Upgrade your Polaris ATV with the ALL BALLS Crankshaft Bearing and Seal Kit, part number 24-1088, designed to deliver reliable performance and enhanced longevity. This kit is compatible with a range of Polaris models including the 1990-1993 Trail Boss 350L 2X4 and 4X4 variants, the 1993 Big Boss 350L 6X6, and the 1991-1993 Sportsman 350 4x4. Built with precision components, this kit ensures your engine runs smoothly under demanding conditions. The bearings are crafted by Koyo and Nachi, renowned Japanese manufacturers known for their high-quality, durable bearings that minimize friction and wear. The crankshaft seals feature a carbon/fluorocarbon pad on the seal lip, providing excellent sealing performance, and stainless steel garter springs for added durability. These features work together to reduce startup friction, improving dry start performance and lowering crank pin wear, ultimately extending engine life. Proper installation of this kit can result in smoother engine operation, improved acceleration, and reduced maintenance costs. Whether you're restoring an older ATV or performing routine maintenance, the ALL BALLS kit offers a trusted solution to keep your Polaris running at peak performance. Its compact design and high-quality materials make it an essential component for any serious ATV enthusiast or professional mechanic working on Polaris Trail Boss or Sportsman models, ensuring a seamless fit and reliable operation every time.
Features:
- Koyo and Nachi precision Japanese crank bearings for reliable performance
- Crankshaft seals with a carbon/fluorocarbon pad on the seal lip for effective sealing
- Stainless steel garter springs enhance durability and seal integrity
- Reduces startup friction to improve dry start performance
- Helps lower crank pin wear for extended engine lifespan
Fitment
Polaris Big Boss 350L 6X6 1993
Polaris Sportsman 350 4x4 1993
Polaris Trail Boss 350L 2X4 1990
Polaris Trail Boss 350L 2X4 1991
Polaris Trail Boss 350L 2X4 1992
Polaris Trail Boss 350L 2X4 1993
Polaris Trail Boss 350L 4X4 1990
Polaris Trail Boss 350L 4X4 1991
Polaris Trail Boss 350L 4X4 1992
Polaris Trail Boss 350L 4X4 1993
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.