Honda Navi 125cc Big bore kit

*Expected to be available for purchase Summer 2025 – currently in development with updated revisions.*

Finally — a true bolt-on big bore kit for the Honda Navi! No need to bore out your stock cylinder or modify your cases.

With a 53mm piston, this kit increases your Honda Navi’s displacement to 125cc, delivering noticeable gains in horsepower, torque, and top speed. Perfect for riders looking to unlock more performance from their Navi while keeping the install process simple.

Kit Includes:

• 53mm cast iron cylinder
• 53mm piston
• Piston rings
• Piston pin
• Piston clips
• Complete gasket set (cylinder head, base, and timing chain tensioner)

Recommended Upgrades:

For best results, pair this big bore kit with a performance camshaft and upgraded carburetor kit to maximize airflow and power output.