The 2018 Yamaha YZ450F is Yamaha's flagship motocross machine, boasting an aggressive off-road body style. This model year marked a significant redesign, beginning a new generation. Priced around $9,199 new, it notably stood out as the first production 450cc motocross bike to feature standard electric start and a revolutionary smartphone-based Power Tuner app, offering unparalleled engine tuning capability for riders. Its unique rearward-slanted engine design contributes to its popularity for excellent mass centralization and handling.
The Good
The 2018 YZ450F offers robust performance with strong, tractable power and class-leading KYB suspension for superior comfort. Its aggressive design and unique engine layout appeal emotionally, while Yamaha's renowned reliability and the practical Power Tuner app for easy customization enhance its value. It's a durable and competitive machine with good parts availability, making it a sound investment for serious riders.
The Bad
Known weaknesses for the 2018 Yamaha YZ450F include its slightly wider feel for some riders compared to slimmer rivals. The stock clutch can be a wear item for very aggressive riders. Some also find the initial throttle response a bit abrupt, though this is tunable with the Power Tuner app. The KYB SSS forks, while excellent, can be sensitive to precise setup.
2018 Yamaha YZ450F: Quick Overview
- Engine Options: Single engine option: Liquid-cooled, DOHC, 4-stroke, 4-valve, single cylinder.
- Displacement: 449cc.
- Bore x Stroke: 97.0mm x 60.8mm.
- Compression Ratio: 12.8:1.
- Fuel Delivery: Yamaha Fuel Injection (YFI), Mikuni 44mm.
- Ignition: TCI: Transistor Controlled Ignition.
- Transmission: Constant-mesh 5-speed; wet multi-plate clutch.
- Final Drive: Chain.
- Horsepower: Not officially published, estimated around 55-60 hp.
- Fuel Economy: Varies; typically 15-25 MPG during aggressive riding. Fuel tank capacity: 1.6 gallons.
- 0-60 Times: Not applicable for this type of vehicle.
- Towing Capacity: Not applicable.
- Trim-Level Features:
- Standard YZ450F:
- Electric Start: New for 2018, providing quick, convenient restarts.
- Yamaha Power Tuner App: Industry-first wireless smartphone engine tuning, allowing precise adjustments to fuel and ignition maps.
- New Aluminum Bilateral Beam Frame: Redesigned for improved cornering and stability.
- KYB Speed Sensitive System (SSS) Fork: Highly regarded, fully adjustable spring forks.
- KYB Rear Shock: Fully adjustable, complementing the frame for balanced handling.
- Engine Redesign: New cylinder head, lighter piston, revised cam profiles, and high-compression bridge-box piston for enhanced power and durability.
- New Radiator Design: Optimized for better airflow and cooling efficiency.
- Larger Diameter Axles: Contributes to improved rigidity and front-end feel.
- Adjustable Handlebar Mounts: Four positions for customized rider ergonomics.
- New Graphics and Bodywork: Sleeker and more compact design.
- Launch Control System (LCS): Aids in optimizing power delivery for faster starts.
- Larger 270mm Front Disc Brake: Provides enhanced stopping power.
- Standard YZ450F:
2018 Yamaha YZ450F Specifications
Vehicle Information
| Year | 2018 |
| Make | Yamaha |
| Model | YZ450F |
| 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 | 449cc 1cyl |
| Engine Size | 449L |
| Engine Cylinders | 1 |
| Transmission | 5 Motorcycle - Chain Drive |
| Transmission Type | Motorcycle - Chain Drive |
| Transmission Speeds | 5-Speed |
| 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 2018 Yamaha YZ450F Have?
The 2018 Yamaha YZ450F is generally regarded as a highly reliable machine, maintaining Yamaha's strong reputation for durability. However, like any high-performance motocross bike, there are a few frequently reported points to consider.
One common observation, particularly from aggressive riders, is the durability of the stock clutch pack. While adequate for most, competitive riders might find it wears out faster and often opt for aftermarket upgrades like Hinson clutches for enhanced performance and longevity.
The highly praised KYB SSS forks, while excellent, can be sensitive to setup. Some riders report needing precise adjustments or even professional re-valving to find the optimal 'sweet spot' for their weight and riding style. This isn't a "problem" per se, but rather a characteristic that demands attention during setup.
A minor issue occasionally noted is a slight tendency for the bike to "pull" to one side, which is typically rectified by ensuring proper fork and handlebar alignment.
Being the first year for electric start on the YZ450F, a few isolated reports of starter button or wiring glitches were noted early on, but these were not widespread and the system generally proved robust.
