ARCTIC CAT 4639-493 Twinspar Nos Windshield 7-11

( Brand: Arctic Cat ), ( Manufacturer Part Number: 4639-493 ), ( Part Type: Windshield )

Review ARCTIC CAT Twinspar 7-11 Nos Chrome Green Windshield

The Arctic Cat Twinspar 7-11 NOS Windshield is a meticulously engineered, high-performance snowmobile designed for riders who demand both exhilarating speed and uncompromising reliability in the most demanding winter conditions. Built upon Arctic Cat s legendary Twinspar chassis a lightweight yet ultra-strong aluminum frame with a patented "twin spar" construction this model delivers an unmatched blend of agility, durability, and handling precision. The NOS (No Other Snowmobile) designation underscores its status as a premium, factory-fresh machine, free from any modifications or compromises, ensuring that every component from the high-revving 1,050cc V-twin engine to the precision-crafted drivetrain operates at peak efficiency. The 7-11 refers to the model s mid-range displacement, striking a perfect balance between torque for climbing steep terrain and top-end speed for cruising across open trails or groomed backcountry. Under the hood, the engine roars with Arctic Cat s signature power delivery, featuring a high-lift camshaft, dual overhead cams, and a fuel-injected system that optimizes performance across a wide RPM range, all while maintaining fuel efficiency and low emissions compliance.

The Twinspar 7-11 NOS Windshield comes equipped with a full windshield, a thoughtful inclusion that enhances rider comfort and control during high-speed runs or in inclement weather, reducing wind fatigue and improving visibility without sacrificing aerodynamics. The suspension is a standout feature, with a fully adjustable front and rear system that allows riders to fine-tune damping, rebound, and preload settings to match their weight, riding style, and terrain demands. Whether tackling icy trails, deep powder, or technical jumps, the suspension s responsive tuning ensures a smooth, planted ride while absorbing impacts with minimal energy loss. The braking system is equally impressive, featuring four-piston calipers and a durable disc setup that provides consistent stopping power in all conditions, even when laden with gear or towing a sled.

For those who prioritize off-trail versatility, the Twinspar 7-11 NOS Windshield is equipped with Arctic Cat s legendary "Twin-Spar" skis, which are engineered for both on-snow performance and off-snow adaptability. The skis feature a unique, asymmetrical design that enhances floatation in deep snow while maintaining sharp edge control on ice or hardpack. The track is a robust, high-quality rubber compound that grips surfaces with precision, reducing slippage and improving traction in slippery conditions. The overall package is completed with a durable, high-strength steel track frame and a robust exhaust system that not only delivers powerful sound but also ensures efficient heat dissipation for optimal engine longevity.

Comfort and convenience are not overlooked in this high-performance machine. The ergonomic seating position, adjustable foot pegs, and heated grips (available as an optional upgrade) ensure that long rides remain comfortable, even in sub-zero temperatures. The instrument cluster is intuitive and easy to read, displaying critical data such as speed, RPM, fuel level, and engine temperature with clarity, while the digital display offers additional features like trip odometer and average speed tracking. The overall build quality reflects Arctic Cat s reputation for craftsmanship, with meticulous attention to detail in every weld, finish, and component placement. Whether you re a seasoned competitor, a weekend warrior, or a backcountry explorer, the Twinspar 7-11 NOS Windshield is a testament to Arctic Cat s commitment to pushing the boundaries of snowmobile innovation delivering a machine that is as capable as it is captivating.

### **Pros and Cons of Buying an Arctic Cat 4639-493 TwinSpar 7-11 NOS (No-Overseas Spec) with No Windshield**

1. **Reliability and Durability** Arctic Cat engines are known for their strong build quality, longevity, and ability to handle rough terrain. The TwinSpar frame is particularly robust, offering stability and resistance to fatigue over time.

2. **Performance** The 493cc two-stroke engine delivers strong power output, making it suitable for aggressive riding, towing, and off-road use. The NOS (No-Overseas Spec) version may have slight differences in emissions or fuel requirements compared to international models, but it retains the core performance characteristics.

3. **Classic ATV Appeal** The 4639 model is a well-regarded classic, especially among collectors and enthusiasts who appreciate its vintage design and mechanical simplicity. The lack of a windshield is often preferred by riders who prioritize visibility and airflow.

4. **Easier Maintenance** Two-stroke engines are generally simpler to service than four-strokes, with fewer components requiring regular attention. The NOS version avoids potential compatibility issues with aftermarket parts designed for overseas models.

