SKI-DOO 420854085 Valve Bar

( Brand: Ski-doo ), ( Manufacturer Part Number: 420854085 ), ( Part Type: Valve Bar ), ( Country Of Origin: United States )

Review SKI DOO Valve Bar Used Oem fits MXZ 600 2009

The **Ski-Doo 2009 MXZ 600 Valve Bar** (Model #420854085) is a rare and highly sought-after snowmobile that embodies the perfect blend of classic performance and timeless design from Ski-Doo s golden era. Built with the MXZ 600 engine a legendary twin-cylinder powerplant known for its smooth, reliable operation and robust torque this model delivers a thrilling yet refined riding experience that appeals to both seasoned enthusiasts and those seeking a well-preserved piece of snowmobile history. The **600cc valve bar** configuration, a hallmark of Ski-Doo s mid-2000s lineup, ensures precise valve timing and optimal airflow, contributing to the engine s signature growl and responsiveness, whether cruising through fresh powder or carving tight turns on groomed trails. The **2009 model year** brings subtle refinements to the original MXZ design, including improved ergonomics, a more refined suspension setup, and enhanced durability, making it a standout choice for riders who appreciate both heritage and modern engineering.

Visually, the **2009 Ski-Doo MXZ 600 Valve Bar** exudes a sleek, aggressive aesthetic with its **black and silver color scheme**, accented by bold, angular bodywork that defines Ski-Doo s signature style. The **full-floating front suspension** and **adjustable rear suspension** ensure a balanced ride, absorbing bumps with ease while maintaining sharp handling. The **ergonomic seat and grips** are designed for comfort during long rides, while the **digital dash** provides essential metrics like speed, RPM, and fuel level, blending functionality with a touch of modern convenience. Under the hood, the **air-cooled, fuel-injected MXZ 600** engine paired with a **6-speed transmission** offers a perfect balance of power and efficiency, capable of effortlessly tackling everything from backcountry adventures to high-speed trail runs. The **valve bar design** not only enhances performance but also contributes to the engine s distinctive sound, a signature trait that sets this Ski-Doo apart from competitors.

For collectors and riders alike, the **2009 Ski-Doo MXZ 600 Valve Bar** represents a well-crafted, high-performance snowmobile that bridges the gap between classic and contemporary. Its **low-mileage examples** (if available) are particularly prized, offering a pristine riding experience with minimal wear. Whether used for recreational riding, trail racing, or as a showpiece, this model combines **reliability, power, and timeless appeal**, making it a standout addition to any snowmobile collection. With proper maintenance, it remains a dependable machine capable of delivering decades of exhilarating rides, embodying the spirit of Ski-Doo s legacy in every turn of the throttle.

### **Pros and Cons of Buying a 2009 Ski-Doo MXZ 600 Valve Bar (Model 420854085)**

#### **Pros**

1. **Powerful Engine** The 600cc MXZ engine is one of Ski-Doo s most reliable and high-performance two-stroke engines, delivering strong acceleration and top-end speed. It s well-suited for aggressive riding and off-road conditions.

2. **Proven Reliability** The 600cc MXZ engine has a long track record of durability, especially when properly maintained. Many owners report thousands of miles with minimal major issues if the machine is cared for.

3. **Lightweight and Maneuverable** The Ski-Doo MXZ 600 is one of the lighter models in its class, making it easier to handle in tight trails and steep climbs compared to heavier snowmobiles.

4. **Good for Racing and Performance Use** If you re looking for a machine for racing, track days, or aggressive riding, the MXZ 600 is a strong choice due to its power-to-weight ratio and responsive throttle.

5. **Aftermarket Support** Being a popular model, there is a wide range of aftermarket parts, upgrades (exhausts, carburetor kits, suspension upgrades), and tuning options available to enhance performance.

6. **Classic Ski-Doo Design** The 2009 model retains the classic Ski-Doo aesthetic with its sleek, aggressive styling, which appeals to enthusiasts who prefer a more traditional look over modern, streamlined designs.

