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Exhaust Valve Spring Retainer for Honda GX200/Clone 196cc Engines
138190027 Tillotson Clone Exhaust Valve Spring Retainer
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Exhaust Valve Spring Retainer for Honda GX200/Clone 196cc Engines

Part Number: 138190027
Online Price: $2.99
OEM Exhaust Valve Spring Retainer – GX200 & Clone 196cc
Availability: In Stock.

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Description

Exhaust Valve Spring Retainer for Honda GX200, Predator 212 & Clone Engines


This OEM-style slip-on exhaust valve spring retainer is designed specifically for 5.5mm stem clone valves and is commonly used in stock-class 196cc engines such as the Honda GX200 and its clones. Unlike retainers that use split locks, this version securely fits over the valve stem without additional hardware—but must only be used with the correct valve type.


Key Features:

  • Slip-On Design: No split locks required; designed for 5.5mm valve stems only
  • Stock-Class Legal: OEM replacement part for clone engines used in box stock racing
  • Compatible with Lash Caps: Exhaust retainer has the necessary depth to seat a lash cap securely
  • Lightweight Option Available: Machinable top surface allows trimming down to rule-compliant weight (5g minimum per AKRA/4g NKA)
  • Not for High-Spring-Pressure Builds: For modified engines running more than 26 lb springs, upgrade to billet retainers and stainless valves with split locks

Warning: Do not use this retainer with aftermarket valves, non-5.5mm stems, or valves requiring split lock systems.


Application & Compatibility:

OEM Exhaust Valve Retainer for:

  • Honda GX200 / Clone (196cc)
  • Tillotson 196R / 196RS
  • Ducar 196
  • Box Stock Project 196cc
  • Speed Kart 196
  • Most 196cc non-Hemi clone engines in AKRA/NKA stock classes


Specifications:

  • Retainer Type: Slip-on (no split locks)
  • Stem Size Compatibility: 5.5mm only
  • Average Weight: ~6.8g
  • Material: Steel
  • Modifications: Can be machined (top only) to meet racing rule weights


Racing Rule Compliance:

AKRA 2020 Rules on Valve Spring Retainers

The retainer may be machined on the top surface only to meet weight specs. Intake 4 grams, Exhaust 5 grams


NKA 2020 Rules on Valve Spring Retainers

40.4.20.4.6: Valve Spring Retainers Minimum Weight: 4.0 grams 



Tech Tip:

When using this exhaust retainer, always install a lash cap to ensure proper seating and retention. Without the cap, the valve may slip out under load.

FAQ

1. What valve stems does this retainer fit?

It fits only 5.5mm valve stems commonly found in OEM GX200 and clone-style engines. It is not compatible with aftermarket valves that require split locks.


2. Does this retainer require a lash cap?

Yes. The exhaust retainer must be used with a lash cap to properly seat and retain the valve. Without it, the valve may slip out.


3. Can this be used in modified or high-RPM engines?

Only if you’re using stock 18–26 lb valve springs. For anything above that, upgrade to a billet retainer and stainless valves with split locks.


4. Is this part legal in AKRA or NKA box stock classes?

Yes. It meets the 2020 AKRA and NKA rules, including weight specs. You may machine the top surface of the retainer to reach rule minimums (5g exhaust / 4g intake).


5. What’s the difference between the intake and exhaust retainer?

The exhaust retainer is deeper to accommodate the required lash cap, while the intake version is shallower and retains the valve differently.

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