Prima 161cc Big Bore Cylinder Kit 58.5mm Genuine Buddy 125

Prima 161cc Big Bore Cylinder Kit – 58.5mm – Genuine Buddy 125 Only

Make your Genuine Buddy 125 scream with this 58.5mm big bore 161cc performance cylinder kit, made for Prima by NCY. Pair it with a performance exhaust and gain 2.6 horsepower — a 36% increase in power. Add an NCY big valve head and push it to nearly 45% more horsepower over stock. Stack a 26mm carb on top and you’re in a different league entirely.

This kit is also included in our Stage 2 Buddy 125 Performance Kit. We also recommend installing our Decompression Tube Assembly with any cylinder upgrade to release excess crankcase pressure.

Key Benefits

• Displacement Increase: Bumps engine displacement from 125cc to 161cc for a meaningful power jump.
• More Torque & Horsepower: Significant gains in both low-end pull and top-end power.
• Greater Top Speed & Acceleration: Noticeably faster in real-world riding conditions.
• Best Dollar-for-Dollar HP Gain: This bolt-on kit delivers the biggest performance return per dollar spent.

Specifications

• Piston: Cast aluminum, 58.5mm
• Piston Rings: 5 rings, 58.5mm
• Wrist Pin & Clips: 13mm
• Cylinder: Cast iron, 58.5mm
• Outer Sleeve Diameter: 60.4mm
• Cylinder Height (without sleeve): 68.8mm
• Overall Height (with sleeve): 90mm
• Includes: Gasket set

Compatibility

Genuine Buddy 125 ONLY. This kit is not compatible with any other model or engine platform. Verify your vehicle before ordering.

Off-Road Use Notice

This product is intended for off-road use only. It is not intended for use on public roads or land. This product is not legal for use in California on pollution-controlled vehicles. Check local laws before installing.

Performance upgrades are considered racing parts and are not covered by warranty.

California Prop 65 Warning: www.P65Warnings.ca.gov