Husqvarna TC 125 [2021-2023]: A Two-Stroke Motocross Refined for Modern Racing

Introduction

The Husqvarna TC 125 represents a fascinating blend of old-school two-stroke aggression and modern motocross engineering. Produced from 2021 to 2023, this bike carries the legacy of Husqvarna’s off-road dominance while integrating updates that keep it competitive in today’s MX2 and amateur racing circuits. Designed for riders who crave lightweight agility and the raw power delivery of a 125cc two-stroke, the TC 125 is a machine that demands skill but rewards with exhilarating performance. After spending a day thrashing it on a technical motocross track, here’s why this bike stands out—and where it might leave you wanting more.

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Engine Performance: The Heart of a Two-Stroke Beast

Power Delivery and Throttle Response

At the core of the TC 125 lies its 124.8cc liquid-cooled single-cylinder two-stroke engine. The 2021-2022 models feature a Mikuni TMX 38mm carburetor, while 2023 upgrades to fuel injection (Vitesco Technologies EMS) for sharper throttle response and better altitude compensation. With 40 HP (29.2 kW) on tap, the powerband is classic two-stroke: a playful mid-range surge that crescendos into a screaming top-end.

Riding the carbureted version, you’ll need to work the clutch to keep the revs in the sweet spot, especially in tight corners. The injected 2023 model smooths out low-end hesitation, making it more forgiving for less experienced riders. Both versions thrive on aggression—the harder you rev, the more it rewards. Fuel capacity varies slightly: 8L (2.11 gallons) in earlier models vs. 7.2L (1.90 gallons) in 2023, but neither feels restrictive for 30-minute motos.

Transmission and Clutch

The 6-speed gearbox is crisp, with ratios tailored for motocross. Shorter gears keep the engine in its powerband, while the Magura (2021-2022) and Brembo (2023) hydraulic clutches offer buttery modulation. Even during hard laps, fade is minimal—a critical advantage when battling arm pump.

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Chassis and Handling: Precision Meets Lightweight Agility

Frame and Suspension

Husqvarna’s 25CrMo4 steel double-cradle frame is a masterpiece. Paired with WP XACT suspension—48mm USD forks up front and a linkage-mounted monoshock—the TC 125 floats over braking bumps and lands jumps with poise. Earlier models have 310mm front / 300mm rear wheel travel, slightly reduced to 305mm/293mm in 2023 for sharper cornering.

At 87.5 kg (192.9 lbs) dry weight (2021-2022) or 92.5 kg (203.9 lbs) for the injected 2023 model, the TC 125 feels almost telepathic. Flicking it through rhythm sections requires minimal effort, and the 26.1° rake strikes a balance between stability and quick steering.

Brakes and Wheels

Brembo brakes are a standout. The twin-piston front caliper bites hard yet controllably, while the single-piston rear avoids lockups on loose terrain. Dunlop Geomax MX33 tires (2023 Heritage edition) provide predictable grip, though hardpack riders might prefer a softer compound.

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Ergonomics: Built for Attack

With a 940mm (37-inch) seat height, the TC 125 suits riders 165cm (5’5”) and taller. The narrow bodywork makes it easy to shift weight forward during corner entry, and the grippy seat keeps you planted over jumps. Standing up feels natural, thanks to a 1485mm (58.5-inch) wheelbase that never feels twitchy. Ground clearance drops from 375mm (14.8 inches) to 350mm (13.8 inches) in later models—a trade-off for lower center of gravity.

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Competition: How It Stacks Up

KTM 125 SX

The TC 125’s orange cousin shares its engine and chassis DNA but uses a different suspension tune (WP AER forks) and aesthetics. KTM’s setup favors slightly stiffer damping, which experts might prefer on high-speed tracks. However, Husqvarna’s linkage rear suspension offers better mid-stroke support for technical sections.

Yamaha YZ125

Yamaha’s stalwart two-stroke retains a carburetor and steel frame. While the YZ125 has a loyal following, its 5-speed gearbox and dated suspension can’t match the TC 125’s refinement. The Husky’s hydraulic clutch and Brembo brakes also outclass Yamaha’s cable-operated components.

GasGas MC 125

Another sibling from the Pierer Mobility Group, the GasGas MC 125 is nearly identical mechanically but lacks Husqvarna’s premium finishes. For riders prioritizing value over brand cachet, GasGas is a contender—but the TC 125’s composite subframe and CNC-machined triple clamps justify the price gap.

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Maintenance: Keeping Your TC 125 Race-Ready

Engine Care

Two-strokes thrive on attention. Use high-quality synthetic oil (like Motorex Cross Power 2T) at a 40:1 mix ratio. Rebuild intervals depend on usage—amateurs can stretch to 50 hours, but pros should inspect pistons every 15-20 hours. The 2023 fuel-injected model simplifies jetting headaches but still requires regular air filter cleaning (consider Twin Air’s dual-stage filter for dusty conditions).

Suspension and Brakes

WP suspension benefits from frequent oil changes—every 30 hours for casual riders, 10-15 for racers. Upgrade to SKF seals for longer service life. Brake fluid (DOT 4/5.1) should be flushed annually to prevent moisture buildup.

Chain and Sprockets

The 520 chain demands consistent lubrication. DID’s ERT3 offers durability, while Supersprox stealth sprockets reduce unsprung weight. Check alignment often to prevent premature wear.

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Conclusion: A Two-Stroke for the Purist—and the Progressive

The Husqvarna TC 125 isn’t just a bike—it’s a statement. For riders raised on four-strokes, its powerband might feel demanding, but mastering it is deeply satisfying. The 2021-2023 updates (especially fuel injection) ensure it remains relevant in an era dominated by thumpers. Whether you’re chasing podiums or just love the smell of premix, this Husky delivers adrenaline by the liter. And when parts wear out—or you’re ready to tweak its setup—MOTOPARTS.store has the upgrades to keep it biting at the lead pack’s heels.

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Specifications sheet

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