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Guaranteed Fitment
Always the correct part
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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