Yamaha RD 350 LC [1980-1982]: A Two-Stroke Legend Revisited

Introduction

The Yamaha RD 350 LC is not just a motorcycle—it’s a time capsule of adrenaline, innovation, and the raw, unfiltered spirit of two-stroke performance. Produced between 1980 and 1982, this liquid-cooled screamer became the benchmark for lightweight sport bikes, blending racetrack DNA with street-riding practicality. Even by modern standards, the RD 350 LC remains a visceral experience, demanding respect from riders who crave the thrill of a high-revving engine and the tactile feedback of analog mechanics. Let’s dive into what makes this icon tick—and why it still captivates riders decades later.

---

Design: Form Follows Function (With a Dash of ‘80s Flair)

The RD 350 LC’s design is a masterclass in purposeful minimalism. Its tubular steel frame, boxy fuel tank, and angular tail section scream “function over frills,” yet there’s an undeniable charm to its no-nonsense aesthetic. The 32mm telescopic forks (a significant upgrade over earlier models) and twin rear shocks hint at its performance intentions, while the compact dimensions—170 kg (375 lbs) wet—make it feel almost toy-like compared to modern middleweights.

The riding position is aggressive but not punishing. The narrow seat and low clip-on bars put you in a slight forward lean, perfect for darting through traffic or attacking winding roads. The analog gauges are refreshingly simple: a speedometer, tachometer, and basic warning lights—no menus, no distractions.

---

Engine and Performance: The Two-Stroke Symphony

At the heart of the RD 350 LC lies its 347cc parallel-twin, liquid-cooled two-stroke engine—a marvel of engineering that delivers 49 PS (36 kW) at 8,500 RPM. For context, that’s nearly 144 PS per liter, a figure that would embarrass many modern four-strokes. The powerband is a classic two-stroke crescendo: docile below 5,000 RPM, then a sudden surge as the YPVS (Yamaha Power Valve System) kicks in, propelling you forward with a manic, high-pitched wail.

Riding the RD 350 LC is a lesson in momentum management. Keep the revs above 6,000 RPM, and it’s a rocket; let them drop, and you’ll need to downshift aggressively. The six-speed transmission (a rarity in its era) helps exploit the narrow powerband, though the clutch requires a firm hand. Fuel economy? Let’s just say the 18-liter (4.75-gallon) tank and two-stroke oil mixing won’t win eco awards, but smiles per gallon are off the charts.

---

Handling: Lightweight Agility Meets Vintage Limits

Weighing just 170 kg (375 lbs), the RD 350 LC feels like an extension of your body. The chassis is stiff enough to inspire confidence mid-corner, yet forgiving enough to handle rough pavement. The 32mm forks and twin shocks (adjustable for preload) offer a firm but compliant ride—ideal for spirited riding, though long highway stints might leave your wrists begging for mercy.

Tire pressure is critical. Yamaha recommended 2.0 bar (29 psi) up front and 2.25 bar (32.6 psi) at the rear for optimal grip, and deviating even slightly dulls the bike’s razor-sharp turn-in. The sprocket combination (16/39 teeth) prioritizes acceleration over top speed, making it a hooligan’s dream in tight corners. Just don’t expect modern levels of stability—the skinny tires and short wheelbase can feel twitchy at triple-digit speeds.

---

Competition: How the RD 350 LC Stacks Up

The early ‘80s were a golden age for two-strokes, and the RD 350 LC faced fierce rivals:

1. Kawasaki KH250: A triple-cylinder two-stroke with a smoother power delivery but heavier chassis (182 kg / 401 lbs). The KH250 lacked the LC’s liquid cooling and peaky character, making it more beginner-friendly but less thrilling.
2. Suzuki GT380: A larger 371cc triple with a broader torque spread. The GT380 excelled in touring comfort but couldn’t match the RD’s power-to-weight ratio.
3. Honda CB400T: A four-stroke twin that prioritized reliability over excitement. The Honda’s 34 kW (46 PS) felt tame compared to the Yamaha’s explosive hit.

The RD 350 LC’s closest analog today? Imagine a cross between a Yamaha R3 and a dirt bike—light, frenetic, and utterly engaging.

---

Maintenance: Keeping the Legend Alive

Owning an RD 350 LC is a labor of love. Here’s what to prioritize:

1. Two-Stroke Oil: Use high-quality injector oil (1.6L capacity) and mix ratios religiously. Skimp here, and you’ll risk piston seizures.
2. Spark Plugs: NGK BR8ES (standard) or BR8EIX (iridium) are musts. Check the 0.8mm electrode gap every 1,000 km (620 miles).
3. Chain Care: The 102-link chain and 16/39 sprockets wear quickly under hard riding. Clean and lubricate every 500 km (310 miles).
4. Cooling System: The 1.8L liquid-cooling system needs annual flushing to prevent corrosion—a neglected step many owners overlook.
5. Carb Tuning: The air screw’s 1-1/8 turns factory setting is a starting point. Fine-tune for altitude and fuel quality.

At MOTOPARTS.store, we stock period-correct components, from NGK plugs to OE-spec gaskets, ensuring your LC stays true to its roots.

---

Conclusion: Why the RD 350 LC Still Matters

The Yamaha RD 350 LC isn’t just a relic—it’s a reminder of motorcycling’s raw, unadulterated era. Its combination of lightweight agility, explosive power, and minimalist design creates a riding experience that’s equal parts thrilling and demanding. For those willing to embrace its quirks (and keep a spare set of spark plugs handy), the LC offers a purity that modern electronics can’t replicate.

Whether you’re restoring one or upgrading your existing machine, MOTOPARTS.store has the expertise and parts to keep your RD 350 LC screaming for decades to come. Now, go twist that throttle—and let the two-stroke symphony play on.

---

Specifications sheet

---