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Tillotson 212R-225RS Stock 5mm 27mm Intake Valve

Part Number: 138210101
Online Price: $7.99
27mm Intake Valve 5mm Stem – Predator 212 & Tillotson 212R
Availability: In Stock.

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Description

EC 27mm Intake Valve with 5mm Stem – For Tillotson 212R, 225RS & Predator 212 Non-Hemi

Boost airflow and RPM with this lightweight 27mm intake valve – precision-engineered for small engine performance and built to factory specs.


Description

Upgrade your engine's intake system with the EC 27mm Intake Valve, designed to deliver maximum performance and reliability in Tillotson 212R, Tillotson 225RS, and Predator 212 Non-Hemi cylinder heads. This high-flow valve features a 5mm stem for reduced valvetrain mass, improved airflow, and higher RPM potential—all while retaining compatibility with OEM automotive-style retainers and locks.


Compared to standard 25mm intake valves used in Honda GX200s and 196cc clone engines, this 27mm valve increases air volume into the combustion chamber, enhancing throttle response and top-end power. Its carbon steel construction ensures durability under heat and stress, making it ideal for racing, karting, and high-performance applications.


Key Features:

  • Engine Compatibility: Fits Tillotson 212R, 225RS, and Predator 212 Non-Hemi heads
  • Upgraded Size: 27mm head for increased intake flow over 25mm GX200-style valves
  • 5mm Valve Stem: Lightweight stem reduces reciprocating mass and supports higher RPMs
  • OEM Fitment: Direct-fit for factory 5mm retainers and valve locks
  • Durable Build: Made from high-strength carbon steel for extended life in high-heat environments


Valve Specifications:

  • Head Diameter: 1.062” / 27mm
  • Stem Diameter: 0.194” / 5mm
  • Overall Length: 2.519” / 64mm
  • Weight: ~20.8g
  • Material: Carbon Steel


Why Upgrade to a 27mm Intake Valve?

  • More Air = More Power: The 27mm head diameter improves volumetric efficiency over stock 25mm valves, making it ideal for performance builds.
  • Higher RPM Capability: The smaller 5mm stem reduces weight, which lessens spring load requirements and improves valvetrain stability.
  • Stock-Appearing Compatibility: Perfect for racers needing OEM-style components that meet class rules but demand better performance.
  • Bolt-In Fit: No machining or modification needed when used with compatible 5mm retainers and locks.


Ideal For:

  • Racing karts and minibikes
  • Performance Predator 212 and Tillotson builds
  • Stock-appearing class engines
  • High-RPM camshaft applications

FAQ

Q1: What engines is this 27mm intake valve compatible with?

A: This valve fits the Tillotson 212R, Tillotson 225RS, and Predator 212 Non-Hemi engines that use 5mm valve stems and automotive-style retainers.


Q2: How does this compare to a stock intake valve?

A: Stock GX200-style intake valves are typically 25mm. This 27mm valve increases airflow, improving power and efficiency, especially in modified engines.


Q3: Can I use this valve with factory retainers and locks?

A: Yes. It is designed for OEM 5mm automotive-style retainers and valve locks, making it a direct-fit upgrade with no modification required.


Q4: What are the performance advantages of a 5mm stem?

A: A 5mm stem is lighter than a 5.5mm stem, reducing valvetrain weight. This helps the engine rev higher with less stress on springs and rockers, ideal for high-RPM use.

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