Jet7 Bike

15/08/2026

1976 Yamaha DT100C & DT250C — Two-Stroke Enduro Legends

In the 1970s, Yamaha’s DT series became one of the most recognizable names in the growing enduro motorcycle scene. These lightweight machines were designed to combine everyday road usability with the freedom to explore dirt roads and trails.

The 1976 Yamaha DT100C featured a 97 cc air-cooled, two-stroke single-cylinder engine, producing around 10 hp @ 7,500 rpm. Compact, light, and easy to handle, it was an ideal choice for riders looking for an approachable enduro with genuine two-stroke character.

Stepping up in size was the 1976 Yamaha DT250C, powered by a 246 cc air-cooled, two-stroke single-cylinder engine producing around 24 hp @ 7,000 rpm. With significantly more torque and performance, the DT250C offered the extra power needed for tougher trails while remaining practical enough for everyday riding.

Both motorcycles carried Yamaha’s unmistakable 1970s enduro styling — wire-spoke wheels, long-travel suspension, high front fenders, classic fuel tanks, and simple two-stroke engineering. They represented an era when motorcycles were relatively simple, lightweight, and built to be ridden rather than simply displayed.

The DT series helped establish the idea that one motorcycle could serve multiple purposes: commuting during the week, exploring dirt roads on the weekend, and enjoying the unmistakable sound and feel of a two-stroke engine.

DT100C — small, light, and nimble.
DT250C — bigger, stronger, and more capable.

Two different sizes, but the same Yamaha spirit. 🇯🇵🏍️💨

If you could ride one today, which would you choose — DT100C or DT250C? 👇

15/08/2026

15/08/2026

1986 Yamaha RD350 F2 YPVS Hybrid

🤔 We Reckon: This 1986 Yamaha RD350 YPVS F2 features an NK Racing-modified frame, RGV250 VJ22 banana swingarm, suspension, forks and brakes, plus a GSX-R400 rear wheel, Koso dash, Micron GP pipes and Swarbrick carbon cans. Not always a 'hybrid' fan but this one looks lovely!

Link in comments 👇

15/08/2026

14/08/2026

Yamaha’s 360cc Two-Stroke Legacy

In the early 1970s, Yamaha built some of its most memorable lightweight two-stroke motorcycles.

The 1971 Yamaha RT1-B 360 brought a 351cc two-stroke single-cylinder engine, producing around 30 bhp at 6,000 rpm, with a top speed of approximately 78+ mph. It was a rugged machine designed to combine strong performance with genuine off-road capability.

By 1974, Yamaha evolved the concept into the DT360A, part of the legendary DT series. Its 351cc two-stroke single produced around 32 bhp at 6,000 rpm, with a claimed top speed of about 80 mph.

From the RT1-B to the DT360A, Yamaha’s 360cc two-strokes became a symbol of the era—simple, tough, lightweight, and full of two-stroke character.

Two bikes. One legendary Yamaha spirit. 🏍️🔥

14/08/2026

1985 Yamaha RD500 YPVS

🤔 We Reckon: The Yamaha RD500 YPVS promised Grand Prix thrills for the road, with its exotic V4 2-stroke engine, race styling and Kenny Roberts-inspired image. Few new bikes of the 1980s created such excitement—but did its performance and handling live up to the enormous expectations?

Link in comments 👇

14/08/2026

06/08/2026

# 1983 Yamaha RD350LC

# # The Complete Sports Motorcycle — Total Performance Technology

The **1983 Yamaha RD350LC** was developed to bring Yamaha's Grand Prix racing technology to the public road. Rather than focusing solely on outright horsepower, Yamaha engineered the RD350LC around its **"Total Performance"** philosophy—combining power, handling, braking, reliability, and rider control into one balanced package.

At its heart is a **347 cc liquid-cooled, two-stroke parallel twin** featuring **Torque Induction** and the revolutionary **Yamaha Power Valve System (YPVS)**. Together, these technologies broaden the engine's usable powerband, delivering strong low-end torque while maintaining impressive top-end performance. Power is transmitted through a **6-speed gearbox**, with **CDI ignition** and Yamaha's proven **Autolube** oil injection system.

The electronically controlled **YPVS** is operated by a **servomotor and microcomputer**, automatically adjusting the exhaust valve according to engine speed. The system begins its self-check as soon as the ignition is switched on, improving low-speed rideability while preserving high-rpm performance.

To ensure consistent performance under demanding conditions, the RD350LC employs a **thermostatically controlled sealed liquid-cooling system** with a lightweight aluminum radiator and a separate coolant recovery tank. This design maintains stable operating temperatures even during sustained high-speed riding.

The chassis reflects Yamaha's World Championship racing experience, featuring a **wide-spaced, full-triangulated frame** for exceptional rigidity, together with a **Progressive Rising-Rate Monocross rear suspension**, **triple disc brakes**, and lightweight **three-spoke alloy wheels**. The result is a motorcycle designed to inspire confidence on both road and track.

The aerodynamic head fairing and engine cowling form an integral part of the motorcycle's styling while remaining practical. The fairing can be removed easily using just two screws, providing quick access to the wiring and the **60/55 W quartz-halogen headlamp**.

Compared with previous RD twin-cylinder engines, the new powerplant is **10 mm narrower**, incorporates a **plastic crankcase cover** to reduce weight, and uses **orthogonal engine mounts** to minimize vibration transmitted to the rider.

# Specifications

# # # Engine

* **Type:** 2-stroke, liquid-cooled, Torque Induction twin with YPVS
* **Displacement:** 347 cc
* **Bore × Stroke:** 64.0 × 54.0 mm
* **Compression Ratio:** 6.0 : 1
* **Maximum Power (DIN):** 59.1 PS (43.5 kW) @ 9,000 rpm
* **Maximum Torque (DIN):** 4.8 kg·m (46.5 Nm) @ 8,500 rpm
* **Lubrication:** Autolube
* **Carburetion:** VM26 × 2
* **Ignition:** CDI
* **Starting System:** Kick starter
* **Fuel Tank Capacity:** 20.0 L
* **Oil Capacity:** 1.6 L
* **Transmission:** 6-speed
* **Final Drive:** Chain

# # # Chassis

* **Overall Length:** 2,095 mm
* **Overall Width:** 710 mm
* **Overall Height:** 1,175 mm
* **Seat Height:** 800 mm
* **Wheelbase:** 1,385 mm
* **Ground Clearance:** 175 mm
* **Dry Weight:** 145 kg