Some riders also found the initial throttle response a bit abrupt. This is easily mitigated by using the Yamaha Power Tuner App to slightly richen the low-end fuel delivery, making the power more tractable.
Recalls: As of current knowledge, there have been no major, widespread safety recalls specifically issued for the 2018 Yamaha YZ450F. Yamaha generally has a strong track record for quality control.
Long-Term Reliability Concerns: The 2018 YZ450F engine is built for durability. Long-term reliability is overwhelmingly dependent on diligent maintenance. Consistent oil changes, air filter cleaning, valve checks, and chassis lubrication are paramount. While engine rebuilds are part of a motocross bike's life cycle, the YZ450F is known for excellent durability between top-end and bottom-end refreshes compared to many competitors, provided it's maintained correctly. Neglecting air filter maintenance is the most common cause of premature engine wear.
One common observation, particularly from aggressive riders, is the durability of the stock clutch pack. While adequate for most, competitive riders might find it wears out faster and often opt for aftermarket upgrades like Hinson clutches for enhanced performance and longevity.
The highly praised KYB SSS forks, while excellent, can be sensitive to setup. Some riders report needing precise adjustments or even professional re-valving to find the optimal 'sweet spot' for their weight and riding style. This isn't a "problem" per se, but rather a characteristic that demands attention during setup.
A minor issue occasionally noted is a slight tendency for the bike to "pull" to one side, which is typically rectified by ensuring proper fork and handlebar alignment.
Being the first year for electric start on the YZ450F, a few isolated reports of starter button or wiring glitches were noted early on, but these were not widespread and the system generally proved robust.
Some riders also found the initial throttle response a bit abrupt. This is easily mitigated by using the Yamaha Power Tuner App to slightly richen the low-end fuel delivery, making the power more tractable.
Recalls: As of current knowledge, there have been no major, widespread safety recalls specifically issued for the 2018 Yamaha YZ450F. Yamaha generally has a strong track record for quality control.
Long-Term Reliability Concerns: The 2018 YZ450F engine is built for durability. Long-term reliability is overwhelmingly dependent on diligent maintenance. Consistent oil changes, air filter cleaning, valve checks, and chassis lubrication are paramount. While engine rebuilds are part of a motocross bike's life cycle, the YZ450F is known for excellent durability between top-end and bottom-end refreshes compared to many competitors, provided it's maintained correctly. Neglecting air filter maintenance is the most common cause of premature engine wear.
How long will the 2018 Yamaha YZ450F last?
Motocross bikes measure service life in hours, not miles. For a 2018 Yamaha YZ450F, a competitive rider might accumulate 50-100 hours annually, while recreational use could be 20-40 hours. With meticulous maintenance, the engine can reliably last several hundred hours before a major bottom-end rebuild. Top-end refreshes (piston/rings) are typically recommended every 30-60 hours for racers, or 60-100+ for casual riders. The 2018 YZ450F showcases strong long-term durability thanks to Yamaha's robust engine and chassis design; the electric start proved reliable. Weaknesses over time include routine wear items like suspension seals, wheel and swingarm bearings, and clutch components requiring periodic replacement. Neglecting air filter cleaning is the biggest threat to long-term engine health.
What Technology & Safety Features are Included?
As a dedicated competition motocross bike, the 2018 Yamaha YZ450F's "tech" focuses purely on performance and rider aids rather than traditional automotive features. There are no entertainment, driver-assistance, or crash-test ratings applicable to this type of vehicle.
Built-in Tech & Rider Aids:
Entertainment Features: None.
Driver-Assistance Features: None in the automotive sense. The LCS and Power Tuner App serve as performance aids for the rider.
Safety Features:
Optional Features: Factory options are generally non-existent for motocross bikes. Riders typically personalize their YZ450F with aftermarket exhaust systems, clutch components, wider footpegs, handguards, and various protection parts.
Built-in Tech & Rider Aids:
- Electric Start: A significant innovation for the 2018 model, making it the first production 450cc motocross bike with electric start. This feature greatly enhances convenience, especially for quick restarts during a race, powered by a lightweight lithium-ion battery.
- Yamaha Power Tuner App: This revolutionary feature allows riders to wirelessly connect to the bike's ECU via a smartphone app. It provides an unprecedented level of adjustability, enabling riders to fine-tune fuel and ignition timing maps, monitor engine run time, diagnose issues, and even share settings. This customization is invaluable for adapting to different track conditions or rider preferences.
- Launch Control System (LCS): Integrated into the ECU, the LCS helps optimize engine output for explosive starts off the gate. It modifies power delivery to minimize wheelspin and wheelies, maximizing traction for a quicker holeshot.
