The 2014 Yamaha YZ125 is a celebrated two-stroke motocross bike with a rich racing heritage. Known for its lightweight and agile motocross dirt bike body style, the YZ125 platform has enjoyed decades of refinement. While specific "trims" are uncommon, it typically comes in one highly capable configuration. With a new MSRP around $6,490 USD, its popularity stems from its incredible handling, potent two-stroke powerband, and status as a fantastic machine for developing advanced riding skills.
The Good
The 2014 Yamaha YZ125 boasts exceptional performance with its lightweight chassis and thrilling, responsive two-stroke engine. Its legendary reliability and simple maintenance appeal to practical buyers, while the iconic design and pure, exhilarating riding experience resonate emotionally. It offers great value due to its strong resale, durable components, and fantastic platform for skill development on the track.
The Bad
Known weaknesses for the 2014 Yamaha YZ125 include its need for frequent top-end rebuilds for competitive use, sensitivity to jetting changes with altitude/temperature, and limited low-end torque compared to four-strokes, requiring constant clutch work. It's less forgiving for casual trail riding where a broader powerband is often preferred.
2014 Yamaha YZ125: Quick Overview
The 2014 Yamaha YZ125 is a purpose-built motocross machine with a singular focus on performance.
- Engine Options: It features a single engine option: a 124cc, liquid-cooled, reed-valve inducted, two-stroke, single-cylinder engine with Yamaha's Power Valve System (YPVS).
- Horsepower: Factory horsepower figures are not always released, but it generally produces in the range of 34-36 horsepower at the crank, depending on tuning and conditions.
- Fuel Economy: Not officially rated, as it's an off-road competition vehicle. Fuel consumption varies wildly based on riding intensity, from approximately 20-30 MPG for casual riding to significantly less during racing. It requires pre-mixed premium fuel.
- 0-60 Times: Not applicable or measured for motocross bikes. However, with its lightweight and potent engine, acceleration is extremely rapid, likely achieving 0-60 mph in under 5 seconds.
- Towing Capacity: Not applicable. Motocross bikes are not designed for towing.
- Trim-Level Features: The YZ125 is essentially a single "trim" model, focused on optimal racing performance. Key features include:
- Chassis: Lightweight aluminum semi-double-cradle frame, lauded for its exceptional balance and agile handling.
- Suspension: Industry-leading, fully adjustable KYB Speed-Sensitive System (SSS) inverted front fork (48mm) offering excellent plushness and bottoming resistance, and a fully adjustable KYB piggyback rear shock providing 12.4 inches of travel.
- Brakes: Strong hydraulic disc brakes both front (250mm) and rear (245mm) for precise stopping power.
- Transmission: Close-ratio 6-speed manual transmission, optimized for keeping the engine in its powerband.
- Wheels & Tires: Standard 21-inch front and 19-inch rear wheels fitted with Dunlop MX51 knobby tires for aggressive off-road traction.
- Ergonomics: Slim bodywork, comfortable rider triangle, and adjustable handlebar mounts designed for aggressive riding postures.
- Fuel Capacity: 2.1-gallon fuel tank.
- Wet Weight: Approximately 207 lbs (94 kg), contributing to its legendary agility.
2014 Yamaha YZ125 Specifications
Vehicle Information
| Year | 2014 |
| Make | Yamaha |
| Model | YZ125 |
| Trim | - |
| Style | - |
| Type | Motorcycle |
| Category | Motorcycle |
Manufacturing Details
| Made In | Japan |
| Manufacturing City | IWATA |
Dimensions
| Doors | - |
| Curb Weight | - |
| Gross Vehicle Weight Rating | - |
| Overall Height | - |
| Overall Length | - |
| Overall Width | - |
| Wheelbase Length | - |
| Standard Seating | - |
Engine & Performance
| Engine | 124CC |
| Engine Size | 124L |
| Engine Cylinders | 1 |
| Transmission | - |
| Transmission Type | - |
| Transmission Speeds | - |
| Drivetrain | - |
Additional Features
| Anti-Brake System | - |
| Steering Type | - |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | - |
| Invoice Price | - |
| Delivery Charges | - |
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What Problems Does the 2014 Yamaha YZ125 Have?
