Yamaha YZ 85 [2022 - 2022]: A Pocket Rocket Built to Dominate the Dirt

Introduction

The Yamaha YZ 85 has long been the gateway drug to motocross madness for young riders and lightweight thrill-seekers. The 2022 iteration continues this legacy with refinements that make it sharper, more responsive, and better suited to carving ruts than ever before. After spending a day wrestling this 73 kg (161 lb) two-stroke beast around a motocross track and tight trails, one thing becomes clear: this isn’t just a "starter bike." It’s a precision tool for riders who want to learn aggression, finesse, and the art of controlling chaos.

Let’s dissect why this machine remains a favorite – and where it pushes riders to upgrade components for personalized performance.

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Engine Performance: Two-Stroke Thunder in a Compact Package

At the heart of the YZ 85 lies its 85cc liquid-cooled two-stroke engine, delivering a ferocious powerband that demands respect. The 47.5 x 47.8 mm (1.9 x 1.9 in) bore and stroke configuration prioritizes mid-to-high-range punch, which hits like a switchblade when the revs climb. The Keihin PWK 28 carburetor – a stalwart of simplicity – provides crisp throttle response, though modern riders might crave fuel injection’s consistency on cold mornings.

Key Observations:
- Low-End: Requires clutch work to avoid bogging, ideal for teaching throttle control.
- Mid-Range Surge: The reed-valve induction screams to life around 7,000 RPM, lofting the front wheel effortlessly.
- Top-End Scream: Peak power arrives in a frenzied rush, maxing out at ~11,500 RPM. Novices will white-knuckle the grips; veterans will grin maniacally.

The 6-speed transmission shifts with a satisfying click, though the wet multi-disc clutch can feel heavy during prolonged technical sections. A stiffer clutch spring (available through MOTOPARTS.store) alleviates fade during hard riding.

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Chassis and Handling: Agile Meets Predictable

Yamaha’s semi-double-cradle frame strikes a balance between flex and rigidity. At 1,255 mm (49.4 in) wheelbase, the YZ 85 flicks through berms with almost telepathic responsiveness. The 2022 updates – a flatter seat and narrower fuel tank – let riders shift weight more effectively, crucial for cornering and airborne adjustments.

Ergonomics Breakdown:
- Seat Height: 841 mm (33.1 in) on the standard model (884 mm/34.8 in for the YZ85LW) accommodates growing riders.
- Weight Distribution: 43% front/57% rear encourages rear-wheel steering – perfect for slides.
- Ground Clearance: 320 mm (12.6 in) clears most obstacles, though rocky terrain demands skid plates.

The Large Wheel (LW) variant adds 19"/16" wheels (vs. 17"/14"), boosting stability at speed and improving roll-over capability on rough trails.

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Suspension and Brakes: Adjustability for Days

Fully adjustable 36 mm USD forks (274 mm/10.8 in travel) and a rear shock (282 mm/11.1 in travel) handle everything from MX track landings to trail trash. Stock settings err toward stiffness – a blessing for aggressive riders but harsh on slower trails.

Braking Notes:
- Front/Rear Hydraulic Discs: Plenty of bite for 85cc speeds, though sintered pads (available postmarket) improve fade resistance.
- Lever Feel: Adjustable levers cater to smaller hands, but braided steel lines sharpen responsiveness.

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Competition: How the YZ 85 Stacks Up

KTM 85 SX

• Strengths: Electric starter, 5% sharper powerband.
• Weaknesses: Stiffer maintenance schedule, pricier parts.
• YZ 85 Edge: More forgiving chassis, cheaper rebuilds.

Kawasaki KX85

• Strengths: Softer suspension for beginners.
• Weaknesses: Heavier (77 kg/170 lb), vague clutch feel.
• YZ 85 Edge: Superior cornering precision.

Husqvarna TC 85

• Strengths: Magura clutch, CNC triple clamps.
• Weaknesses: Premium price for minor gains.
• YZ 85 Edge: Broader aftermarket support.

Verdict: The YZ 85 wins on accessibility and tunability. It’s the Swiss Army knife of small-bore MX bikes – not the outright best at anything, but reliably competitive everywhere.

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Maintenance: Keeping the Beast Alive

1. Two-Stroke Simplicity

• Premix Ratio: Yamaha recommends 30:1, but 32:1 with synthetic oil reduces spooge. Stock up on quality 2T oil.
• Carb Tuning: Clean the Keihin PWK 28 every 15-20 hours. Jet kits help altitude/temperature adjustments.

2. Suspension Care

• Fork Seals: Replace every 50 hours. Use SKF seals for longevity.
• Linkage Bearings: Grease monthly if ridden in mud/sand.

3. Engine Longevity

• Piston Changes: Every 25-30 hours for racers; 40-50 for casual riders.
• Reed Valve Inspection: Check for gaps/chips every 15 hours.

4. Upgrade Opportunities

• Exhaust: Aftermarket pipes (e.g., FMF Fatty) broaden power delivery.
• Grips/Levers: ProTaper grips and ASV levers reduce arm pump.
• Air Filter: Twin-air filters with pre-cleaners boost airflow.

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Conclusion: A Cult Classic for a Reason

The 2022 Yamaha YZ 85 isn’t just a bike – it’s a rite of passage. It teaches riders to respect momentum, master clutch modulation, and attack corners with surgical precision. While purists will debate two-stroke vs. four-stroke until the sun explodes, the YZ 85’s raw feedback and unapologetic aggression keep it relevant.

Final Tip: Pair this bike with a torque wrench, a jet kit, and a willingness to learn. The results? Priceless.

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Ready to personalize your YZ 85? Explore MOTOPARTS.store’s curated selection of performance upgrades, maintenance kits, and rider essentials. From carb jets to skid plates – we’ve got your back (and your bike’s).

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Specifications sheet

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