fits make: Polaris. year: 1977–1990.

( Brand: Spi ), ( Manufacturer Part Number: SM-03146 ), ( Part Type: Bearing Chain Case )
The SPI SM-03146 chain bearing kit is specifically designed for Polaris snowmobiles manufactured between 1977 and 1990. This kit includes all the necessary components to replace the worn-out or failing chain bearings on your Polaris sled.
The kit comprises four high-quality, precision-machined chain bearings, two inner chain idlers, and two outer chain idlers. These bearings are engineered to provide superior strength, durability, and efficiency compared to OEM parts. They are made of premium materials, ensuring a longer service life and improved performance.
Each bearing is designed to effortlessly accommodate the roller chain, reducing the stress and wear on other components. The kit's idlers, both inner and outer, ensure proper chain alignment and tension, contributing to quiet, efficient, and smooth operation.
Additionally, these bearings and idlers are designed to be a direct fit for Polaris snowmobiles from the mentioned model years. Installation is straightforward and can be done using common shop tools, following the procedures outlined in the provided instructions or the factory service manual.
By replacing worn-out or failing chain bearings and idlers with the SPI SM-03146 kit, you'll improve your snowmobile's overall performance, extend its lifespan, and enhance your riding experience. Replacing chain components regularly is essential for maintaining the optimal condition and enjoyment of your Polaris snowmobile.
Furthermore, the SM-03146 kit is backed by SPI's reputation for producing top-tier aftermarket parts. You can take confidence in knowing that this product has undergone rigorous testing and quality control processes to ensure that it exceeds the expectations of the most discerning riders. With these components in place, your Polaris snowmobile will run stronger and perform better than ever before.
Buying a SPI SM-03146 chain bearing kit for a Polaris snowmobile manufactured between 1977 and 1990 can be a worthwhile investment if you're experiencing issues with your machine's chain and bearing system. Below are some pros and cons that can help you make an informed decision.
Pros:1. Improved Performance: Worn-out chain bearings will adversely affect the performance of your snowmobile. Replacing them with new ones may help improve its overall performance, causing smoother operation and better fuel efficiency.
2. Reduced Noise: Worn chain bearings can cause excess noise during operation. New bearings will reduce the amount of noise produced by your snowmobile, making for a quieter riding experience.
3. Longer Lifespan: By replacing your chain bearings regularly, you will safeguard your investment by reducing the chances of more severe damage and prolonging the life of your snowmobile.
Cons:1. Cost: New chain bearing kits can be costly, especially when compared to the price of replacing just one or two bearings. In some cases, it might be more economical to replace your entire track or chain if the bearings are failing in large numbers.
2. Labour Costs: Installing a chain bearing kit yourself can be a complicated process, so you might need to pay for professional labor if you don't have the skills or tools to do it at home.
3. Time Consuming: Installing a new chain bearing kit can be a lengthy process, taking several hours or even a day, depending on your mechanical skills and the number of bearings you need to change.
Conclusion:Replacing worn-out chain bearings in your Polaris snowmobile coming from the 1977 to 1990 era can significantly improve its performance and longevity. However, the associated costs, including the price of the kit, labor, and the time it takes to install, should be considered before making a purchase. If you're comfortable with mechanics and have the necessary tools, you might save money by doing it yourself. If not, consider doing a cost-benefit analysis weighing the potential benefits against the costs to determine if the investment is worth it. Overall, maintaining the proper care and timely replacement of worn-out bearings is crucial for your snowmobile's optimal functioning and longevity.
Recommendation:If you decide to purchase an SPI SM-03146 chain bearing kit for your Polaris snowmobile, ensure that you have all the necessary tools and are confident in your mechanical abilities to perform the installation correctly. If you're unsure, consider consulting a professional technician to execute the task. Remember to shop around for the best price and double-check with the dealer to ensure the correct nuts and bolts are included in the kit to make the installation as smooth as possible.
1985 - 1989 400. Compatible with Polaris model's below: 1977 - 1982 TXL 340. Made in Taiwan. 2 kits required per snowmobile.
1989 - 1990 500. Manufactured by SPI.