Spec Sheet
The information below is specific to the Yamaha - RD 400 F 79, 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:
400
Service
2 Stroke Tank - Litres:
1800 mL
Chain Freeplay mm:
20-30 mm
Engine Oil quantity (litres):
1500 mL
Fork oil grade:
SAE 10W30 motor oil
Front Fork Oil cc (left leg):
163.5 mL +/- 4 mL
Front Fork Oil cc (right leg):
163.5 mL +/- 4 mL
Gearbox Oil grade:
10W30 SAE Motor Oil
Idle Speed (rpm):
1400 RPM
Spark Plugs Gap (mm):
0.7-0.8 mm
Two Stroke Oil:
JASO FB / ISO-L-EGD made for air cooled engines
Tyre Pressure Back Bar / psi:
28 PSI
Tyre Pressure Front Bar / psi:
26 PSI
Brakes
Front:
Disc
Rear:
Disc
Brake fluid:
DOT 3
Front Disc Size:
267 mm x 7 mm
Front-Pistons-per-caliper:
1
Rear Disc Size:
267 mm x 7 mm
Rear-Pistons-per-caliper:
1
Dimensions
Dry Weight:
158 kg
Fuel Capacity:
16.5 L
Ground Clearance:
149 mm
Length:
2030 mm
Rake:
27.5 degrees
Seat Height:
800 mm
Trail:
108 mm
Wheelbase:
1320 mm
Width:
759 mm
Electrics
Voltage:
12v
Battery:
12N-3A-5.5B
Bulb-Headlight:
12V 35W/35W Sealed Beam
Charging System:
AC Three Phase Magneto
Ignition:
Capacitive Discharge
Ignition Timing:
2.0 mm BTDC
Main Fuse:
20A
Spark Plugs:
B8ES Low Speed/B9ES High Speed
Spark Plugs (Iridium):
BR9EIX
Engine
Type:
Air Cooled 2 Stroke Reed Valve Parallel Twin
Air Filtration:
Paper Element, Dry
Bore x Stroke:
64 mm x 62 mm
Carburation:
Mikuni VM28SS
Compression Ratio:
6.0:1
Displacement:
398 cc
Fuel Minimum Octane Rating:
90
Lubrication System:
Autolube
Red line RPM:
8500
Starting:
Kickstarter
Transmission
Chain Number of Links:
95, plus joint
Chain type:
530
Clutch Type:
Wet, Multi-disc Type
Final Drive:
Chain
Gearchange Pattern:
1 Down, 5 Up
Gear Ratio 1st:
2.571
Gear Ratio 2nd:
1.778
Gear Ratio 3rd:
1.318
Gear Ratio 4th:
1.083
Gear Ratio 5th:
0.962
Gear Ratio 6th:
0.889
Primary Drive:
Helical Gear
Primary Drive Ratio:
2.869
Sprocket front:
17
Sprocket rear:
38
Transmission:
Constant Mesh, 6 speed forward
Misc.
Colour Options:
New Pearl White
Frame:
Double Cradle, High Tensile Type
Fuel Control:
Carburetor
Motorcycle Style:
Sport Street
Place of Manufacture:
Japan
Power
Fuel Consumption:
32 km/L @ 60 km/h
Max Power Output:
44 HP
Standing 1/4 mile:
14.0 Seconds
Top Speed:
170 km/h plus
Suspension
Front:
Teloscopic Fork
Front Travel:
140 mm
Rear:
Oil Damper, Coil Spring
Rear Travel:
80 mm
Tyres
Front:
3.25-18 Tubed
Rear:
3.50-18 Tubed
Wheels
Bearing Front Left:
6302RS
Bearing Front Right:
6302RS
Front:
Cast Aluminum
Rear:
Cast Aluminum
Related Sites
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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.