The 2014 Yamaha YZ125 is renowned for its robust construction and reliability, but like any high-performance two-stroke, it has specific characteristics that require attention. Frequently reported "problems" are often part of its regular maintenance schedule rather than inherent flaws. The primary concern is top-end wear. For competitive riders, the piston and rings must be replaced every 20-40 hours of hard riding to prevent power loss and potential engine damage. Casual riders can extend this to 60-100 hours. Neglecting this leads to low compression and poor performance. The carburetor's jetting sensitivity is another common point; riders often need to adjust jets for optimal performance based on changes in altitude, temperature, and humidity, which can be a learning curve for new two-stroke owners. Clutch wear is also common due to the need to frequently use the clutch to keep the 125cc engine in its narrow powerband; clutch plates and springs are routine replacement items.
Regarding recalls, there were no widespread or significant safety recalls specifically issued for the 2014 Yamaha YZ125. Yamaha generally maintains a strong track record for quality in its off-road models.
Long-term reliability concerns mostly revolve around consistent maintenance. While the engine design is very durable, neglecting regular servicing—like air filter cleaning, transmission oil changes, and top-end replacements—will inevitably lead to costly repairs. Consumable items such as wheel bearings, linkage bearings, swingarm bearings, brake pads, and suspension seals will naturally wear out over time and require replacement, as is typical for any dirt bike exposed to harsh conditions. The excellent KYB SSS suspension and aluminum frame are known for their durability and hold up very well over many years of riding, provided they are not subjected to severe crash damage or extreme neglect. Parts availability is excellent, and the two-stroke engine's relative simplicity makes many repairs and rebuilds accessible to competent DIY mechanics.
Regarding recalls, there were no widespread or significant safety recalls specifically issued for the 2014 Yamaha YZ125. Yamaha generally maintains a strong track record for quality in its off-road models.
Long-term reliability concerns mostly revolve around consistent maintenance. While the engine design is very durable, neglecting regular servicing—like air filter cleaning, transmission oil changes, and top-end replacements—will inevitably lead to costly repairs. Consumable items such as wheel bearings, linkage bearings, swingarm bearings, brake pads, and suspension seals will naturally wear out over time and require replacement, as is typical for any dirt bike exposed to harsh conditions. The excellent KYB SSS suspension and aluminum frame are known for their durability and hold up very well over many years of riding, provided they are not subjected to severe crash damage or extreme neglect. Parts availability is excellent, and the two-stroke engine's relative simplicity makes many repairs and rebuilds accessible to competent DIY mechanics.
How long will the 2014 Yamaha YZ125 last?
For a 2014 Yamaha YZ125, "mileage" is typically measured in engine hours. A well-maintained YZ125 can provide many years of service, often 10-15 years or more, with proper care. Owner data suggests that with diligent maintenance, including top-end rebuilds every 20-100 hours (depending on riding intensity) and bottom-end rebuilds every 100-200 hours, the engine can be incredibly durable. The aluminum chassis and KYB SSS suspension components are exceptionally robust, often outlasting several engine rebuilds. Long-term durability is a major strength, attributed to Yamaha's solid engineering. However, weaknesses over time manifest in consumable items: wheel, steering, and linkage bearings will eventually need replacement due to dirt and moisture ingress, as will suspension seals and wear parts like chains, sprockets, and brake pads. These are standard wear items for any dirt bike, not specific flaws of the YZ125, and are manageable with routine maintenance.
What Technology & Safety Features are Included?
As a dedicated motocross racing machine, the 2014 Yamaha YZ125 prioritizes performance and essential rider controls over typical automotive "tech" features. Consequently, it lacks built-in entertainment, driver-assistance systems, or conventional safety features like airbags or ABS.
Its built-in tech is entirely performance-oriented:
Entertainment: There are no entertainment features whatsoever. The thrill of riding the bike itself is the entertainment.
Driver-Assistance: None. Riders are solely responsible for controlling the bike; there is no traction control, anti-lock braking system (ABS), or stability control.
Safety Features: Basic safety elements include powerful hydraulic disc brakes for effective stopping, a robust and predictable chassis, and aggressive knobby tires for maximum off-road traction. Rider safety on a motocross bike is overwhelmingly dependent on the rider's skill, appropriate protective gear (helmet, boots, pads, etc.), and the riding environment. There are no crash-test ratings available for motocross bikes, as they are not subject to the same regulatory standards as road vehicles.
