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.

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:

• History of Rajdoot 350s in India
• History of Yamaha RD350 around the world

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 gear	0.785:1 (22/28)

Power transmission

Clutch	Wet, multi plate type
Primary reduction system	Helical gear drive
Primary reduction ratio	2.869:1 (66:23)
Secondary reduction system	Chain sprocket
Secondary reduction ratio	2.666:1 (40:15)
Gear box	Constant 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

Front	Internal Expansion Twin Leading type
Rear	Internal Expansion

Filling Capacity

Fuel tank	15.5ltrs (Petrol) -3ltrs Reserve -2ltrs Useable
Oil tank	2 liters (Servo 2T Supreme)

Tyres

Front	3.00*18-4PR
Rear	3.50*18-4PR

Generator

Model	AR 3345
Manufacturer	Kokusan Denki, Japan
Spark plug	BP7HS-NGK or equivalent
Battery	12v 5.5AH
Horn	12v 2.5Amps

Rajdoot Yamaha RD 350 (HT) Lights

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

Frame

Model	1A1
Type	Double cradle type

Transmission Oil

Quantity	1500cc +/- 50cc
Type	SAE 10W/30SC

Suspension

Front	Telescopic Fork Oil Damped
Rear	Swing arm, Coil spring oil damper (Adjustable 3 position)

Rajdoot Yamaha RD 350 Engine

Model	1A1.51
Type	2-stroke cycle, Air-cooled gasoline, Torque Induction
Cylinders	Twin cylinders, forward inclined in parallel
Carburettors	Twin Mikuni VM-28
Lubrication	AutoLube
Displacement	347cc
Bore and Stroke	64mm*54mm
Compression ratio	6.6:1
Maximum power	30.5bhp@6,750rpm
Maximum torque	3.3kg-m@6,500rpm
Starting	Kick starting
Ignition	Battery ignition
Air filter	Dry paper filter type

All the data is from the workshop manual.