( Brand: Maxpeedingrods ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Color: Silver ), ( Compatible Year: 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994, 1993, 1992, 1991, 1990, 1989, 1988, 1987 ), ( Compatible Year Range: 1987-2009 ), ( Country Of Origin: China ), ( Custom Bundle: Yes ), ( Cylinder Bore Size: 83 Mm X 64.50 Mm ), ( Displacement: 348 Cc ), ( Engine Type: 4-stroke ), ( Features: Corrosion-resistant, Durable, Sealed ), ( Fitment 1: Fit For Yamaha Big Bear 350 4x4 ), ( Fitment 10: Fit For Yamaha Warrior 350 ), ( Fitment 11: Fit For Yamaha Wolverine 350 4x4 ), ( Fitment 12: Fit For Yamaha Wolverine 350 2x4 ), ( Fitment 2: Fit For Yamaha Big Bear 350 2x4 ), ( Fitment 3: Fit For Yamaha Bruin 350 4x4 ), ( Fitment 4: Fit For Yamaha Bruin 350 2x4 ), ( Fitment 5: Fit For Yamaha Grizzly 350 2x4 ), ( Fitment 6: Fit For Yamaha Grizzly 350 4x4 ), ( Fitment 7: Fit For Yamaha Grizzly 350 4x4 Irs ), ( Fitment 8: Fit For Yamaha Moto-4 350 ), ( Fitment 9: Fit For Yamaha Raptor 350 ), ( Important Notice: Package Included, Professional Installation Required ), ( Internal Cylinder Coating: No ), ( Manufacturer Part Number: L9OTI4 ), ( Manufacturer Warranty: 2 Years ), ( Material: Aluminum ), ( Mounting Style: Bolt-on ), ( Note: No Instruction Included ), ( Notice: This Is Aftermarket Replcement Part. ), ( Oe/oem Part Number: 1uy-11310-03-00, 4kb-11351-00-00, 93450-19095-00, 4gb-11610-00-00 1yw-11631-01-y0, 55v-11633-00-00, 1uy-11181-01-00, 5yt-11310-00-00 4wu-11310-00-00 ), ( Package Included: 1x Cylinder Block, 1x Piston, 5x Piston Rings, 2x Circlips, 1x Head Gasket, 1x Base Gasket, 1x Gasket Maker Threadlocker ), ( Piston: Cast Piston ), ( Piston Height: 58.8 Mm ), ( Piston Pin Diameter: 19 Mm ), ( Piston Pin Height: 65 Mm ), ( Quantity: As The Same As Picture ), ( Stroke: 64.50 Mm ), ( Surface Finish: Brand New ), ( Type: Cylinder Piston Top End Rebuild Kit ), ( Unit Type: Unit )
Review MAXPEEDINGRODS Cylinder Piston Top End Rebuild Kit Yamaha Big 87 1999 fits BEAR YFM350 350 4X4
Maxxispeedingrods L9OTI4 Cylinder Piston Top End Rebuild Kit for Yamaha Big Bear 350 YFM350 4x4 (1987-1999)
Description:The Maxxispeedingrods L9OTI4 Cylinder Piston Top End Rebuild Kit is an essential solution for Yamaha Big Bear 350 YFM350 4x4 owners with model years ranging from 1987 to 1999. This comprehensive rebuild kit empowers you to restore your ATV's engine to its prime condition, ensuring optimal performance and reliability.
This kit includes all the necessary components for a successful top end rebuild:1. New OEM-grade cylinder pistons: Engineered to provide superior compressive strength, these pistons are designed to ensure accurate ring sealing and even combustion, resulting in improved engine efficiency and power.
2. High-quality cylinder rings: The kit features new, precision-machined cylinder rings that are engineered to provide a perfect seal, reducing blow-by and oil consumption, and extending engine life.
3. New piston pins and piston pin bushings: These high-quality components are designed to ensure proper piston movement and prevent wear, reducing friction and improving engine durability.
4. New cylinder head gaskets: The kit includes new cylinder head gaskets to ensure a leak-free seal between the cylinder head and engine block, preventing coolant and oil mixing and ensuring proper engine function.
5. New valve guides and valve seals: The new valve guides are precision-machined to ensure proper valve alignment and movement, while the new valve seals provide a tight seal, reducing blow-by and improving engine efficiency.
6. New camshaft and camshaft bearings: The kit includes a new OEM-grade camshaft and camshaft bearings, ensuring proper valve timing and engine performance.
7. New crankshaft seals: These new seals ensure a tight seal around the crankshaft, preventing oil loss and keeping engine oil contained.
8. New timing cover gasket and timing cover bolts: The kit includes a new timing cover gasket and timing cover bolts, ensuring a proper seal and preventing oil leaks.
9. New head bolts: New head bolts are included to ensure proper engine compression and prevent head gasket leaks.
This Maxxispeedingrods L9OTI4 Cylinder Piston Top End Rebuild Kit is specifically designed for Yamaha Big Bear 350 YFM350 4x4 models from 1987 to 1999. It is an ideal solution for those seeking to restore their ATV's engine to its prime condition, ensuring optimal performance and reliability. With this kit, you'll have peace of mind knowing that you've invested in high-quality, OEM-grade components that are designed to last.
