Hey guys! Let's dive into the world of the 1987 Polaris Indy 400, a snowmobile that holds a special place in the hearts of many enthusiasts. We're going to explore its top speed, overall performance, and what made it such a popular machine back in the day. Whether you're a seasoned snowmobile veteran or just curious about vintage sleds, buckle up and get ready for a ride!

Unveiling the 1987 Polaris Indy 400

The 1987 Polaris Indy 400 wasn't just another snowmobile; it was a game-changer. Introduced during a time when snowmobiling was hitting its stride, the Indy 400 quickly became a favorite for its blend of performance, reliability, and affordability. Polaris, a brand synonymous with innovation in the snowmobile industry, packed this model with features that appealed to a wide range of riders. From weekend trail warriors to those looking for a bit more oomph, the Indy 400 delivered.

At its heart was a 398cc, fan-cooled, twin-cylinder engine. This engine was known for its smooth power delivery and ease of maintenance. Unlike some of its liquid-cooled counterparts, the fan-cooled design made it more robust and less prone to overheating, especially in varying snow conditions. This reliability was a major selling point, as it meant more time riding and less time wrenching in the garage.

The Indy 400 also featured a lightweight chassis, which contributed to its nimble handling. The independent front suspension (IFS) was a significant advancement, providing improved ride quality and control compared to the leaf-spring suspensions found on older models. This made the Indy 400 more comfortable and easier to handle, especially on rough trails.

The styling of the 1987 Indy 400 was also noteworthy. With its sleek lines and bold graphics, it looked fast even when it was standing still. The comfortable seat and well-placed controls added to the overall riding experience, making it a joy to spend hours on the trails.

The Quest for Top Speed

Alright, let's get to the burning question: What was the top speed of the 1987 Polaris Indy 400? While it's tough to give an exact number due to factors like snow conditions, rider weight, and overall maintenance, the Indy 400 typically clocked in at around 60-70 mph (96-113 km/h). Not bad for a 400cc fan-cooled sled, right?

Several factors influenced the top speed of the Indy 400. The engine's horsepower, the clutching system, and the track all played a role. The fan-cooled engine provided a decent amount of power for its size, but it wasn't designed to be a speed demon. Instead, it focused on delivering consistent and reliable performance.

The clutching system was crucial in transferring power from the engine to the track. A well-tuned clutch ensured that the engine was operating at its optimal RPM range, maximizing acceleration and top speed. Riders who wanted to squeeze a bit more performance out of their Indy 400 often experimented with different clutch setups.

The track also played a significant role. A track with aggressive lugs provided better traction, which improved acceleration and helped maintain speed in loose snow. However, a more aggressive track could also increase drag, potentially reducing top speed on hard-packed surfaces.

Keep in mind that the age and condition of the snowmobile also have a significant impact on its performance. A well-maintained Indy 400 with fresh belts, properly lubricated components, and a clean carburetor will undoubtedly perform better than one that has been neglected.

Performance Beyond Top Speed

While top speed is fun to talk about, the 1987 Polaris Indy 400 was more than just a straight-line machine. Its overall performance made it a versatile and enjoyable snowmobile for a variety of riding conditions. The Indy 400 excelled on trails, thanks to its nimble handling and comfortable ride. The IFS soaked up bumps and provided excellent control, allowing riders to confidently navigate twisty and uneven terrain.

The sled's lightweight design also contributed to its agility. It was easy to maneuver and didn't require a lot of effort to steer, which was especially appreciated on long rides. The Indy 400 was also surprisingly capable in deeper snow, thanks to its wide track and decent power.

Of course, the Indy 400 wasn't without its limitations. The fan-cooled engine wasn't as powerful as some of the liquid-cooled engines of the time, so it wasn't the best choice for hill climbing or racing. However, for the average rider who wanted a reliable and fun snowmobile for trail riding and general use, the Indy 400 was a great option.

The 1987 Polaris Indy 400 also earned a reputation for its durability. Polaris built these machines to last, and many of them are still running strong today. With proper maintenance and care, an Indy 400 can provide years of reliable service.

Maintaining Your 1987 Polaris Indy 400

If you're lucky enough to own a 1987 Polaris Indy 400, or if you're considering buying one, it's essential to understand the importance of proper maintenance. Keeping your Indy 400 in good condition will not only ensure that it performs its best but also prolong its lifespan.

Here are some key maintenance tips:

• Regularly inspect and replace belts: The drive belt is a critical component that transfers power from the engine to the track. A worn or damaged belt can significantly reduce performance and even cause damage to the engine. Check the belt regularly for cracks, fraying, and wear, and replace it as needed.
• Keep the carburetor clean: The carburetor is responsible for mixing air and fuel, and a dirty carburetor can cause poor performance, hard starting, and rough idling. Clean the carburetor regularly using a carburetor cleaner, and make sure all the jets and passages are clear.
• Lubricate all moving parts: Proper lubrication is essential for reducing friction and wear on moving parts. Use a high-quality grease to lubricate the suspension components, steering linkages, and other grease fittings. Also, be sure to lubricate the chaincase with the recommended oil.
• Check and adjust the track: The track should be properly tensioned and aligned to ensure optimal performance and prevent premature wear. Check the track tension regularly and adjust it as needed. Also, inspect the track for damage, such as tears or missing lugs.
• Store your snowmobile properly: When storing your Indy 400 for the off-season, take steps to protect it from the elements. Drain the fuel tank, fog the engine, and cover the snowmobile to prevent rust and corrosion. Store it in a cool, dry place.

By following these maintenance tips, you can keep your 1987 Polaris Indy 400 running strong for years to come. Regular maintenance will not only improve its performance but also increase its reliability and resale value.

The Enduring Appeal of the Indy 400

So, why does the 1987 Polaris Indy 400 continue to be a beloved snowmobile? It's more than just nostalgia. The Indy 400 represents a time when snowmobiles were simple, reliable, and affordable. It wasn't the fastest or the most powerful machine on the market, but it was a solid performer that provided a lot of fun for a wide range of riders.

The Indy 400 also played a significant role in popularizing snowmobiling. Its affordability and ease of use made it accessible to more people, helping to grow the sport. Many riders have fond memories of their first snowmobile being an Indy 400, and they appreciate its simplicity and reliability.

Today, the 1987 Polaris Indy 400 is a popular choice for vintage snowmobile enthusiasts. It's relatively easy to find parts and information, and there's a strong community of owners who are passionate about keeping these machines running. Whether you're looking for a fun project, a reliable trail sled, or just a piece of snowmobile history, the Indy 400 is an excellent choice.

In conclusion, the 1987 Polaris Indy 400 was a significant snowmobile that offered a great blend of performance, reliability, and affordability. Its top speed of around 60-70 mph was respectable for its class, but its overall performance and durability were what truly made it stand out. If you're looking for a vintage snowmobile that's easy to maintain, fun to ride, and full of character, the Indy 400 is definitely worth considering. Happy riding, and remember to always respect the snow!