Yamaha RD 350 Specifications

Rajdoot Yamaha RD 350 (HT)

Technical and engine specifications of the RD 350s that were sold in India. The motorcycles sold here were underpowered compared to the RDs that were available else where in the world.

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 on good pistons etc. from brands like Wiseco. Look around on the internet for deals or offers.

Someone had mailed me questions about how to port 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 that are still around.

For more information:

Techincal Specifications of the Yamaha RD 350*:
dimensions:
Overall length
Overall width
Overall height
Wheelbase
Min. ground clearance
Weight(Dry)
:
:
:
:
:
:
2,040mm
835mm
1,110mm
1,320mm
155mm
143 kgs
performance:
Speed
Climbing ability
Braking distance
Min. turning radius
Acceleration performance(400m)
:
:
:
:
:
130 km/h max. (?150km/h)
28┬║
14m at 50 km/h
2,300mm
13.7 secs
engine:
Model
TypeCylinders
Carburettors
Lubrication
Displacement
Bore and Stroke
Compression ratio
Maximum power
Maximum torque
Starting
Ignition
Air filter
:
::
:
:
:
:
:
:
:
:
:
:
1A1.51
2 stroke cycle, Air cooled gasoline, Torque Induction
Twin cylinders, forward inclined in parallel
Twin Mikuni VM-28
Autolube
347cc
64mm*54mm
6.6:1
30.5bhp@6,750rpm
3.3kg-m@6,500rpm
Kick starting
Battery ignition
Dry paper filter type
power transmission:
Clutch
Primary reduction system
Primary reduction ratio
Secondary reduction system
Secondary reduction ratio
Gear box
:
::
:::
Wet, multi plate type
Helical gear drive2.869:1 (66:23)
Chain sprocket2.666:1 (40:15)Constant mesh, 6 forward speed
gear ratios:
1st
2nd
3rd
4th
5th
6th
:
:
:
:
:
:
2.571:1 (36/14)
1.777:1 (32/18)
1.318:1 (29/22)
1.040:1 (26/25)
0.888:1 (24/27)
0.785:1 (22/28)
transmission oil:
Quantity
Type
:
:
1500cc +/- 50cc
SAE 10W/30SC
filling capacity:
Fuel tankOil tank :: 15.5ltrs (Petrol)
-3ltrs Reserve
-2ltrs Useable
2ltrs (Servo 2T Supreme)
frame:
Model
Type
:
:
1A1
Double cradle type
suspension:
Front
Rear
:
:
Telescopic Fork Oil Damped
Swing arm, Coil spring oil damper (Adjustable 3 position)
braking system:
Front
Rear
:
:
Internal Expansion Twin Leading type
Internal Expansion
tyres:
Front
Rear
:
:
3.00*18-4PR
3.50*18-4PR
generator:
Model
Manufacturer
Spark plug
Battery
Horn
:
:
:
:
:
AR 3345
Kokusan Denki, Japan
BP7HS-NGK or equivalent
12v 5.5AH
12v 2.5Amps
lights:
Head light
Tail light/ Stop light
Flasher lights
Neutral light
Meter lights
High Beam Indicator light
Flasher Pilot light
:
:
:
:
:
::
12V-35/35W
12V-8/27W
12V-27W*2
12V-2W
12V-2W*4
12V-2W12V-2W
*All the data is from the workshop manual.
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