1985 Yamaha YZ490 Overview, Reviews, Ratings & Specs
The 1985 Yamaha YZ490 is a potent dirt bike that cemented its legendary status in the motocross world. As part of the YZ series, it's a high-performance, off-road motorcycle designed for aggressive riding and competition. While specific trims were minimal, the YZ490 was the top-tier 490cc offering in Yamaha's YZ lineup for its era. Its popularity stems from its raw power, commanding presence, and capability on the track, making it a sought-after machine for enthusiasts and racers alike.
The Good
The 1985 YZ490 excels in raw, exhilarating power that thrills experienced riders. Its robust construction offers a sense of reliability for those who maintain it. The iconic YZ design evokes nostalgia and pride, while its straightforward mechanics appeal to practical owners.
The Bad
Owners should be aware of potential engine vibration, especially at lower RPMs. Clutch wear can be a concern with aggressive use. The suspension, while capable, might feel less refined by modern standards. Kickstarting can also require a strong leg.
1985 Yamaha YZ490: Quick Overview
- Engine Options: The 1985 Yamaha YZ490 featured a single engine option.
- Engine Type: It was powered by a 487cc, air-cooled, two-stroke, single-cylinder engine.
- Bore x Stroke: 87mm x 80mm
- Compression Ratio: Typically around 6.8:1
- Fuel System: A Mikuni VM34SS carburetor was standard.
- Ignition: CDI (Capacitor Discharge Ignition)
- Horsepower: Official figures often hovered around 40-45 horsepower, though some dyno tests suggest higher outputs. This was a significant amount of power for a dirt bike of its era, contributing to its reputation.
- Torque: Strong low-end and mid-range torque was a hallmark of the YZ490.
- Transmission: A 5-speed constant mesh manual transmission was fitted.
- Clutch: Wet, multi-disc manual clutch.
- Final Drive: Chain drive.
- Suspension (Front): 43mm telescopic forks with adjustable rebound damping. Travel varied, but was substantial for off-road use.
- Suspension (Rear): Monoshock with adjustable spring preload and damping (Yamaha's Monocross system).
- Brakes (Front): Disc brake.
- Brakes (Rear): Drum brake.
- Tires (Front): Typically 80/100-21
- Tires (Rear): Typically 110/100-18
- Frame: Steel semi-double cradle frame.
- Fuel Economy: As a high-performance two-stroke motocross bike, fuel economy was not a primary design consideration and would vary significantly based on riding style. Expect relatively low miles per gallon.
- 0-60 Times: Not applicable for a dirt bike; acceleration is measured by its ability to get out of corners and climb obstacles.
- Towing Capacity: Not applicable.
- Weight: Dry weight was approximately 236 lbs (107 kg), making it a relatively heavy bike for its class but manageable for experienced riders.
- Fuel Capacity: Around 2.6 gallons (9.8 liters).
- Trim-Level Features: The YZ490 was largely a single, high-performance model. Key features included its powerful two-stroke engine, the advanced Monocross rear suspension, strong disc front brake, and durable construction aimed at racing.
1985 Yamaha YZ490 Specifications
Vehicle Information
| Year | 1985 |
| Make | Yamaha |
| Model | YZ490 |
| Trim | - |
| Style | - |
| Type | - |
| Category | - |
Manufacturing Details
| Made In | Japan |
| Manufacturing City | - |
Dimensions
| Doors | - |
| Curb Weight | - |
| Gross Vehicle Weight Rating | - |
| Overall Height | - |
| Overall Length | - |
| Overall Width | - |
| Wheelbase Length | - |
| Standard Seating | - |
Engine & Performance
| Engine | - |
| Engine Size | - |
| Engine Cylinders | - |
| 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 1985 Yamaha YZ490 Have?
The 1985 Yamaha YZ490, like many high-performance two-strokes of its era, is known for certain characteristics that owners should be aware of. One of the most frequently reported aspects is engine vibration, particularly at lower RPMs, which can be exacerbated by the sheer power output of the 487cc two-stroke. While not necessarily a sign of impending failure, it can be felt by the rider and contribute to fatigue on longer rides.