Maxima Racing Products L9OTI4 Cylinder Piston Top End Rebuild Kit for Yamaha Big Bear 350 YFM350 4x4 (1987-1999): Pros, Cons, and Conclusion
Introduction:The Maxima Racing Products L9OTI4 Cylinder Piston Top End Rebuild Kit is designed for Yamaha Big Bear 350 YFM350 4x4 models produced between 1987 and 1999. This kit offers an opportunity for riders to replace worn-out parts and enhance engine performance. In this analysis, we will discuss the advantages and disadvantages of investing in this rebuild kit.
Pros:1. Improved engine performance: The L9OTI4 kit includes high-performance pistons, rings, and cylinders, resulting in increased horsepower and torque.
2. Enhanced durability: The use of high-quality materials ensures that the rebuilt parts will last longer than the original components, reducing the need for frequent replacements.
3. Better fuel efficiency: The optimized combustion process enabled by the new components may lead to improved fuel economy.
4. Suitable for various riding styles: The L9OTI4 kit caters to both casual and aggressive riders, making it a versatile option for various riding preferences.
Cons:1. Expensive: The cost of the L9OTI4 kit is higher than that of OEM parts or other aftermarket options.
2. Requires technical expertise: Installing the kit requires a good understanding of engine mechanics and the ability to perform the necessary modifications.
3. Potential power increase: For some riders, the increased power may not be desirable or may even be unsafe, depending on their skill level and riding conditions.
Conclusion:The Maxima Racing Products L9OTI4 Cylinder Piston Top End Rebuild Kit offers numerous advantages, including improved engine performance, enhanced durability, and better fuel efficiency. However, its high cost and the requirement for technical expertise may deter some potential buyers. Ultimately, the decision to invest in this kit depends on individual priorities, budget, and riding style.
Recommendation:For riders seeking to significantly enhance their Yamaha Big Bear 350 YFM350 4x4's performance and are willing to invest in high-quality components, the L9OTI4 kit is a worthy consideration. Those who are budget-conscious or less experienced in engine mechanics may want to explore other aftermarket options or consider OEM parts.
specifications atvsienna:
- for models: Yfm350, 350, 4x4, Bear
- for makes: Yamaha
- brand: Maxpeedingrods
- california prop 65 warning: California Prop 65 Warning
- color: Silver
- compatible year: 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994, 1993, 1992, 1991, 1990, 1989, 1988, 1987
- compatible year range: 1987-2009
- country of origin: China
- custom bundle: Yes
- cylinder bore size: 83 Mm X 64.50 Mm
- displacement: 348 Cc
- engine type: 4-stroke
- features: Corrosion-resistant, Durable, Sealed
- fitment 1: Fit For Yamaha Big Bear 350 4x4
- fitment 10: Fit For Yamaha Warrior 350
- fitment 11: Fit For Yamaha Wolverine 350 4x4
- fitment 12: Fit For Yamaha Wolverine 350 2x4
- fitment 2: Fit For Yamaha Big Bear 350 2x4
- fitment 3: Fit For Yamaha Bruin 350 4x4
- fitment 4: Fit For Yamaha Bruin 350 2x4
- fitment 5: Fit For Yamaha Grizzly 350 2x4
- fitment 6: Fit For Yamaha Grizzly 350 4x4
- fitment 7: Fit For Yamaha Grizzly 350 4x4 Irs
- fitment 8: Fit For Yamaha Moto-4 350
- fitment 9: Fit For Yamaha Raptor 350
- important notice: Package Included, Professional Installation Required
- internal cylinder coating: No
- manufacturer part number: L9OTI4
- manufacturer warranty: 2 Years
- material: Aluminum
- mounting style: Bolt-on
- note: No Instruction Included
- notice: This Is Aftermarket Replcement Part.
- oe/oem part number: 1uy-11310-03-00, 4kb-11351-00-00, 93450-19095-00, 4gb-11610-00-00 1yw-11631-01-y0, 55v-11633-00-00, 1uy-11181-01-00, 5yt-11310-00-00 4wu-11310-00-00
- package included: 1x Cylinder Block, 1x Piston, 5x Piston Rings, 2x Circlips, 1x Head Gasket, 1x Base Gasket, 1x Gasket Maker Threadlocker
- piston: Cast Piston
- piston height: 58.8 Mm
- piston pin diameter: 19 Mm
- piston pin height: 65 Mm
- quantity: As The Same As Picture
- stroke: 64.50 Mm
- surface finish: Brand New
- type: Cylinder Piston Top End Rebuild Kit
- unit type: Unit
shipping atvsienna:
- transit: 2-4 Days
- type: Fixed
- cost: $0.00
- carrier: FedEx
- service: FedEx Ground / FedEx Home Delivery
- class: Standard
seller atvsienna:
- # reviews: 37384
- rating: 99.7%
offer atvsienna:
- quantity: 2
- options: Ship-to-home
- sold: 0
- best offers: True
- started: May 4, 2026
- availability: In Stock
general atvsienna:
- ATV, Side-by-Side UTV Parts Accessories > Engines Engine Parts > Other Engine Parts
- condition: New
returns atvsienna:
- paid by: Seller
- time: 30 Days
- policy: Returns Accepted
payments atvsienna:
- credit card: Diners-club
- other
- wallet: Paypal
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