 35/50w sealed beam
Ignition:
Full transistor ignition
Spark Plugs:
NGK BP7ES or N.Denso W22EP

Engine

Type:
Air Cooled 4 Stroke SOHC Straight Single
Bore x Stroke:
73.5 x 56.5 mm
Carburation:
Mikuni BS34
Compression Ratio:
9.2:1
Displacement:
240 cc
Lubrication System:
No. of Valves:
2
Starting:
electric
 

Transmission

Chain Number of Links:
102
Clutch Type:
Wet multi plate
Final Drive:
Chain
Gearchange Pattern:
1 N 2 3 4 5
Gear Ratio 1st:
37/14 (2.642)
Gear Ratio 2nd:
32/19 (1.684)
Gear Ratio 3rd:
29/23 (1.260)
Gear Ratio 4th:
26/26 (1.000)
Gear Ratio 5th:
23/28 (0.821)
Gear Ratio 6th:
N/A
Primary Drive:
Gear
Primary Drive Ratio:
72/23 (3.130)
Sprocket front:
16
Sprocket rear:
46
Transmission:
5 speed

Misc.

Motorcycle Style:
Classic

Power

Max Power Output:
17.00 HP (12.4 kW)) @ 7400 RPM
Top Speed:
71.5 mph

Suspension

Front:
telescopic fork oil dampened
Rear:
twin Shock

Tyres

Front:
3.00-18-PR Tubed
Rear:
120/90-16 63p Tubed