Clutch wear is another common concern, especially for bikes that have been subjected to hard riding, aggressive racing, or frequent use in challenging terrain. The clutch plates can wear down over time, leading to slipping and a reduction in performance. Regular inspection and replacement of clutch components are part of standard maintenance for these machines.
While Yamaha generally produced robust engines, the two-stroke nature means that certain components are subject to wear and require diligent maintenance. Piston rings, seals, and gaskets will eventually need replacement. Overheating can also be an issue if the cooling system isn't properly maintained or if the bike is pushed too hard in extreme conditions.
Regarding recalls, specific recalls for the 1985 YZ490 are not widely publicized. However, as with any vintage motorcycle, it's always wise to check with Yamaha or specialized forums for any potential service bulletins or safety recalls that might have been issued retrospectively or are relevant to common wear items.
Long-term reliability concerns often revolve around the general maintenance required for a vintage two-stroke performance machine. If the bike has been neglected, ridden hard without proper care, or subjected to improper modifications, it can lead to premature wear on engine components, suspension linkages, and other critical parts. Conversely, a well-maintained 1985 YZ490, with regular top-end rebuilds and attention to its specific needs, can be surprisingly durable. There aren't widely known significant model-year-specific flaws that differentiate the 1985 model drastically from its immediate predecessors or successors in terms of common issues, beyond the general evolution of the YZ series.
Clutch wear is another common concern, especially for bikes that have been subjected to hard riding, aggressive racing, or frequent use in challenging terrain. The clutch plates can wear down over time, leading to slipping and a reduction in performance. Regular inspection and replacement of clutch components are part of standard maintenance for these machines.
While Yamaha generally produced robust engines, the two-stroke nature means that certain components are subject to wear and require diligent maintenance. Piston rings, seals, and gaskets will eventually need replacement. Overheating can also be an issue if the cooling system isn't properly maintained or if the bike is pushed too hard in extreme conditions.
Regarding recalls, specific recalls for the 1985 YZ490 are not widely publicized. However, as with any vintage motorcycle, it's always wise to check with Yamaha or specialized forums for any potential service bulletins or safety recalls that might have been issued retrospectively or are relevant to common wear items.
Long-term reliability concerns often revolve around the general maintenance required for a vintage two-stroke performance machine. If the bike has been neglected, ridden hard without proper care, or subjected to improper modifications, it can lead to premature wear on engine components, suspension linkages, and other critical parts. Conversely, a well-maintained 1985 YZ490, with regular top-end rebuilds and attention to its specific needs, can be surprisingly durable. There aren't widely known significant model-year-specific flaws that differentiate the 1985 model drastically from its immediate predecessors or successors in terms of common issues, beyond the general evolution of the YZ series.
How long will the 1985 Yamaha YZ490 last?
Estimating average mileage for a 1985 Yamaha YZ490 is challenging as these bikes were primarily used for racing and recreational off-road riding, often accumulating hours rather than miles. Many have been ridden extensively in shorter bursts. A well-maintained YZ490 could see years of service, with regular top-end rebuilds (piston, rings) every 50-100 hours of hard use. The bottom end (crankshaft, bearings) can last significantly longer, potentially hundreds of hours or more with proper care and gearbox oil changes.
Long-term durability is highly dependent on the owner's commitment to maintenance. Weaknesses over time often appear as worn clutch plates, suspension seals, and carburetor issues if not cleaned regularly. The two-stroke nature means that consistent use without proper decarbonization and lubrication will accelerate wear on the piston and cylinder. However, with diligent care, including regular oil changes, air filter cleaning, and periodic engine overhauls, the YZ490 is known to be a robust platform that can provide many years of thrilling performance.
Long-term durability is highly dependent on the owner's commitment to maintenance. Weaknesses over time often appear as worn clutch plates, suspension seals, and carburetor issues if not cleaned regularly. The two-stroke nature means that consistent use without proper decarbonization and lubrication will accelerate wear on the piston and cylinder. However, with diligent care, including regular oil changes, air filter cleaning, and periodic engine overhauls, the YZ490 is known to be a robust platform that can provide many years of thrilling performance.
What Technology & Safety Features are Included?
The 1985 Yamaha YZ490 is a purebred motocross machine, and as such, its technological features are focused entirely on performance and off-road capability, rather than comfort, entertainment, or advanced safety systems found in modern vehicles.
