Yamaha RD 350 Specifications

Technical and engine specifications of the RD 350s that were sold in India. The motorcycles sold here were underpowered compared to the RDs available worldwide. Yamaha RD 350s are iconic motorcycles and are loved by 2-stroke enthusiasts worldwide.

And it was my first motorcycle, so I will always have a soft spot for it.

Near the potter's place. My last stop on the way back.
My RD350 on what old Madras road looked like in the 90-2000s

Rajdoot Yamaha RD 350 (HT)

The ports on the engine needed a fair deal of work before they matched/ beat them—one of the reasons why the US specification barrels became a sought-after modification.

If you’re getting US Spec barrels, it would be wise to invest in good pistons (and other 3rd party parts) from brands like Wiseco. Look around on the internet for deals or offers.

Someone had mailed me questions about how to go about porting their barrels. If you’re someone like that, leave the engine modification to someone who knows his job. RD barrels are hard to come by, and don’t waste the ones still around.

For more information:

Yamaha RD 350 Specifications

Performance

Speed
130 km/h max. (?150km/h)
Climbing ability
28º
Braking distance
14m at 50 km/h
Min. turning radius
2,300mm
Acceleration performance(400m)13.7 secs

Gear Ratios

1st gear
2.571:1 (36/14)
2nd gear
1.777:1 (32/18)
3rd gear
1.318:1 (29/22)
4th gear
1.040:1 (26/25)
5th gear
0.888:1 (24/27)
6th gear0.785:1 (22/28)

Power transmission

Clutch
Wet, multi plate type
Primary reduction systemHelical gear drive
Primary reduction ratio2.869:1 (66:23)
Secondary reduction systemChain sprocket
Secondary reduction ratio2.666:1 (40:15)
Gear boxConstant mesh, 6 forward speed

Dimensions

Overall Length
2,040mm
Overall width
835mm
Overall height
1,110mm
Wheelbase
1,320mm
Min. ground clearance
155mm
Weight(Dry)143 kgs

Braking system

FrontInternal Expansion Twin Leading type
RearInternal Expansion

Filling Capacity

Fuel tank15.5ltrs (Petrol)
-3ltrs Reserve
-2ltrs Useable
Oil tank2 liters (Servo 2T Supreme)

Tyres

Front3.00*18-4PR
Rear3.50*18-4PR

Generator

Model
AR 3345
ManufacturerKokusan Denki, Japan
Spark plug
BP7HS-NGK or equivalent
Battery12v 5.5AH
Horn12v 2.5Amps

Rajdoot Yamaha RD 350 (HT) Lights

Tail light/ Stoplight
12V-35/35W
Tail light/ Stop light
12V-8/27W
Flasher lights12V-8/27W
Neutral light12V-27W*2
Meter lights12V-2W
High Beam Indicator light12V-2W*4
Flasher Pilot light12V-2W12V-2W

Frame

Model1A1
TypeDouble cradle type

Transmission Oil

Quantity
1500cc +/- 50cc
TypeSAE 10W/30SC

Suspension

FrontTelescopic Fork Oil Damped
RearSwing arm, Coil spring oil damper (Adjustable 3 position)

Rajdoot Yamaha RD 350 Engine

Model
1A1.51
Type2-stroke cycle, Air-cooled gasoline, Torque Induction
CylindersTwin cylinders, forward inclined in parallel
CarburettorsTwin Mikuni VM-28
LubricationAutoLube
Displacement347cc
Bore and Stroke64mm*54mm
Compression ratio6.6:1
Maximum power30.5bhp@6,750rpm
Maximum torque
3.3kg-m@6,500rpm
StartingKick starting
IgnitionBattery ignition
Air filterDry paper filter type

All the data is from the workshop manual.

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