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EC 1.3 Billet Roller Rev Rockers with Bearings for Big Block GX390/Clone
EC 1.3 Billet Roller Rev Rockers with Needle Bearings for Big Block Clone
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EC 1.3 Billet Roller Rev Rockers with Bearings for Big Block GX390/Clone

Part Number: 1517RR
Online Price: $259.99
Phone Order Price:$289.99
You Save:$30.00(10%)
Questions about this item? Be the first to ask here.
Availability: Out of Stock.

Description

EC 1.3 Ratio Billet Aluminum Rev Rockers for Honda GX390, Predator 420, Wildcat 460 & Big Block Clones – With Needle Bearings & Roller Tips


The EC 1.3 Ratio Billet Aluminum Rev Rockers are engineered for serious power and durability, designed specifically for wedge-head (non-hemi) small engine platforms like the Honda GX390, Predator 420, Wildcat 460, and other big block clones.


Our latest generation of Rev Rockers is packed with high-performance upgrades including needle bearings, hardened roller tips, and a larger rocker body—giving you increased strength, smoother operation, and improved valve train geometry for high-RPM performance.


Key Features & Benefits:

Needle Bearing Design – Reduced Friction & Improved Durability

The new design features precision needle bearings at the pivot point to significantly reduce friction and wear compared to traditional bushing-style rockers. This helps prevent rocker seizure, especially during dry starts or improper assembly. Always use high-quality assembly lube such as Maxima Racing Oil Assembly Lube during installation.

Hardened Roller Tips – Increased Strength & Lash Cap Compatibility

Now equipped with oversized hardened roller tips to provide better clearance and optional lash cap use. Although stainless valves don't require lash caps, the roller tip enhances rocker-to-retainer clearance—especially valuable in high-lift camshaft setups and aggressive racing builds.


Stronger, Lightweight Body – Built for Stability at High RPMs

Crafted from aircraft-grade billet aluminum, these rocker arms are both stiff and lightweight, helping to reduce valve train harmonics and maintain stability at high RPMs. The added strength supports modern cam profiles with higher lift and faster acceleration.


Precision Rocker Geometry – Enhanced Valve Lift & Duration

With a 1.3:1 rocker ratio, these arms effectively increase valve lift and improve valve acceleration and duration—especially beyond .150" lift. Correct pushrod length and spring pressure must be matched to your cam and valve weight for peak performance.


Rev Rocker Technical Specs:

  • Material: CNC-machined billet aluminum
  • Needle Bearings: Yes, at shaft pivot
  • Roller Tip: Hardened, oversized for added clearance
  • Ratio: 1.3:1
  • Lash Adjusters: Titanium nuts included
  • Main Shaft: Shaft-mounted with snap rings & brass washers for security and smooth action
  • Compatibility: Non-hemi big block clones including GX390, 420cc Predator, 460 Wildcat, and similar blocks


Why Choose EC Rev Rockers?

These are the only 1.3 ratio aluminum rockers with needle bearings at this price point—delivering top-tier performance without breaking the bank. Whether you're building a mini bike, race kart, or competition engine, EC's Rev Rockers deliver exceptional value, strength, and reliability.


FAQ

What engines are these EC 1.3 Ratio Rev Rockers compatible with?

These rockers are specifically designed for non-hemi big block clones, including:

  • Honda GX390
  • Predator 420
  • Wildcat 460
  • Other similar 420cc–460cc clone engines

They are not compatible with hemi-style cylinder heads.


What is the benefit of a 1.3 rocker ratio?

A 1.3:1 rocker ratio increases valve lift and duration, improving airflow and combustion efficiency. This leads to stronger top-end power and better performance at higher RPMs, especially when matched with aggressive camshaft profiles.


Do these rockers have needle bearings?

Yes. These EC Rev Rockers feature precision needle bearings at the pivot point, reducing friction and increasing durability—especially helpful during high RPM operation or dry starts.


Are lash caps required?

No, lash caps are not required when using stainless valves, but the oversized hardened roller tips are lash-cap compatible for setups that demand them, such as high-lift cams or titanium valves.


What pushrod length should I use?

Pushrod length depends on your cam profile, valve type, and spring pressure. Since these rockers slightly change the geometry, you may need to measure for custom pushrods to maintain proper preload and geometry.


Can these rockers handle high RPM and racing use?

Absolutely. They are built from aircraft-grade billet aluminum for strength and lightweight performance. The larger body, roller tips, and needle bearings make them ideal for racing engines and high-RPM builds like mini bikes, race karts, and competition engines.


What assembly lube should I use during installation?

We recommend using Maxima Racing Oil Assembly Lube or another high-quality engine assembly lubricant to protect the needle bearings during initial startup.


Why choose EC Rev Rockers over other brands?

EC's rockers are the only 1.3 ratio billet aluminum rockers with needle bearings at this price point. You get premium features—like roller tips, shaft mounting, and titanium adjusters—without paying premium prices.

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