Spec Sheet
The information below is specific to the Yamaha - SR 500 78, showing anything for service information to the amount of fork oil or even the tyre pressures. If you would like to contribute any missing information, please use the edit link below.
Back.Bike Info
CC:
500
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
Add information to the model
All information presented on the website is given to the best of our knowledge at the given time. All information is intended to only as a guide. A major Japanese manufacturer's quote:
We reserve the right to vary our specification with or without notice, and as such time and in such manner as we think fit.