Honda MSX 125 Grom (2021-2022): The Pint-Sized Powerhouse That Defies Expectations

Introduction

The Honda MSX 125 Grom isn’t just a motorcycle – it’s a cultural phenomenon wrapped in a miniature sporty silhouette. For the 2021-2022 generation, Honda doubled down on the formula that made the Grom a global hit: approachable dimensions, playful handling, and an irrepressible personality that turns every ride into a grin-inducing adventure. After spending a week with this pocket-sized warrior, it’s clear why urban commuters, weekend canyon carvers, and even seasoned riders keep coming back to the Grom. Let’s dissect what makes this Lilliputian legend tick.

Design & Ergonomics: Small Package, Big Attitude

The Grom’s design language shouts "fun" from every angle. The 2021-2022 models retain the signature upright stance with a neo-retro twist – imagine a sportbike shrunk in the wash but still mean-mugging through its LED headlight. Honda offered vibrant color schemes during these years, from the screaming Queen Bee Yellow to the stealthy Matte Black Metallic, all accented by contrasting wheel finishes.

At 761 mm (30 inches), the seat height is accessible even for shorter riders, while the 103 kg (227 lbs) curb weight makes it feel like a bicycle with ambitions. The LCD dash – a surprising premium touch – packs speedometer, twin trips, fuel gauge, and clock. My test unit’s Candy Blue finish (with optional ABS) drew constant attention, proving the Grom works as both transportation and conversation starter.

Engine & Performance: Slow Car Fast, Motorcycle Edition

Let’s address the elephant in the room: the 124.9cc air-cooled SOHC single-cylinder makes just 9.9 HP @ 7,250 RPM and 11 Nm (8.1 lb-ft) @ 6,000 RPM. On paper, that’s lawnmower territory. On pavement, it’s a revelation. The 5-speed gearbox (note: some 2021 models show 4-speed in data – confirm specs with your local market) sings through revs like a caffeine-addicted choirboy.

0-60 km/h (0-37 mph) arrives with surprising vigor, though highway speeds require commitment. The magic happens in urban canyons where the Grom’s 68 km/l (160 mpg) fuel efficiency and narrow profile let you slice through traffic like a two-wheeled sushi chef. The PGM-FI fuel injection ensures crisp throttle response, while the raspy exhaust note sounds disproportionately aggressive for something this cute.

Chassis & Handling: Pocket-Sized Precision

The steel mono-backbone frame and 1,200 mm (47.2") wheelbase create handling that’s equal parts stable and sprightly. Combine that with 31mm USD forks (99mm/3.9" travel) and a rear mono-shock (104mm/4.1" travel), and you’ve got a setup that laughs at potholes while carving corners like a Thanksgiving turkey.

Those 12-inch wheels should feel twitchy, but the 25-degree rake and 81mm (3.2") trail lend unexpected composure. Braking is handled by a 190mm front disc with 2-piston caliper and rear single-piston setup. The optional ABS (4 lbs heavier but worth it for rainy climates) inspires confidence without being intrusive.

The Riding Experience: Urban Playground Dominator

Throwing a leg over the Grom feels like unlocking cheat codes for city riding. Filtering through traffic? The 720mm (28.3") width slides through gaps that give scooters anxiety. Parking? Lift it like a bag of gym clothes. Curbs? 180mm (7.1") ground clearance scoffs at them.

But the real joy comes from riding at 10/10ths without ending up at 10/10ths of the speed limit. Redline shifts become routine, knee-down cornering requires just a brisk sidewalk pace, and U-turns happen within a parking stall. It’s motorcycle distilled to its most playful essence.

Competition: Small Bikes, Big Rivalries

The Grom’s success spawned fierce competition. Here’s how it stacks up:

1. Kawasaki Z125 Pro:
   Similar specs but with a 125cc fuel-injected engine. The Z125 matches the Grom’s power but feels slightly more aggressive in styling. However, it lacks the Grom’s aftermarket support and cult following.

2. KTM 125 Duke:
   The Austrian contender packs a liquid-cooled 125cc engine making 15 HP. While more powerful, it’s 23kg (51 lbs) heavier and lacks the Grom’s flickable nature. Perfect for riders wanting highway capability but less "playful" in tight spaces.

3. Benelli TNT 135:
   With a 134cc engine producing 13 HP, the Benelli offers more grunt. However, its heavier 121kg (267 lbs) weight and agricultural gearbox can’t match the Honda’s refinement.

Grom’s Edge: Unmatched parts availability, lower seat height (761mm vs Z125’s 815mm), and that X-factor that turns owners into evangelists.

Maintenance: Keeping the Mini Beast Roaring

The Grom’s simplicity is a mechanic’s dream, but don’t neglect these key points:

1. Oil Changes:
   Every 6,000 km (3,700 miles) with SAE 10W-30 (1.1L capacity). Pro tip: Use a torque wrench on the 12mm drain bolt – overtightening cracks the aluminum case.

2. Chain Care:
   The 15T/38T sprocket combo and 108-link chain need regular cleaning. Upgrade to an O-ring chain if you’re logging serious miles.

3. Valve Checks:
   Every 12,000 km (7,500 miles). Intake clearance: 0.08mm ±0.02mm (0.0031"), exhaust: 0.20mm ±0.02mm (0.0079"). Shims are tiny – keep track!

4. Brake Fluid:
   DOT 4 fluid changes every 2 years. The small reservoirs mean fluid degrades faster than in bigger bikes.

5. Spark Plugs:
   NGK CPR7EA-9S replacement every 12,000 km. Anti-seize compound is your friend here.

6. Tire Pressure:
   Maintain 29 PSI (2 bar) front/rear. The CST tires are durable but consider upgrading to Michelin City Grips for wet weather confidence.

MOTOPARTS.store Pro Recommendations:
- LED turn signals for better visibility
- Aftermarket exhaust (check local laws) for weight savings and better sound
- CNC rear sets for aggressive cornering
- Oil filter kit with magnetic drain plug

Customization: Your Canvas on Two Wheels

The Grom’s true superpower? It’s the LEGO of motorcycles. From stunt cages to big-bore kits, the aftermarket is limitless. Popular upgrades include:

• 143cc Big Bore Kits: Unlocks 15+ HP
• Öhlins Suspension: For parking lot GP ambitions
• Rental Handlebars: Improved leverage for hooliganism
• Clear Clutch Covers: Because showing off matters

Conclusion: More Than Just a Beginner Bike

The 2021-2022 Honda Grom proves that displacement numbers don’t define motorcycling joy. It’s a bike that turns grocery runs into adventures and commutes into comedy. Whether you’re a new rider building skills or a veteran rediscovering two-wheeled fun, the Grom delivers smiles per gallon that rival bikes costing ten times as much.

At MOTOPARTS.store, we’ve seen Groms transformed into track weapons, wheelie machines, and even mini tourers with saddlebags. Whatever your vision, this platform rewards customization like few others. So grab your helmet, embrace your inner hooligan, and remember – it’s not the size of the bike in the fight, but the size of the fight in the bike.

(All specifications subject to regional variations. Always consult your owner’s manual and local regulations before modifications.)

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Specifications sheet

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