- Advanced Engine Design: The DOHC 4-valve engine features a unique rearward-slanted cylinder and reverse cylinder head, which contributes to mass centralization for enhanced handling and balance.
- Fuel Injection (YFI): Ensures precise fuel metering, leading to crisp throttle response and optimal power delivery across the entire RPM range.
- KYB Speed Sensitive System (SSS) Forks & KYB Rear Shock: These are high-performance, fully adjustable suspension components that allow riders to fine-tune compression and rebound damping for various conditions and preferences.
Entertainment Features: None.
Driver-Assistance Features: None in the automotive sense. The LCS and Power Tuner App serve as performance aids for the rider.
Safety Features:
- Powerful Brakes: Equipped with a large 270mm front disc and 245mm rear disc for strong, controllable stopping power.
- Adjustable Ergonomics: Adjustable handlebar mounts allow riders to customize the cockpit for better control and comfort.
- Lightweight Chassis: Contributes to agile handling and improved rider control.
Optional Features: Factory options are generally non-existent for motocross bikes. Riders typically personalize their YZ450F with aftermarket exhaust systems, clutch components, wider footpegs, handguards, and various protection parts.
What Colors Options are Available?
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2018 Yamaha YZ450F Prices and Market Value
When new, the 2018 Yamaha YZ450F had an MSRP of approximately $9,199 USD. In today's used market (late 2023 / early 2024), prices typically range from $4,500 to $6,500 USD, depending heavily on condition, hours, and maintenance. Motocross bikes, like most powersports, experience significant initial depreciation. However, the 2018 YZ450F holds its value relatively well due to its groundbreaking features like electric start and the Power Tuner app, which keep it relevant. Factors impacting resale value include overall condition (cosmetic and mechanical), documented maintenance history, low engine hours, and the quality of any aftermarket modifications. A clean, well-cared-for bike with fresh wear items will always command a higher price.
2018 Yamaha YZ450F Cost of Ownership
Insurance: Typically minimal, often limited to theft or storage, as it's not street-legal.
Fuel: Requires premium unleaded. Consumption is high during aggressive riding; a 1.6-gallon tank lasts about 40-60 minutes of hard riding.
Maintenance: Frequent and critical. Oil changes every 5-10 hours, air filter cleaning every ride in dusty conditions, valve checks every 30-60 hours, and regular suspension service.
Repair: Expect recurring costs for wear items: tires, chains, sprockets, brake pads, and clutch components. Engine rebuilds (top-end and eventually bottom-end) are significant expenses.
Long-Term Ownership: The 2018 YZ450F is costly to own if ridden regularly and competitively due to the intensive, frequent maintenance and replacement of high-performance wear parts required to keep it in peak condition. Recreational ownership will be less demanding but still requires consistent upkeep.
Fuel: Requires premium unleaded. Consumption is high during aggressive riding; a 1.6-gallon tank lasts about 40-60 minutes of hard riding.
Maintenance: Frequent and critical. Oil changes every 5-10 hours, air filter cleaning every ride in dusty conditions, valve checks every 30-60 hours, and regular suspension service.
Repair: Expect recurring costs for wear items: tires, chains, sprockets, brake pads, and clutch components. Engine rebuilds (top-end and eventually bottom-end) are significant expenses.
Long-Term Ownership: The 2018 YZ450F is costly to own if ridden regularly and competitively due to the intensive, frequent maintenance and replacement of high-performance wear parts required to keep it in peak condition. Recreational ownership will be less demanding but still requires consistent upkeep.
2018 Yamaha YZ450F Fuel Efficiency
Fuel Type
Gasoline
Fuel Capacity
-
City Mileage
-
Highway Mileage
-
2018 Yamaha YZ450F 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
2018 Yamaha YZ450F Insurance
Insurance for a 2018 Yamaha YZ450F is moderately priced, reflecting its status as a Motorcycle with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2018 Yamaha YZ450F Compare to Other Motorcycle?
The 2018 Yamaha YZ450F faced fierce competition in the 450cc motocross class, primarily from the Honda CRF450R, Kawasaki KX450F, KTM 450 SX-F, Husqvarna FC450, and Suzuki RM-Z450.
Performance: The YZ450F offered strong, linear power delivery, excellent straight-line stability, and plush, class-leading KYB SSS suspension. Its handling was predictable, though some found it slightly less agile than the KTM/Husqvarna. The Honda CRF450R was known for sharp handling and an aggressive engine but could feel twitchy. The KTM 450 SX-F and Husqvarna FC450 were lauded for being lightweight, powerful, and nimble with high-quality WP suspension. The Kawasaki KX450F had good low-end grunt, while the Suzuki RM-Z450 was known for exceptional cornering but lagged in engine performance and suspension rigidity.