Built-in Tech: The primary technology integrated into the YZ490 is its mechanical and engineering prowess for its intended use. This includes the powerful 487cc two-stroke engine, designed for maximum power delivery. The Yamaha Monocross suspension system was considered advanced for its time, providing a single shock absorber for improved handling and ride quality over rough terrain compared to older twin-shock designs. The ignition system is CDI (Capacitor Discharge Ignition), offering reliable spark generation. The carburetor is a robust Mikuni unit, chosen for its performance characteristics.
Entertainment Features: There are no entertainment features on the 1985 Yamaha YZ490. This is an off-road competition motorcycle designed for the roar of the engine and the sounds of the track, not for audio systems or displays.
Driver-Assistance Features: Similarly, there are no driver-assistance features. The rider is entirely in control, and the bike is designed to respond directly to their input. Features like traction control, ABS, or electronic stability control were non-existent and not even conceptualized for dirt bikes of this era.
Safety Features: Safety features are minimal and largely consist of the inherent design of the motorcycle for its purpose. The front disc brake provides effective stopping power, and the rear drum brake offers additional control. The robust frame and suspension are designed to withstand the rigors of motocross. However, unlike street-legal motorcycles or cars, there are no passive safety systems like airbags or advanced crumple zones. The rider's safety relies heavily on their riding skill, protective gear (helmet, body armor, etc.), and the bike's mechanical integrity.
Optional Features: Optional features were typically limited to aftermarket accessories such as different exhaust systems, specialized tires, upgraded handlebars, or aftermarket graphics kits, all aimed at further enhancing performance or personalization for racing.
Crash-Test Ratings: Crash-test ratings are not applicable to the 1985 Yamaha YZ490. Such testing is reserved for vehicles intended for public roads and designed with occupant safety in mind. The focus for motocross bikes is durability under stress and rider control.
Built-in Tech: The primary technology integrated into the YZ490 is its mechanical and engineering prowess for its intended use. This includes the powerful 487cc two-stroke engine, designed for maximum power delivery. The Yamaha Monocross suspension system was considered advanced for its time, providing a single shock absorber for improved handling and ride quality over rough terrain compared to older twin-shock designs. The ignition system is CDI (Capacitor Discharge Ignition), offering reliable spark generation. The carburetor is a robust Mikuni unit, chosen for its performance characteristics.
Entertainment Features: There are no entertainment features on the 1985 Yamaha YZ490. This is an off-road competition motorcycle designed for the roar of the engine and the sounds of the track, not for audio systems or displays.
Driver-Assistance Features: Similarly, there are no driver-assistance features. The rider is entirely in control, and the bike is designed to respond directly to their input. Features like traction control, ABS, or electronic stability control were non-existent and not even conceptualized for dirt bikes of this era.
Safety Features: Safety features are minimal and largely consist of the inherent design of the motorcycle for its purpose. The front disc brake provides effective stopping power, and the rear drum brake offers additional control. The robust frame and suspension are designed to withstand the rigors of motocross. However, unlike street-legal motorcycles or cars, there are no passive safety systems like airbags or advanced crumple zones. The rider's safety relies heavily on their riding skill, protective gear (helmet, body armor, etc.), and the bike's mechanical integrity.
Optional Features: Optional features were typically limited to aftermarket accessories such as different exhaust systems, specialized tires, upgraded handlebars, or aftermarket graphics kits, all aimed at further enhancing performance or personalization for racing.
Crash-Test Ratings: Crash-test ratings are not applicable to the 1985 Yamaha YZ490. Such testing is reserved for vehicles intended for public roads and designed with occupant safety in mind. The focus for motocross bikes is durability under stress and rider control.
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.
1985 Yamaha YZ490 Prices and Market Value
When new, the 1985 Yamaha YZ490 would have retailed for a price competitive with other high-performance open-class motocross bikes of its era, likely in the range of $1,800 to $2,500 USD, adjusted for inflation. Its value proposition was its class-leading power and Yamaha's reputation for quality.
Today, the used market prices for a 1985 Yamaha YZ490 vary significantly based on condition, originality, and historical significance. Well-preserved, original examples, especially those that have been meticulously restored or maintained, can command prices from $3,000 to $7,000 USD or even higher for pristine, low-hour machines. Bikes in average or project condition can be found for considerably less, perhaps $1,000 to $2,500.
