Wossner 8094D150 Piston Kit - Polaris Trail Blazer Trail Boss Scrambler 250 +1.50mm Oversize

Wossner 8094D150 Standard Series Forged 2-Stroke Piston Kit - +1.50mm Oversize

Give your Polaris ATV cylinder one more lease on life with the Wossner 8094D150 Piston Kit. Specifically engineered for the classic Polaris 250cc 2-stroke engines found in the Trail Blazer, Trail Boss, and Scrambler models, this +1.50mm oversize forged kit is the ultimate solution for heavily worn or damaged cylinders that require significant boring. At Moto-House MX, we specialize in keeping legendary machines on the trail; choosing a Wossner forged piston ensures your engine has the structural strength to handle the increased displacement and heat associated with a large oversize bore.

The 8094D150 features a durable dual-ring configuration, designed for the high-torque, utility-focused demands of Polaris ATVs. This setup provides excellent heat transfer to the cylinder walls and maintains a reliable compression seal even under heavy loads. To ensure quiet operation and a smooth-running engine, Wossner applies a permanent molybdenum disulphide skirt coating that reduces friction and prevents piston rock. Precision-machined for a 73.50mm finished bore, this 73.43mm piston kit is the professional's choice for a comprehensive Polaris 250 engine overhaul.

Top Features: Wossner 8094D150 Piston Kit

• +1.50mm Oversize (73.43mm): Specialized oversize for cylinders requiring a 73.50mm finished bore to remove deep scoring or structural irregularities.
• Dual Ring Configuration: Optimizes engine cooling and provides a long-lasting compression seal, ideal for recreational and utility ATV use.
• Aerospace-Grade Forging: Delivers superior strength and resistance to thermal fatigue compared to standard cast pistons.
• Low-Friction Skirt Coating: Permanent skirt treatment minimizes internal drag, protects the cylinder wall, and facilitates a safer break-in period.
• Precision Engineering: Machined for lightness to improve throttle response while maintaining maximum crown and skirt wall thickness.
• Complete Kit: Includes the high-performance forged +1.50mm piston, rings, wrist pin, and circlips.

Expert Pro-Tip: A +1.50mm oversize is a significant jump. It is imperative that your cylinder is precision-bored and honed by a professional machine shop to exactly 73.50mm to ensure the correct piston-to-wall clearance. For a professional-grade rebuild, always install with a fresh top-end gasket kit and utilize premium 2-stroke oil to ensure your new forged assembly is properly lubricated from the first heat cycle.

Fitment List

Year Range	Vehicle Brand	Vehicle Model
1990-2005	Polaris	Trail Blazer 250 / ES / Freedom
1985-1999	Polaris	Trail Boss 250 / 2x4 / 4x4 / ES / R
1985-1986	Polaris	Scrambler 250 / 250R ES

Frequently Asked Questions

Q: Is it safe to bore my Polaris 250 cylinder to +1.50mm?
A: Yes, as long as the cylinder sleeve has enough remaining thickness. This oversize is a standard way to save an expensive cylinder that would otherwise need to be replaced due to deep damage.

Q: What are the benefits of a forged piston in an older ATV?
A: Forged pistons are much denser and stronger than cast pistons. They can withstand higher temperatures and mechanical stress, which is particularly beneficial in older, air-cooled engines that may run hotter than modern liquid-cooled units.

Q: Does this kit include the wrist pin bearing?
A: This kit includes the piston, rings, pin, and clips. The small-end needle bearing is not included. We highly recommend purchasing a new bearing and a top-end gasket set to complete your engine rebuild properly.

Recommended Pairings

• Complete Top End Gasket Set: Essential for a perfect seal and maintaining correct engine compression.
• High-Performance 2-Stroke Lubricant: Provides the necessary protection for your new forged piston during high-intensity riding.

Restore your machine’s power and precision today. Buy now at Moto-House MX!

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. The Best Motocross/UTV & ATV Shop in Central Florida. Stop by our local store in Montverde, FL or enjoy lightning-fast shipping across the USA.