Features: The YZ450F stood out significantly with standard electric start and the groundbreaking Yamaha Power Tuner App for wireless engine tuning – features that set it apart. KTM and Husqvarna also offered standard electric start and a hydraulic clutch, plus premium components. Honda offered electric start as an option, while Kawasaki and Suzuki were still kick-start only for 2018, which was a notable disadvantage.
Reliability: Yamaha, Honda, and Kawasaki generally share strong reputations for engine durability, and the YZ450F upheld this. KTM and Husqvarna are also highly reliable but often perceived to require more precise adherence to maintenance schedules. Suzuki is dependable but less competitive overall.
Price (New 2018 MSRP): The YZ450F was competitively priced around $9,199, similar to Honda and Kawasaki. KTM and Husqvarna commanded a premium at ~$9,999 due to their high-end componentry. Suzuki was typically the lowest priced around $8,949.
Alternatives:
Performance: The YZ450F offered strong, linear power delivery, excellent straight-line stability, and plush, class-leading KYB SSS suspension. Its handling was predictable, though some found it slightly less agile than the KTM/Husqvarna. The Honda CRF450R was known for sharp handling and an aggressive engine but could feel twitchy. The KTM 450 SX-F and Husqvarna FC450 were lauded for being lightweight, powerful, and nimble with high-quality WP suspension. The Kawasaki KX450F had good low-end grunt, while the Suzuki RM-Z450 was known for exceptional cornering but lagged in engine performance and suspension rigidity.
Features: The YZ450F stood out significantly with standard electric start and the groundbreaking Yamaha Power Tuner App for wireless engine tuning – features that set it apart. KTM and Husqvarna also offered standard electric start and a hydraulic clutch, plus premium components. Honda offered electric start as an option, while Kawasaki and Suzuki were still kick-start only for 2018, which was a notable disadvantage.
Reliability: Yamaha, Honda, and Kawasaki generally share strong reputations for engine durability, and the YZ450F upheld this. KTM and Husqvarna are also highly reliable but often perceived to require more precise adherence to maintenance schedules. Suzuki is dependable but less competitive overall.
Price (New 2018 MSRP): The YZ450F was competitively priced around $9,199, similar to Honda and Kawasaki. KTM and Husqvarna commanded a premium at ~$9,999 due to their high-end componentry. Suzuki was typically the lowest priced around $8,949.
Alternatives:
- Similar Alternatives: The 2018 KTM 450 SX-F and Husqvarna FC450 are very strong rivals, often considered "better" by riders prioritizing ultimate lightness and a hydraulic clutch. The Honda CRF450R (with optional electric start) also offers sharp handling and competitive power.
- Verdict on Alternatives: While KTM/Husqvarna often lead in lightweight design, the YZ450F's blend of strong power, excellent suspension, and particularly the game-changing Power Tuner app made it an incredibly well-rounded and user-friendly package. "Better" often depends on rider preference; the Yamaha was arguably the most technologically advanced and adaptable bike for 2018.
Final Verdict: Is the 2018 Yamaha YZ450F a Good Motorcycle?
The 2018 Yamaha YZ450F is ideal for a broad spectrum of motocross riders, from intermediate to expert, who seek a powerful, stable, and technologically advanced machine. It caters especially to those who appreciate cutting-edge features like electric start and the unparalleled customization offered by the Power Tuner app. Its plush KYB suspension and predictable handling instill confidence.
Is it worth buying? Absolutely. As a used vehicle, the 2018 YZ450F represents excellent value. Being a significant redesign year, it offers modern features and performance that still compete strongly with much newer models, avoiding obsolescence. There are no specific trims to consider, simplifying the choice.
Under what conditions? Purchase a used model with a well-documented maintenance history and lower engine hours to maximize value. It's an outstanding choice for anyone wanting a reliable, high-performance 450cc motocross bike that's easily tunable to their style or track conditions, provided they are prepared for the inherent, ongoing maintenance costs of a competition-focused motorcycle.
Is it worth buying? Absolutely. As a used vehicle, the 2018 YZ450F represents excellent value. Being a significant redesign year, it offers modern features and performance that still compete strongly with much newer models, avoiding obsolescence. There are no specific trims to consider, simplifying the choice.
Under what conditions? Purchase a used model with a well-documented maintenance history and lower engine hours to maximize value. It's an outstanding choice for anyone wanting a reliable, high-performance 450cc motocross bike that's easily tunable to their style or track conditions, provided they are prepared for the inherent, ongoing maintenance costs of a competition-focused motorcycle.
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.