5. **Lower Cost of Ownership (Compared to Modern ATVs)** Parts and labor for older Arctic Cats are often cheaper than for newer models, and the engine s simplicity can reduce long-term maintenance expenses.

6. **Off-Road Capability** The lightweight frame and powerful engine make this ATV well-suited for trails, rocks, and rough terrain, where its agility and torque come into play.

7. **Customization Potential** Without a windshield, riders have more freedom to modify the ATV with aftermarket parts, such as aftermarket seats, exhausts, or suspension upgrades.

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1. **Age and Wear** As a NOS (No-Overseas Spec) model, this ATV is likely older, meaning it may require significant maintenance or restoration work. Rust, worn suspension, and outdated components (e.g., carburetions, belts, or seals) could be issues.

2. **Emissions and Fuel Efficiency** Two-stroke engines are less fuel-efficient and produce more emissions than modern four-strokes. The NOS version may not meet current environmental standards, limiting where it can be legally ridden in some areas.

3. **Lack of Modern Safety Features** Older ATVs lack modern safety advancements such as electronic stability control, better braking systems, or rollover protection structures. The absence of a windshield also means less protection from wind, debris, and weather.

4. **Limited Availability of Parts** While Arctic Cat parts are still available, some components (especially for older models) may be harder to find or more expensive than for newer ATVs. Aftermarket support is also less extensive.

5. **Riding Comfort** The rigid frame and lack of a windshield can make long rides less comfortable, especially in windy or dusty conditions. The seat and ergonomics may not be as refined as in modern ATVs.

6. **Resale Value** Classic ATVs hold value among collectors, but a heavily used or neglected NOS model may not retain as much value as a well-maintained newer ATV.

7. **Noise and Vibration** Two-stroke engines are louder and vibrate more than modern four-strokes, which can be fatiguing during extended rides.

8. **Legal Restrictions** Some regions have banned or restricted older ATVs due to emissions or safety concerns. Always check local regulations before purchasing.

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The Arctic Cat 4639-493 TwinSpar 7-11 NOS is an excellent choice for riders who prioritize **performance, simplicity, and off-road capability** over modern conveniences. It s ideal for enthusiasts who enjoy tinkering with mechanics, appreciate classic ATVs, or plan to use it primarily for trail riding rather than daily commuting. However, buyers should be prepared for **higher maintenance costs, potential rust or wear issues, and a lack of modern safety features**.

If you re looking for a **project ATV** to restore, a **trail-focused machine**, or a **budget-friendly off-road option**, this model is a strong contender. But if you need **reliability, fuel efficiency, or modern comforts**, a newer ATV would be a better investment.

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- **Buy if:** You re an experienced rider, enjoy mechanical work, and want a powerful, no-frills off-road ATV. Ensure the unit is thoroughly inspected for rust, engine condition, and structural integrity before purchasing.

- **Avoid if:** You prioritize low maintenance, modern safety features, or plan to use the ATV for frequent long rides in varied conditions.

- **Consider alternatives:** If you like the TwinSpar but want a newer model, look at Arctic Cat s **four-stroke options** (e.g., 700 or 800 series) for better fuel efficiency and emissions compliance. For a budget-friendly modern ATV, brands like **Honda, Kawasaki, or Polaris** offer reliable options with better safety features.

Always test-ride the ATV, check its service history, and budget for potential repairs before finalizing the purchase.

Details:

Brand new never mounted 2007 to 2011 Arctic Cat twinspar chassis Chrome green windshield still wrapped in, plastic in.

part #: 4639493 prices

• $60.00-$189.90

specifications snowmobileshields:

• for makes: Arctic-cat, Arctic
• brand: Arctic Cat
• mpn: 4639-493
• part type: Windshield

offer snowmobileshields:

• options: Ship-to-home
• quantity: 1
• best offers: True
• availability: In Stock
• sold: 0
• started: March 12, 2026

payments snowmobileshields:

• other
• credit card: Diners-club
• wallet: Apple-pay

general snowmobileshields:

• condition: New
• Parts Accessories > Snowmobile Parts > Windshields

shipping snowmobileshields:

• cost: $40.00
• transit: 2-6 Days
• service: UPS Ground
• type: Fixed
• carrier: UPS
• class: Standard

returns snowmobileshields:

• policy: No Returns

seller snowmobileshields:

• city: Osceola, Wisconsin
• rating: 100.0%
• # reviews: 607

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