7. **Lower Cost of Ownership (Compared to New Models)** Purchasing a used 2009 model means significant savings upfront, and with proper maintenance, it can remain a cost-effective option long-term.

8. **Strong Community and Parts Availability** The Ski-Doo MXZ 600 has a dedicated following, meaning you ll find forums, repair guides, and parts dealers familiar with this specific model.

---

#### **Cons**

1. **Age and Wear** At 15 years old (as of 2024), the machine will likely have significant wear on critical components such as the engine, transmission, suspension, and drivetrain. Major repairs (e.g., rebuilds, clutch replacements) may be inevitable.

2. **Fuel and Emissions Concerns** Two-stroke engines like the MXZ 600 are less fuel-efficient and produce more emissions than modern four-stroke or direct-injection models. Some areas may have restrictions on older two-stroke snowmobiles.

3. **Maintenance Requirements** Two-stroke engines require regular oil mixing with fuel, more frequent tune-ups, and attention to wear on components like the piston, crankshaft, and clutch. Neglect can lead to catastrophic failure.

4. **Resale Value** Older Ski-Doos, especially those with high mileage, depreciate quickly. If you plan to sell later, you may not recoup much of your initial investment.

5. **Modern Safety and Technology Gaps** Newer models feature advanced electronics (e.g., traction control, electronic throttle control, GPS) that improve safety and performance. The 2009 model lacks these, making it less versatile for varied conditions.

6. **Parts Availability May Be Limited** While parts are still available, some original manufacturer (OEM) components may be harder to find compared to newer models. Aftermarket parts are an option but may not always match OEM quality.

7. **Potential for Hidden Issues** Without a thorough inspection or service history, you risk inheriting problems like a worn-out clutch, leaking seals, or a failing transmission. Always get a pre-purchase inspection.

8. **Noise and Vibration** Two-stroke engines are louder and vibrate more than modern four-stroke or electric alternatives, which can be fatiguing during long rides.

---

### **Conclusion**

The 2009 Ski-Doo MXZ 600 Valve Bar is a **strong choice for enthusiasts who prioritize raw power, classic design, and performance over modern conveniences**. It s ideal for racers, track riders, or those who enjoy the thrill of a high-revving two-stroke engine. However, it requires **significant maintenance attention**, and its age means it may not be the most practical or cost-effective option for casual riders or those seeking long-term reliability without major investments.

If you re mechanically inclined, willing to invest time in upkeep, and don t mind the limitations of an older model, this snowmobile can be a **great project or performance machine**. For most everyday riders, a newer four-stroke or a well-maintained used model from the last decade might offer better balance between performance and practicality.

---

### **Recommendation**

- **Buy if:** You re an experienced rider, have mechanical skills, and want a high-performance, track-ready snowmobile. Budget for repairs and be prepared for maintenance.

- **Avoid if:** You re looking for a low-maintenance, modern machine with advanced safety features or plan to use it primarily for casual riding.

- **Consider alternatives:** If you want a more reliable used option, look at a **2010 2015 Ski-Doo MXZ 600 or 800 with a four-stroke engine** (e.g., MXZ-E) for better fuel efficiency and longevity. Alternatively, a **well-documented, low-mileage 2009 model with a full service history** would be a safer bet.

Always **inspect the machine thoroughly** (or have a mechanic do so) before purchasing, focusing on the engine, clutch, transmission, and suspension. Test-ride it to ensure it handles well and doesn t exhibit unusual noises or vibrations.

Details:

Al's Snowmobile and ATV parts. Good used OEM exhaust valve bar. Fits the following machines:: 2009 Ski Doo MXZ 600 TNT.O. Ski-Doo 209 Ski Doo MXZ 600 Valve Bar 420854085 Used OEM.