Its built-in tech is entirely performance-oriented:
- Yamaha Power Valve System (YPVS): This sophisticated mechanical exhaust power valve dynamically alters exhaust port timing to broaden the two-stroke engine's powerband, providing a wider range of usable power from low to high RPMs, which is crucial for a 125cc bike.
- KYB Speed-Sensitive System (SSS) Fork: A standout feature, this highly adjustable 48mm inverted front fork provides speed-sensitive damping, offering exceptional compliance over small chop while resisting bottoming out on big impacts. This technology significantly contributes to the YZ125's renowned handling and plush ride. The fully adjustable KYB piggyback rear shock complements this system.
- Aluminum Frame: The lightweight, semi-double-cradle aluminum frame is a key technological advantage, offering superior rigidity and feel compared to older steel frames, directly improving agility and cornering precision.
- Digital CDI Ignition: Provides precise and consistent ignition timing across the RPM range for optimal power delivery and throttle response.
Entertainment: There are no entertainment features whatsoever. The thrill of riding the bike itself is the entertainment.
Driver-Assistance: None. Riders are solely responsible for controlling the bike; there is no traction control, anti-lock braking system (ABS), or stability control.
Safety Features: Basic safety elements include powerful hydraulic disc brakes for effective stopping, a robust and predictable chassis, and aggressive knobby tires for maximum off-road traction. Rider safety on a motocross bike is overwhelmingly dependent on the rider's skill, appropriate protective gear (helmet, boots, pads, etc.), and the riding environment. There are no crash-test ratings available for motocross bikes, as they are not subject to the same regulatory standards as road vehicles.
What Colors Options are Available?
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In the meantime, feel free to explore the other sections for more content.
In the meantime, feel free to explore the other sections for more content.
2014 Yamaha YZ125 Prices and Market Value
When new, the 2014 Yamaha YZ125 had an MSRP of approximately $6,490 USD. Today, current used market prices typically range from $3,000 to $5,000 USD, or even higher for bikes in exceptional condition with low hours. Prices fluctuate based on regional demand and overall bike health. The YZ125 demonstrates surprisingly strong resale value for an off-road vehicle, exhibiting less severe depreciation than many other motorcycles or cars. This is due to its legendary status, consistent performance, and the enduring popularity of 125cc two-strokes for learning and racing. Key factors affecting resale value include overall condition, documented maintenance history (especially engine rebuilds), engine compression, cosmetic appearance (plastics, graphics), and the presence of quality aftermarket upgrades. Bikes with fresh top-ends and well-maintained components command premium prices, while neglected examples will significantly decrease in value.
2014 Yamaha YZ125 Cost of Ownership
Long-term ownership of a 2014 Yamaha YZ125 can be considered moderate to high in cost, primarily due to its demanding maintenance schedule as a high-performance race machine. Insurance is generally affordable since it's not street legal. Fuel costs are notable as it requires premium gasoline pre-mixed with quality two-stroke oil, and aggressive riding can be thirsty. Maintenance is frequent: air filter cleaning, transmission oil changes, and chain care after every ride are crucial. More significantly, top-end engine rebuilds (piston/rings) are necessary every 20-100 hours depending on use. Repair costs are mitigated by readily available parts and the relative simplicity of two-stroke engines, often making DIY repairs feasible. Overall, it's not an "economical" vehicle in a conventional sense due to these ongoing performance-oriented expenses, but it offers immense value for its intended purpose.
2014 Yamaha YZ125 Fuel Efficiency
Fuel Type
Gasoline
Fuel Capacity
-
City Mileage
-
Highway Mileage
-
2014 Yamaha YZ125 Warranty
Basic
Original warranty
0 months / No data
Estimated remaining
Expired
Powertrain
Original warranty
0 months / No data
Estimated remaining
Expired
Rust
Original warranty
0 months / No data
Estimated remaining
Expired
2014 Yamaha YZ125 Insurance
Insurance for a 2014 Yamaha YZ125 is moderately priced, reflecting its status as a Motorcycle with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2014 Yamaha YZ125 Compare to Other Motorcycle?
The 2014 Yamaha YZ125 stands as a benchmark in the 125cc two-stroke motocross class, but it faces competition from both its direct rivals and larger four-stroke machines.