Depreciation for a motocross bike is rapid in the first few years as technology advances and newer models emerge. However, vintage motocross bikes like the YZ490 have seen their values appreciate as collectors and enthusiasts seek out iconic machines. Factors affecting resale value include originality of parts, maintenance records, completeness of documentation, any modifications (stock is generally preferred for collectors), and overall cosmetic and mechanical condition.
Today, the used market prices for a 1985 Yamaha YZ490 vary significantly based on condition, originality, and historical significance. Well-preserved, original examples, especially those that have been meticulously restored or maintained, can command prices from $3,000 to $7,000 USD or even higher for pristine, low-hour machines. Bikes in average or project condition can be found for considerably less, perhaps $1,000 to $2,500.
Depreciation for a motocross bike is rapid in the first few years as technology advances and newer models emerge. However, vintage motocross bikes like the YZ490 have seen their values appreciate as collectors and enthusiasts seek out iconic machines. Factors affecting resale value include originality of parts, maintenance records, completeness of documentation, any modifications (stock is generally preferred for collectors), and overall cosmetic and mechanical condition.
1985 Yamaha YZ490 Cost of Ownership
Owning a 1985 Yamaha YZ490 leans towards being moderately costly, primarily due to maintenance requirements rather than outright price. Insurance is generally minimal for off-road-only vehicles, often through specialized classic motorcycle policies. Fuel consumption is high, typical for a thirsty two-stroke. Maintenance is crucial: regular top-end rebuilds, chain and sprocket replacements, and suspension upkeep are essential. Repairs can vary; while parts are available for popular vintage models, labor costs for specialized two-stroke engine work can add up. It's not an economical daily rider but offers immense performance value for its recreational purpose. Enthusiasts often embrace the maintenance as part of the ownership experience.
1985 Yamaha YZ490 Fuel Efficiency
Fuel Type
-
Fuel Capacity
-
City Mileage
-
Highway Mileage
-
1985 Yamaha YZ490 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
1985 Yamaha YZ490 Insurance
Insurance for a 1985 Yamaha YZ490 is moderately priced, reflecting its status as a Vehicle with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 1985 Yamaha YZ490 Compare to Other Vehicle?
The 1985 Yamaha YZ490 stood tall in the open-class motocross segment, facing stiff competition from Japanese manufacturers. Its primary rivals included the Honda CR480R/CR500R, Suzuki RM465/RM500, and Kawasaki KX420/KX500.
Performance: The YZ490 was renowned for its brute torque and explosive power, often considered one of the most potent bikes in its class. Honda's CR500R was a formidable competitor, known for its smooth power delivery and sometimes more refined engine character. Suzuki's RM500 offered strong competition, often praised for its handling. Kawasaki's KX500, introduced shortly after, quickly became a legend for its sheer power and durability, often surpassing the YZ490 in outright grunt and top-end speed.
Features: In 1985, features were relatively similar across the board. All featured liquid-cooled (except some older models) or air-cooled two-stroke engines, advanced (for the time) suspension systems like Yamaha's Monocross, disc front brakes, and durable chassis. The YZ490's Monocross system was a key selling point, offering competitive suspension performance. Honda's Pro-Link and Suzuki's Full Floater systems were also highly regarded.
Reliability: Yamaha generally had a reputation for solid construction. However, vintage two-strokes require consistent maintenance. The YZ490 could be prone to vibration issues. The Honda CR500R gained a reputation for reliability and longevity, often considered bulletproof if maintained. Suzuki's RM series was generally reliable but could sometimes have specific electrical gremlins. The KX500 became legendary for its bomb-proof engine.
Price: New prices were competitive across these open-class bikes, reflecting their high-performance nature. In the used market today, prices fluctuate based on condition. The YZ490 is sought after for its raw power. However, the Kawasaki KX500 is often considered a more desirable long-term investment due to its enduring reputation for power and durability, and thus can command higher prices in excellent condition. The Honda CR500R also holds strong value.
