The 1968 Yamaha YR1 350 was a groundbreaking motorcycle in Yamaha’s lineup, marking a significant milestone in their two-stroke development. It was known for its strong performance and sleek styling, making it a standout in its era.
General Overview
- Production Year: 1967–1968 (introduced as the 1968 model)
- Engine: 348cc, air-cooled, two-stroke, parallel twin
- Power Output: Approximately 36 horsepower at 8,500 rpm
- Transmission: 5-speed manual
- Top Speed: ~105 mph (169 km/h)
- Weight: ~150 kg (330 lbs) (dry weight)
Key Features
- Engine and Performance:
- The YR1 350 was powered by Yamaha’s first 350cc two-stroke twin-cylinder engine, setting the stage for future RD-series motorcycles.
- It utilized piston-port induction for efficient airflow and sharp throttle response.
- The engine’s high-revving nature, combined with its lightweight, made it a strong performer in its class.
- Design:
- The bike featured a classic 1960s design with a sleek fuel tank, round headlight, and a simple, chrome-laden aesthetic.
- Its dual exhaust pipes ran along both sides, enhancing its sporty look.
- Chassis and Handling:
- A lightweight steel frame provided good rigidity and agility, making the YR1 nimble in corners.
- Front Suspension: Telescopic forks.
- Rear Suspension: Twin shock absorbers.
- While the suspension was basic, it provided adequate comfort and handling for the time.
- Braking:
- Drum brakes on both the front and rear wheels were standard. Although effective for the era, they required skillful use for stopping at higher speeds.
- Instrumentation and Features:
- Twin round gauges (speedometer and tachometer) dominated the cockpit, providing clear and simple readouts.
- The attention to detail in fit and finish reflected Yamaha’s commitment to quality.
Cultural and Historical Significance
- The YR1 350 was a precursor to Yamaha’s famous RD-series bikes, like the RD350 and RD400, which would dominate the sportbike scene in the 1970s.
- It appealed to riders seeking a blend of performance and reliability, offering an affordable entry into high-performance motorcycles.
- Its success helped establish Yamaha as a leader in the production of high-revving, two-stroke motorcycles.
Legacy
Today, the 1968 Yamaha YR1 350 is a collector’s item cherished by vintage motorcycle enthusiasts. Its role as a forerunner to the RD series and its beautiful classic design ensure its enduring appeal.
Would you like insights into restoration, performance comparisons, or more details about its influence on Yamaha’s later models?