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Rocker Arm Stud for Honda GX390, Predator 420 & Wildcat 460
188F-13202-A GX390/420 Clone Rocker Arm Fastening Bolt
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Rocker Arm Stud for Honda GX390, Predator 420 & Wildcat 460

Part Number: 188F-13202-A
On sale: $1.50 $1.12
Phone Order Price:$1.20
You Save:$0.08(7%)
Rocker Arm Fastening Stud – GX390 / Predator 420 / Wildcat 460 (Wedge Head)
Availability: In Stock.

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Description

Rocker Arm Fastening Stud – Honda GX390 / Predator 420 / Wildcat 460 (Non-Hemi Wedge Heads)


This hardened steel Rocker Arm Stud is designed to mount stock or aftermarket rocker arms onto Wedge (Non-Hemi)style cylinder heads used in Honda GX390 and Big Block Clone engines like the Predator 420 and Wildcat 460.


It features dual-threaded ends:

  • M8 x 1.25 thread for securing into the cylinder head
  • M6 x 0.75 thread for the rocker arm adjusting nut

Perfect for performance builds, rebuilds, or general maintenance where precise valve lash and rocker stability are required.


Product Features:

  • Thread Size: M8 x 1.25 (head side), M6 x 0.75 (adjuster side)
  • Material: Hardened steel for strength and durability
  • Fitment: Wedge / Non-Hemi heads only (stud-mounted rockers)
  • Torque Spec: 19 ft-lbs into the cylinder head with 12mm socket
  • Applications: Honda GX390, Predator 420, Wildcat 460, and most Big Block Clone engines
  • Use Case: Mounts rocker arms on stud-style valve trains for precise valve control


Compatibility Note:

  • Not compatible with Hemi-style heads, which use shaft-mounted rockers
  • Only for Wedge (Non-Hemi) heads with stud-mounted rocker arms


Common Uses:

  • Racing lawnmowers
  • Pulling tractors
  • High-performance engine builds
  • Stock engine rebuilds

FAQ

Q1: What engines does this rocker arm stud fit?

A: It fits most Wedge (Non-Hemi) cylinder heads on engines such as the Honda GX390, Predator 420, and Wildcat 460. It is not compatible with Hemi-style heads, which use shaft-mounted rockers.


Q2: What are the thread sizes on each end of the stud?

A:

  • Cylinder Head Side: M8 x 1.25
  • Adjuster Side (Rocker Arm): M6 x 0.75


Q3: What is the torque spec for installing the stud?

A: The recommended torque into the cylinder head is 19 ft-lbs.


Q4: Is this suitable for racing or high-performance applications?

A: Yes. These hardened steel studs are often used in racing lawnmowers, pulling tractors, and other high-performance GX390 builds to ensure consistent and stable rocker arm operation.


Q5: How do I know if my head is Wedge or Hemi style?

A:

  • Wedge (Non-Hemi) heads use stud-mounted rocker arms like this product supports.
  • Hemi heads use shaft-mounted rocker arms and require a different mounting system.

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