Yamaha - SR 500 78

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Bike Info

CC:
500
SR 500 Parts and accessories

Service

Chain Freeplay mm:
20 mm (0.79 in)
Engine Oil Grade SAE:
20W / 40
Engine Oil quantity (litres):
2.1 lit (2.2 US.qt) 1.85 IMP.qt)
Engine Oil quantity with filter (litres):
2.4 lit (2.5 US.qt) (2.11 Imp. qt)
Float Height:
23.5 +or- 1 mm (.925 +or- .039 in)
Fork oil grade:
10 Wt
Front Fork Oil cc (left leg):
182 cc (6.15 oz) (6.41 IMP.oz)
Front Fork Oil cc (right leg):
182 cc (6.15 oz) (6.41 IMP.oz)
Idle Speed (rpm):
1100 r/min
Spark Plugs Gap (mm):
0.7 ~ 0.8 mm (0.028 ~ 0.031 in)
Valve Clearance Cold - Exhaust:
0.12-0.17
Valve Clearance Cold - Inlet:
0.07-0.12

Brakes

Front:
Disc
Rear:
Drum
Front Disc Size:
298 mm
Front-Pistons-per-caliper:
1

Dimensions

Dry Weight:
163 kg (359 lbs)
Fuel Capacity:
12 lit (3.2 US.Gal) (2.6 IMP.gal)
Ground Clearance:
165 mm (6.5 in)
Height:
1,150 mm (45.3 in)
Length:
2,105 mm (82.9 in)
Rake:
27.5 deg (62.5 deg)
Trail:
117 mm (4.6 in)
Wheelbase:
1,410 mm (55.5 in)
Width:
835 mm (32.9 in)

Electrics

Voltage:
12v
Battery:
12N7-3B / G.S.
Bulb-Headlight:
50W/40W
Charging System:
AC magneto
Ignition:
CDI / NIPPON DENSO
Main Fuse:
20A
Spark Plugs:
NGK BP7ES

Engine

Type:
Air Cooled 4 Stroke SOHC Single
Air Filtration:
Dry foam rubber
Bore x Stroke:
87 x 84 mm
Carburation:
VM34SS MIKUNI
Carburation Idle Jet:
#25
Carburation Main Jet:
#300
Compression Ratio:
9.0:1
Displacement:
499cc
Lubrication System:
Dry sump, trochoidal pump
No. of Valves:
2
Pilot Screw Setting:
Preset
Starting:
Kickstart

Transmission

Chain Number of Links:
104
Chain type:
DID 50 HDSS
Clutch Type:
Wet multi plate
Final Drive:
Chain
Gearchange Pattern:
1 N 2 3 4 5
Gear Ratio 1st:
33/14 (2.357)
Gear Ratio 2nd:
28/18 (1.555)
Gear Ratio 3rd:
25/21(1.190)
Gear Ratio 4th:
22/24 (0.916)
Gear Ratio 5th:
21/27 (0.777)
Primary Drive Ratio:
77/30 (2.566), spur gear
Sprocket front:
14
Sprocket rear:
42
Transmission:
5 speed constant mesh

Misc.

Frame:
Tubular steel semi double cradle
Motorcycle Style:
ROADSTER
Place of Manufacture:
Japan

Power

Fuel Consumption:
45 mpg
Max Power Output:
38 bhp
Top Speed:
93 mph

Suspension

Front:
Telescopic fork
Rear:
Coil spring, oil damper x 2

Tyres

Front:
100/90-19 Tubeless
Rear:
400-18 Tubed

Wheels

Bearing Front Left:
6303Z
Bearing Front Right:
6303ZZ
Front:
1.85-19 / Aluminum
Rear:
2.15-18 / Aluminum