-28%
Click to zoom in
  • Guaranteed Fitment

    Always the correct part

ALL BALLS Crankshaft Bearing and Seal Kit for Polaris Trail Boss and Big Boss 250 (Part #24-1077)

2 sold in last 8 hours
ALL BALLS
22-41077
In stock
$107.75 $76.99
Upgrade your Polaris ATV with the ALL BALLS Crankshaft Bearing and Seal Kit, designed specifically for...
$76.99

customers are viewing this product
ALL BALLS Crankshaft Bearing and Seal Kit for Polaris Trail Boss and Big Boss 250 (Part #24-1077)

Upgrade your Polaris ATV with the ALL BALLS Crankshaft Bearing and Seal Kit, designed specifically for models including the 1988-1992 Polaris Trail Boss 250 and Big Boss 250 6X6. This comprehensive kit ensures optimal engine performance by replacing worn or damaged bearings and seals, restoring smooth operation and extending engine life. Crafted with precision Japanese bearings from Koyo and Nachi, the kit guarantees durability and reliable performance under demanding conditions. The high-quality crankshaft seals feature a carbon/fluorocarbon lip material for excellent resistance to wear and heat, coupled with stainless steel garter springs for enhanced sealing integrity. This combination significantly reduces startup friction, improving dry start performance and minimizing crank pin wear, which are critical factors in maintaining engine health over time. Proper installation of these components helps to prevent oil leaks and contamination, ensuring your ATV runs smoothly and efficiently across challenging terrains. Whether you're restoring an older model or performing routine maintenance, the ALL BALLS kit provides the necessary components to keep your Polaris ATV operating at peak performance. Designed for an easy fit, this kit is an essential upgrade for ATV enthusiasts seeking quality, reliability, and longevity from their engine components.

Features:

  • Koyo and Nachi precision Japanese crank bearings for durability and reliable performance
  • Crankshaft seals with a carbon/fluorocarbon pad on the seal lip for enhanced wear resistance
  • Stainless steel garter springs improve sealing integrity and longevity
  • Reduces startup friction, enhancing dry start performance
  • Helps minimize crank pin wear for extended engine life

Fitment
Polaris Big Boss 250 4X6 1989
Polaris Big Boss 250 4X6 1990
Polaris Big Boss 250 4X6 1991
Polaris Big Boss 250 4X6 1992
Polaris Big Boss 250 6X6 1991
Polaris Big Boss 250 6X6 1992
Polaris Cyclone 250X 1987
Polaris Scrambler 250 1985
Polaris Scrambler 250 1986
Polaris Trail Blazer 250 1990
Polaris Trail Blazer 250 1991
Polaris Trail Blazer 250 1992
Polaris Trail Boss 250 2X4 1985
Polaris Trail Boss 250 2X4 1986
Polaris Trail Boss 250 2X4 1987
Polaris Trail Boss 250 2X4 1988
Polaris Trail Boss 250 2X4 1989
Polaris Trail Boss 250 2X4 1990
Polaris Trail Boss 250 2X4 1991
Polaris Trail Boss 250 2X4 1992
Polaris Trail Boss 250 4X4 1987
Polaris Trail Boss 250 4X4 1988
Polaris Trail Boss 250 4X4 1989
Polaris Trail Boss 250 4X4 1990
Polaris Trail Boss 250 4X4 1991
Polaris Trail Boss 250 4X4 1992
Polaris Trail Boss 250R/Es 1988

Read More
Read Less
REFUND POLICY We have a 14-day return policy, which means you have 14 days after receiving your item to request a return. Returns accepted for 14 days Customer provides return shipping 20% restocking fee No returns on final sale items To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. To start a return, you can contact us at support@mo-moto.com. Please note that returns will need to be sent to the following address: Mo-Moto/Returns 6082 W Seltice Way STE 121 Post Falls, ID 83854 If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted. You can always contact us for any return question at support@mo-moto.com. Damages and issues Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right. Exceptions / non-returnable items Certain types of items cannot be returned, like perishable goods (such as food, flowers, or plants), custom products (such as special orders or personalized items), and personal care goods (such as beauty products). We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item. Unfortunately, we cannot accept returns on sale items or gift cards. Exchanges The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item. European Union 14 day cooling off period Notwithstanding the above, if the merchandise is being shipped into the European Union, you have the right to cancel or return your order within 14 days, for any reason and without a justification. As above, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. Refunds We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method within 10 business days. Please remember it can take some time for your bank or credit card company to process and post the refund too. If more than 15 business days have passed since we’ve approved your return, please contact us at support@mo-moto.com.

Your cart

×