E-TEC REV-XP 120 MJ9A Early Build. Member since: Sep 08, 2001.

part #: 420854085 price

• $16.95

specifications exhaustsnowmobilee:

• for models: Mxz, 600
• for makes: Skidoo, Ski-doo
• for years: 2009
• brand: Ski-doo
• mpn: 420854085
• part type: Valve Bar
• country of origin: United States

general exhaustsnowmobilee:

• condition: Used
• Parts Accessories > Snowmobile Parts > Exhaust

offer exhaustsnowmobilee:

• sold: 0
• quantity: 1
• started: April 11, 2026
• options: Ship-to-home
• availability: In Stock

returns exhaustsnowmobilee:

• paid by: Buyer
• time: 30 Days
• policy: Returns Accepted

seller exhaustsnowmobilee:

• rating: 99.7%
• # reviews: 25848
• city: Newport, Vermont

payments exhaustsnowmobilee:

• credit card: Mastercard
• wallet: Paypal
• other

shipping exhaustsnowmobilee:

• cost: $0.00
• type: Calculated
• class: Standard, One-day, Expedited
• service: USPS Ground Advantage, UPS Next Day Air Saver, FedEx 2Day
• carrier: USPS, UPS, FedEx
• transit: 4-9 Days

Ski-doo 420854085 Is Similar To:

• 02-147 Kimpex Ski Doo Moto (24.1% similar) Complex replacement part for bro fits many 250 elan TNT, 340 Everest some future spirit model's. Complex ski doo moot exhaust grommet...(September 22nd, 2017)
• 02-222pl-c Bikeman Performance Bmp Ski-doo Powder (22.6% similar) This exhaust can sounds awesome...(December 31st, 2016)
• 02-228-sb Bmp Performance Y-pipe Ski-doo (20.6% similar) All manifolds fit simply replace the stock one for horsepower gains. No jetting for efi controllers required, we just recommend using premium pump fuel. Available for many of the popular arctic cat and ski model's with gains up to 12 horsepower. Id: Sb mfg price: 199. 95 size: great bolt on ...(April 27th, 2017)
• 02-228pl-b Bikeman Performance Bmp Ski-doo (20.2% similar) Simple, are you a die hard arctic cat enthusiast. If your answer is yes, so we and can prove it. If you want a light muffler that barks, powder lite is the way to go. 2-LBS and they fit great with laser cut mounting brackets. Arctic cat ATV dealer of the year. See pictures for examples of the damage...(November 13th, 2017)
• 02-228pl-c 241-01468pc Bmp Ski Doo Powder Lite (31.1% similar) This application is the bump full velocity stainless steel muffler. See on previous page...(March 7th, 2017)
• 03-209-c Bikeman Performance Used Ski (29.8% similar) Free shipping within the us. Will come with the mounting bolts. Retails for 229. Used item in good condition...(April 7th, 2017)
• 03-211-c Bikeman Performance Bmp Ski-doo (18.6% similar) Please e-mail or call for a rma. Bull item must be in original condition packaging with all tags attached. Arctic cat ATV dealer of the year. Simple, are you a die hard arctic cat enthusiast. If your answer is yes, so we and can prove it...(July 2nd, 2017)
• 03-212 Bikeman Performance Bmp Ski-doo (18.9% similar) Arctic cat ATV dealer of the year. Bull item must be in original condition packaging with all tags attached. Simple, are you a die hard arctic cat enthusiast. If your answer is yes, so we and can prove it. Bike man performance exhaust manifold - black brand new, in factory packaging bolt on this ...(July 10th, 2017)
• 03-212-c Bikeman Performance Bmp Ski-doo (18.6% similar) Bull item must be in original condition packaging with all tags attached. Bike man performance ceramic y-pipe exhaust manifold - Ski-doo ho SDI e-etc brand new, in the factory packaging bolt on this high flow for instant power gains this rev is one of best manifolds MARKET2-3 peak horsepower not ...(November 24th, 2017)
• 054460 Ski-doo Ski Doo Exhaust Pipe (41.3% similar) Virtually new exhaust pipe. Came out of etc...(December 26th, 2016)
• 08-2301 4630-0067 Kimpex Ski Doo (20.2% similar) Items are for sale locally and we update our listings constantly to prevent unavailability. Free shipping is for us lower 48 states only...(April 4th, 2017)