Against its primary two-stroke rival, the 2014 KTM 125 SX:
Against 250cc Four-Strokes (e.g., 2014 Yamaha YZ250F, Kawasaki KX250F, Honda CRF250R):
Recommendations:
However, for riders who value precise handling, lightweight agility, the unique two-stroke powerband, and a bike that teaches excellent riding technique, the 2014 Yamaha YZ125 remains an outstanding, highly recommended choice, arguably the best in its class for its era, especially on tighter tracks.
Against its primary two-stroke rival, the 2014 KTM 125 SX:
- Performance: Both are highly capable. The KTM often features a slightly more aggressive, harder-hitting powerband, while the YZ125 is celebrated for its smoother, more linear, and easier-to-manage power delivery.
- Features: KTMs sometimes boast hydraulic clutches and Brembo brakes. However, the YZ125's KYB Speed-Sensitive System (SSS) suspension is widely considered superior by many riders to the 2014 WP suspension on the KTM, offering better compliance and bottoming resistance.
- Reliability: Both are very reliable with proper maintenance. Yamaha's long-standing design and parts availability are strong points; KTM parts access has improved but was sometimes less consistent in the past.
- Price: New, their MSRPs were comparable. Used, prices are highly dependent on condition, but both hold value well.
Against 250cc Four-Strokes (e.g., 2014 Yamaha YZ250F, Kawasaki KX250F, Honda CRF250R):
- Performance: 250Fs offer significantly more low-end torque and mid-range power, making them generally easier and faster on longer straights or in deep conditions. The YZ125 requires more skill and constant momentum to keep up.
- Features: Both classes feature advanced chassis and suspension. 250Fs often have more complex engine management.
- Reliability/Maintenance: While a 250F might have longer service intervals for some components, a full four-stroke engine rebuild (valves, cams, crank) is typically far more complex and expensive than a two-stroke top-end rebuild.
- Price: 250Fs were more expensive new. Used, a YZ125 can maintain its value better than an older 250F, which depreciates more once major engine work looms.
Recommendations:
- Similar Alternatives: The 2014 KTM 125 SX is the most direct and comparable alternative, offering a slightly different feel.
- Better Alternatives (for specific needs): For riders seeking maximum raw power and less demanding riding, a 250cc four-stroke like the YZ250F is a "better" choice.
However, for riders who value precise handling, lightweight agility, the unique two-stroke powerband, and a bike that teaches excellent riding technique, the 2014 Yamaha YZ125 remains an outstanding, highly recommended choice, arguably the best in its class for its era, especially on tighter tracks.
Final Verdict: Is the 2014 Yamaha YZ125 a Good Motorcycle?
The 2014 Yamaha YZ125 is an exceptional machine ideal for intermediate to advanced riders, aspiring racers, and veterans who appreciate the classic two-stroke experience. It's perfect for those looking to hone their riding technique, demanding precise cornering, clutch control, and momentum. Its lightweight, agile chassis and superb KYB SSS suspension make it a joy to ride on tight, technical motocross tracks.
Is it worth buying? Absolutely, especially in the used market. It offers incredible performance and handling for its class, combined with robust reliability and straightforward maintenance. For its enduring capabilities and ability to teach fundamental racing skills, it's a fantastic investment.
Conditions for buying: As it's no longer sold new, focus on finding a well-maintained used example. Prioritize bikes with a clear service history, including recent top-end rebuilds and suspension maintenance. There are no specific trims to consider, so the bike's overall condition and any quality aftermarket additions are key. It's less suited for absolute beginners or riders seeking effortless low-end power, but for those ready to embrace its two-stroke characteristics and maintenance, the 2014 YZ125 offers an incredibly rewarding and competitive riding experience.
Is it worth buying? Absolutely, especially in the used market. It offers incredible performance and handling for its class, combined with robust reliability and straightforward maintenance. For its enduring capabilities and ability to teach fundamental racing skills, it's a fantastic investment.
Conditions for buying: As it's no longer sold new, focus on finding a well-maintained used example. Prioritize bikes with a clear service history, including recent top-end rebuilds and suspension maintenance. There are no specific trims to consider, so the bike's overall condition and any quality aftermarket additions are key. It's less suited for absolute beginners or riders seeking effortless low-end power, but for those ready to embrace its two-stroke characteristics and maintenance, the 2014 YZ125 offers an incredibly rewarding and competitive riding experience.
Simon A
Simon is a contributor to VinCheck, where he provides articles and reviews on various automotive topics. His work focuses on delivering accurate and up-to-date information about used cars, helping readers make informed decisions.