Upgrade your 2003 Kawasaki KX125 with this Boyesen RAD Valve/Reed Kit, combining a RAD-11J RAD Valve Reed Cage Assembly and a Pro Series Reed Set (#PSR-192).

Experience smoother throttle response, maximum horsepower, and torque gains thanks to Boyesen’s cutting-edge dual-stage reed technology.

The all-in-one design bolts on easily—no modifications required—and is made from top-quality materials.

If you’re looking to optimize performance and achieve sharper acceleration, this is the perfect upgrade for your KX125.

Item Specifics:

1. Reed Set (#PSR-192 / 1008-0014)

   • Brand: Boyesen
   • Product Name: Replacement Pro Series Reed Set
   • Replaces OEM: 12022-1071
   • Features:
     • Utilizes the latest carbon fiber technology
     • Dual-stage design for quick, accurate response
     • Smooth throttle response with maximum horsepower and torque
     • Carbon fiber top reed, fiberglass/epoxy bottom reed

2. RAD Valve Cage (#RAD-11J)

   • Brand: Boyesen
   • Product Name: RAD Valve Reed Cage Assembly
   • Replaces OEM: 12021-0005
   • Features:
     • One-piece aluminum casting for even intake port distribution
     • Bolts in easily—no modifications required
     • Patented dual-stage reeds held by a specially-designed cage
     • Provides torque and throttle response gains throughout the RPM range

Fitment Table:

(Please verify compatibility with your exact year/model before purchase.)

Note: This kit is specifically designed for a 2003 Kawasaki KX125. 

Give your 2003 Kawasaki KX125 a performance edge with Boyesen’s RAD Valve/Reed Kit—ride stronger, ride faster!