Definition
The Yamaha RX‑Z is a two‑stroke, single‑cylinder sport motorcycle that was manufactured by Yamaha Motor Company. It was produced primarily between 1990 and 1999 for various Asian markets, most notably India, Thailand, and the Philippines.
Overview
The RX‑Z was introduced in 1990 as a successor to the earlier Yamaha RX‑F series. It was positioned as an entry‑level sport bike, offering high performance relative to its displacement of 133 cc. The model gained popularity for its lightweight construction, aggressive styling, and strong acceleration, making it a common choice for both daily commuting and youthful sport riding. Production ceased in the late 1990s, but the bike retains a cult following among enthusiasts and collectors, particularly in South Asia.
Etymology/Origin
The designation “RX” follows Yamaha’s historical naming convention for two‑stroke sport motorcycles (e.g., RX‑100, RX‑125). The suffix “‑Z” was added to differentiate this model from earlier RX variants and to convey a sportier image; however, Yamaha has not publicly disclosed a specific meaning for the “Z” character.
Characteristics
- Engine: 133 cc air‑cooled, single‑cylinder, two‑stroke engine equipped with a reed valve induction system. Output is rated at approximately 15 bhp (11 kW) at 8,500 rpm.
- Transmission: 5‑speed constant‑mesh gearbox with a chain final drive.
- Frame and Suspension: Steel tubular frame; front suspension consists of telescopic forks, while the rear uses a swingarm with dual shock absorbers.
- Brakes: Front disc brake (single 260 mm rotor) and rear drum brake (130 mm).
- Dimensions: Wheelbase 1,260 mm; overall length 1,995 mm; seat height 770 mm; dry weight around 115 kg.
- Fuel Capacity: 11 L, providing a typical range of 150–180 km depending on riding conditions.
- Styling: Sharp angular fairings, a prominent fuel tank, and a sporty riding posture characterize its design, reflecting the early‑1990s trend in Japanese sport motorcycles.
Related Topics
- Yamaha RX‑100 and Yamaha RX‑125 (predecessor two‑stroke sport models)
- Two‑stroke engine technology and its phase‑out in many markets due to emission regulations
- Yamaha R15 series (modern four‑stroke sport motorcycles targeting a similar market segment)
- Motorcycle culture in India during the 1990s, where the RX‑Z was a notable presence
Note: All specifications are based on factory data and contemporary reviews from the period of production.