78.50 mm Standard Bore Cylinder Piston Gasket Kit for 2000-2006 Honda Rancher 350

Key Features

• Complete Overhaul Solution: A 100% brand-new, standard-sized replacement cylinder kit featuring the cylinder, piston assembly, and necessary top-end gaskets to restore your engine to peak operational health.

• Premium Metal Alloy Build: Manufactured from high-grade alloy metals offering extreme heat and wear resistance, maintaining stable compression under heavy off-road workloads.

• Superior Sealing Performance: Premium head and base gaskets ensure tight, leak-free operation, completely preventing coolant, oil, or fuel from escaping the combustion chamber.

• Precision Engineering: Features an exquisite broad-brimmed manufacturing process for smooth, rounded edges, ensuring seamless cooperation with other internal engine components.

Technical Specifications

• Cylinder Bore: 78.50 mm

• Cylinder Stroke: 68.00 mm

• Engine Displacement: 329 cc

• Compression Ratio: 8.8:1

Reference Part Numbers

• Replaces OE Numbers: 12100-HN5-670, 13010-HN5-671, 13101-HN5-670, 13111-HC0-000, 13112-HN5-670, 12251-HN5-671, 98069-57916, 2191-HN5-670

Fitment Guide

Specifically designed as a direct-fit replacement for the following Honda Rancher 350 ATV models:

Package Includes

• 1 x Engine Cylinder Block

• 1 x Complete Piston Assembly (Piston, Piston Rings, Wrist Pin, and Retaining Circlips)

• 1 x Cylinder Head Gasket

• 1 x Cylinder Base Gasket (Note: Components are exactly as shown in the product pictures).

Important Buyer Notes

• Fitment Verification: Please strictly verify your vehicle's model year, exact sub-model designation (FA/FM/TE/TM), and original factory part numbers before purchasing.

• Professional Installation: Due to the internal timing and critical torque specifications required when rebuilding an engine top-end, installation instructions are not included, and professional installation by a certified powersports mechanic is highly recommended.

• Measurement & Color Tolerances: Please allow a minor 1–3mm variation due to manual factory measurements. Actual product appearance and finish may vary slightly from online visuals depending on your monitor's display settings.

It is the customer's responsibility to buy the right products. If you are not sure, please contact us in time.

Thank you for your cooperation.