Two-Stroke Nirvana: Yamaha RD Series Motorcycles for the True Enthusiast

The Yamaha RD series of motorcycles is a true classic in the world of two-stroke engines. These bikes were first introduced in the 1970s and quickly became a favorite among motorcycling enthusiasts for their lightweight design, nimble handling, and outstanding performance.

The RD series is comprised of several models, with the RD350 and RD400 being the most popular. These bikes feature air-cooled, two-stroke engines that offer a unique and thrilling riding experience. The two-stroke engine design is known for its simplicity and responsiveness, making these bikes a joy to ride.

One of the most appealing aspects of the Yamaha RD series is their ability to be fine-tuned for even more power. With the right modifications and maintenance, these bikes can be transformed into true performance machines. This has led to a dedicated community of enthusiasts who are passionate about preserving and restoring these classic bikes.

The Yamaha RD series is also known for its iconic design. The bikes feature a sleek, minimalist look that is both timeless and stylish. The classic cafe racer styling of the RD350 and RD400, in particular, has made them favorites among vintage motorcycle enthusiasts.

But the Yamaha RD series is not just a favorite among vintage motorcycle enthusiasts, it's also loved by modern street riders, enduro riders and motocross fans, the bike has something for everyone. The lightweight design and nimble handling make these bikes perfect for navigating tight city streets, while the performance capabilities make them a blast to ride on winding country roads.

The Yamaha RD series is also a favorite among dirt bike riders and motocross enthusiasts. The lightweight design and responsive engine make these bikes well-suited for off-road riding. With the right modifications, the RD350 and RD400 can be transformed into formidable dirt bikes that can hold their own on the motocross track.

One of the most appealing aspects of the Yamaha RD series is their two-stroke engine. Two-stroke engines are known for their simplicity and responsiveness, making them a favorite among motorcycle enthusiasts. However, two-stroke engines have their own set of maintenance requirements and need more frequent oil changes and air filter cleaning compared to four-stroke engines.

The two-stroke culture is a unique and passionate community, dedicated to preserving and restoring these classic bikes. Many RD enthusiasts are also involved in two-stroke performance tuning, and can help you with rebuilds, maintenance and racing.

The Yamaha RD series is a true classic in the world of motorcycling. These bikes offer a unique and thrilling riding experience that is sure to delight enthusiasts. With their lightweight design, nimble handling, and outstanding performance, the Yamaha RD series is a must-have for any motorcycle enthusiast. Whether you're into classic cafe racing, modern street riding, enduro riding, motocross, or just a fan of two-stroke engines, the Yamaha RD series has something for everyone. Join the community of RD enthusiasts and be a part of the legacy that is Yamaha RD series.

Lets have a quick chat about this legend two stroke at Chitchatx

RD350 Side Fins

RD350 side panel fins
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RD350 Spokes

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Rd350 Clutch Steel Plates

Rd350 Steel Plate for clutch

Yamaha Genuine Parts  http://rd350.info

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RD350 Yamaha History

RD350 History

More info: http://rd350.info

The RD350 was a motorcycle produced by Yamaha. It evolved from the piston port (pre-reed valve intake tract), front drum-braked, 5 speed Yamaha 350 cc “R5″.[1]

It featured a reliable air-cooled, parallel twin, 6 speed (in some markets, such as the UK, the first model was sold in 5-speed form), reed valve equipped intake tract two-stroke engine. Available in either a dark green or brandy red with white and black side details with metal emblem “Yamaha” on the tank RD350 (1973), the RD350A (1974), simple purple tank with “Yamaha” decal on the tank, and the orange with white RD350B (1975). The B model (in the UK at least) also featured a silver and black colour scheme.

All models were equipped with “Autolube” automatic oil injection, relieving the user from the need to mix gasoline and two-stroke oil.[2]
Rim sizes were 18″ WM2 (1.85″) front and 18″ WM3 (2.15″), both being of chromed, wire spoked steel construction. In the UK, rim sizes were 1.60 front and 1.85 rear.

Brakes were: single front disc brake and a rear drum brake, a combination described by Cycle Magazine as the best in its class.
The frame dimensions of the street 350 were very similar to the famous Yamaha TZ250 and TZ350 series factory road race bikes, differing mainly in weight and front fork rake – the RD being ~27 degrees and the TZ being ~25 degrees. The frames appeared similar, side by side, with the street frame adorned with many brackets for the street equipment. The weight difference was substantial though, with the street going RD frame weighing almost twice as much as the “TZ” roadrace race frame.

The stock bike made about 32 to 35 true rear-wheel HP at about 7500 rpm – very fast for the time. A contemporary of the RD was the Kawasaki H2 750cc Triple, said to make 72 to 75 true HP (tested by Cycle Magazine at 55 bhp).
The 350 evolved into the more refined and cleaner running RD400C in 1976, the “D” and “E” in 77-78 and the final model, the white 1979 RD400F.

Indian Rd350 History:

The RD350B was assembled in India between 1983-1990 by Escorts group under the brand name Rajdoot 350. It did not repeat the worldwide success of the RD350B in the Indian market. Its lackluster sales figures can be attributed to high purchase price and poor fuel consumption. However, it established Yamaha as a performance bike manufacturer in India. There were two models for the Rajdoot 350 – High Torque and Low Torque. Compared to the Yamaha RD350B that made 39 crankshaft bhp, the Indian-made HIGH TORQUE made 30.5 bhp (22.7 kW) and the later LOW TORQUE made only 27 bhp (20 kW), all in quest of better fuel economy. By the time the production ended in 1990, the bike was completely indigenized with very little Japanese part content.

The flagship model was a top of the line High torque road ripper, in other words a true mean machine. Capable of speeds up to 160 kmph and with an acceleration of 0-60 kmph in 4 secs, this bike is easily the fastest bike ever to be launched in India. However extremely high fuel consumption made this bike very unpopular amongst the common masses or the “Janta” which formed about 80% of the population, as a result the sales dropped drastically. In 1985, to make amends Escorts came out with the second flagship model, which was a toned down version of the first model. Although this bike had enough power to lick any other bike on the street, it was no match to the powerful bikes launched in ’83 and ’84.This model was clearly aimed at the more economy conscious segment of the population. However around that time came about the advent of the sub-100 cc 2 stroke and 4 stroke motorcycles. These bikes were not only economic in terms of fuel consumption, but were peppy enough to satisfy the needs of the average speed-freak. As a result the RD 350 sales nearly came to a stand-still and soon the production of the bike had to be discontinued.

 RD350 Discontinued:

Sad but true, the RD 350  is no longer available for sale, however there are plenty of second-hand bikes around in real good condition waiting to be picked up. So if you are one of those guys who has the need for speed, but doesn’t have a big fat wallet to buy the ultra-modern, super-sophisticated super bikes, then the RD 350 is the bike for you!! With good care and certain useful alterations this bike can prove to be a good companion for those long rides, for a real long time. I am a die-hard RD 350 enthusiast and have owned 3 RD350″s and ridden this 2stroke-wonder for the past 12 years. There is one thing that you have to remember though, this bike has one of the most versatile engines, hence with the right modifications this bike can even outperform bikes twice its size. So keep that in mind!! No wonder this bike is amongst the top 10 bikes of the century (Ranking by cycle world USA). Great going RD350 .

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