51mm Cylinder Piston Ring Kit For Husqvarna Power Cutter Saw K770 K760 Active II

51mm Cylinder Piston Ring Kit for Husqvarna

Replacement cylinder and piston ring assembly with a 51mm bore diameter compatible with OEM cross-reference numbers for Husqvarna power cutter saws.

Overview

This 51mm Cylinder Piston Ring Kit restores compression and power to the engine of compatible Husqvarna cut-off saws. The kit supplies a matched cylinder bore and piston assembly sized specifically for two-stroke power cutter applications where consistent ring seal is critical for reliable starting and full cutting RPM. Mechanics and equipment technicians use this cylinder piston ring kit to rebuild top ends on high-hour saws that have lost compression from normal ring and bore wear.

Built For Performance

• Oversize-matched 51mm bore and piston set restores factory compression and peak power output
• Hard-chrome plated cylinder wall resists scuffing and extends ring life under sustained high-RPM operation
• Pre-gapped piston rings reduce end-gap setup time and promote immediate ring seal during break-in
• Lightweight cast piston with drilled oil return holes prevents ring sticking at elevated cutting temperatures
• Circlip grooves machined with tight tolerances keep wrist pin retention secure through continuous vibration
• Kit includes cylinder, piston, ring set, wrist pin, and circlips as a complete top-end rebuild package

Fits These Machines

• for Husqvarna K770
• for Husqvarna K760
• for Husqvarna K760 Active II

On-The-Job Use

• Top-end engine rebuild on power cutters used in concrete cutting and road work
• Restoring compression on rescue and fire department saws that must start reliably under load
• Overhauling high-hour masonry and demolition saws that have lost power and become hard to start
• Field rebuilds where replacing the complete cylinder assembly is faster than honing and re-ringing alone
• Pipe and utility cutting applications that run saws at wide-open throttle for extended periods

Specs At A Glance

Good To Know

Q: What break-in procedure is recommended after installing this cylinder piston ring kit? A: Run the saw with a rich fuel mixture for the first two to three tanks, avoiding prolonged wide-open throttle to allow the rings to seat evenly against the cylinder wall.

Q: Can this 51mm kit be used if the original bore is worn beyond the standard size? A: The kit provides a standard 51mm bore and piston assembly intended to replace a cylinder that is still within specification for this diameter, so measure the existing bore before ordering.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.