Alternatives: For similar raw power and a thrilling vintage motocross experience, the Honda CR500R and Kawasaki KX500 are excellent alternatives. If slightly smaller displacement but still potent is desired, a Yamaha YZ250 or a Honda CR250R offers comparable handling and a more manageable powerband, which might be better for less experienced riders or those prioritizing agility. For a purely classic feel and a slightly different engine character, a Suzuki RM500 could also be considered.
Performance: The YZ490 was renowned for its brute torque and explosive power, often considered one of the most potent bikes in its class. Honda's CR500R was a formidable competitor, known for its smooth power delivery and sometimes more refined engine character. Suzuki's RM500 offered strong competition, often praised for its handling. Kawasaki's KX500, introduced shortly after, quickly became a legend for its sheer power and durability, often surpassing the YZ490 in outright grunt and top-end speed.
Features: In 1985, features were relatively similar across the board. All featured liquid-cooled (except some older models) or air-cooled two-stroke engines, advanced (for the time) suspension systems like Yamaha's Monocross, disc front brakes, and durable chassis. The YZ490's Monocross system was a key selling point, offering competitive suspension performance. Honda's Pro-Link and Suzuki's Full Floater systems were also highly regarded.
Reliability: Yamaha generally had a reputation for solid construction. However, vintage two-strokes require consistent maintenance. The YZ490 could be prone to vibration issues. The Honda CR500R gained a reputation for reliability and longevity, often considered bulletproof if maintained. Suzuki's RM series was generally reliable but could sometimes have specific electrical gremlins. The KX500 became legendary for its bomb-proof engine.
Price: New prices were competitive across these open-class bikes, reflecting their high-performance nature. In the used market today, prices fluctuate based on condition. The YZ490 is sought after for its raw power. However, the Kawasaki KX500 is often considered a more desirable long-term investment due to its enduring reputation for power and durability, and thus can command higher prices in excellent condition. The Honda CR500R also holds strong value.
Alternatives: For similar raw power and a thrilling vintage motocross experience, the Honda CR500R and Kawasaki KX500 are excellent alternatives. If slightly smaller displacement but still potent is desired, a Yamaha YZ250 or a Honda CR250R offers comparable handling and a more manageable powerband, which might be better for less experienced riders or those prioritizing agility. For a purely classic feel and a slightly different engine character, a Suzuki RM500 could also be considered.
Final Verdict: Is the 1985 Yamaha YZ490 a Good Vehicle?
The 1985 Yamaha YZ490 is ideal for experienced motocross riders, vintage racing enthusiasts, or collectors who appreciate raw, unfiltered power and a legendary piece of off-road history. It's not a beginner bike; its potent torque and aggressive powerband demand respect and skillful handling.
Whether it's worth buying depends heavily on the buyer's goals and the bike's condition. For vintage racing, it's an excellent choice, offering competitive performance. As a collector's item, a well-maintained original example is highly desirable.
It is absolutely a used purchase, as these were never sold new in decades. Buyers should prioritize bikes with comprehensive maintenance records, minimal wear, and preferably original components. A bike that has been recently rebuilt or is in excellent mechanical and cosmetic condition will offer the best ownership experience. Those looking for a more forgiving or modern riding experience might consider newer or smaller displacement models, but for pure, vintage open-class motocross excitement, the YZ490 remains a compelling option for the right enthusiast.
Whether it's worth buying depends heavily on the buyer's goals and the bike's condition. For vintage racing, it's an excellent choice, offering competitive performance. As a collector's item, a well-maintained original example is highly desirable.
It is absolutely a used purchase, as these were never sold new in decades. Buyers should prioritize bikes with comprehensive maintenance records, minimal wear, and preferably original components. A bike that has been recently rebuilt or is in excellent mechanical and cosmetic condition will offer the best ownership experience. Those looking for a more forgiving or modern riding experience might consider newer or smaller displacement models, but for pure, vintage open-class motocross excitement, the YZ490 remains a compelling option for the right enthusiast.
Cathleen V
Cathleen is an exceptional freelance writer covering hot topics in the automotive world from a gearhead's perspective. Her articles delve into various aspects of automotive technology and history, offering readers detailed insights into engine performance, reliability, and maintenance. Through her engaging and informative writing, Cathleen provides valuable information to automotive enthusiasts and consumers alike, helping them make informed decisions about vehicle maintenance and purchases.