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Tillotson 196-212-225 Non-Hemi Square Tip Rocker Arms (2 Pack)
Clone Non-Hemi Square Tip Rocker Arms
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Tillotson 196-212-225 Non-Hemi Square Tip Rocker Arms (2 Pack)

Part Number: 138190033
Online Price: $5.99
Square Tip Rocker Arms 2-Pack – GX200 & Clone Non-Hemi
Availability: In Stock.

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Description

138190033 Square Tip Rocker Arms – 2-Pack for Non-Hemi 196cc Clone Engines

Stable, OEM-style rocker arms for consistent valve control and race rule compliance in Honda GX200 clones and Predator 212 non-hemi engines.


The 138190033 Square Tip Rocker Arms come as a matched 2-pack designed for 196cc Honda GX200-style clone engines with non-Hemi cylinder heads. Square-tip rocker arms are favored over round-tip versions due to their increased stability, particularly at higher RPMs and during extended engine use.


These rocker arms are often slightly off from a true 1:1 ratio—sometimes measuring 1:1.05 or 1:1.1—impacting valve lift and legality in racing classes with strict cam and rocker specifications. Most sanctioning bodies allow light grinding to achieve an exact 1:1 ratio or fine-tune valve lift to complement your camshaft specs and meet maximum allowable lift.

Whether you're rebuilding a stock clone or prepping a kart motor for tech inspection, these rocker arms deliver dependable performance and adjustability.


Key Features:

  • Part #: 138190033
  • Tip Style: Square (more stable than round-tip designs)
  • Quantity: Set of 2 rocker arms
  • Valve Lift Ratio: May vary slightly from 1:1; check if lift accuracy is required
  • Material: OEM-grade cast steel
  • Adjustment Compatibility: Can be lightly ground to correct ratio for tech-legal builds


Engine Compatibility:

These rocker arms fit non-Hemi cylinder heads found in:

  • Honda GX200
  • 196cc Clone Engines
  • Predator 212 / 224 Non-Hemi
  • Tillotson 196R / 212R / 225RS
  • Wildcat 240
  • Ducar 196 / 224 Non-Hemi


AKRA 2020 Rules for Rocker Arms

Factory stock rocker arms 1:1 ratio and pushrods only. The minimum overall length of the rocker arm 2.145". Minimum thickness of the upper valve stem end of the rocker arm .030" The surface finish of the rocker arm's contact area to valve only, non-tech, adjusts for proper running lift. Square tip rockers allowed. 


NKA 2020 Rules for Rocker Arms

40.4.20.3: Rocker Arms:

40.4.20.3.1: 1:1 ratio rocker arms only. 

40.4.20.3.2: Rocker arms must be steel and are subject to magnetic tests. 

40.4.20.3.3: Rocker arms are allowed to be ground on valve stem location only or on the rocker arm's bottom to allow the running lift to be compliant. Grinding on the sides of the rocker arm is prohibited no minimum thickness checks. 


FAQ

Q1: What’s the difference between square tip and round tip rocker arms?

A: Square tip rocker arms offer better stability and alignment, especially at higher RPMs. They’re more commonly used in performance and racing applications than the round tip style.


Q2: Are these true 1:1 ratio rocker arms?

A: Not always. Some units may measure slightly above 1:1 (e.g., 1:1.05 or 1:1.1). If your rules require a strict 1:1 lift ratio, you may need to lightly grind the rocker to achieve compliance.


Q3: Do these rocker arms fit Hemi-style heads?

A: No, these rocker arms are designed for non-Hemi heads only. They will not fit Hemi engines due to different geometry and mounting specs.


Q4: Can I use these with performance camshafts?

A: These rocker arms work well with up to our 26lbs valve springs and may work with slightly stiffer springs, but it’s recommended to use stiffer rocker arms for better performance.  


Q5: Do these come with hardware or pushrod guides?

A: No, this is a 2-pack of rocker arms only. Adjuster nuts, lock nuts, and guides are sold separately.

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