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Tillotson PK-1B Stock Carburetor for GX200/Clone/Predator
PK-1B Tillotson GX200/Clone/Predator Stock Carburetor
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Tillotson PK-1B Stock Carburetor for GX200/Clone/Predator

Part Number: PK-1B
Online Price: $29.95
PK-1B Tillotson GX200 / Clone / Predator Stock Carburetor – Racing Performance & Precision
Availability: In Stock.

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Description

PK-1B Tillotson GX200 / Clone / Predator Stock Carburetor – Precision Racing Performance


The Tillotson PK-1B carburetor is engineered by Tillotson LTD, the world leader in small engine racing carburetors, specifically to meet the demanding needs of USA clone racing engines like the GX200 and Predator. Developed by EC Carburetors for the kart racing market, the PK-1B is an upgraded evolution of the popular PK-1A, designed to deliver top-tier performance while complying with racing rule committees.


Why Choose the PK-1B Carburetor?
This carburetor offers superior airflow and reliability, rivaling or exceeding the performance of premium Ruixing and Huayi carburetors. It’s the closest out-of-the-box solution that matches the power and consistency of custom blueprint carburetors — making it ideal for racers who want stock-appearing but race-ready equipment.


Key Features & Specifications:

  • Precision-machined venturi at .613" ± .001", nearly meeting the .615" no-go rule — no additional boring needed
  • Centered throttle shaft alignment for optimal airflow and throttle response
  • 24-hole progressive emulsion tube for smooth fuel delivery
  • Main jet size: .039" (stock starting point)
  • Low side jet size: .028" (ideal for most racing applications)


Recommended Jetting:

  • Stock rule clone engines: Designed for engines using a CL-1 camshaft, 10.8 valve springs, turning max RPM of ~6,100.
  • Built setups: For ported heads, CL-3 cams, 10.8 springs, and 32-degree flywheel advance running 7,000+ RPM, try main jets between .034"–.039” and low side jets between .032"–.035". (Note: This may cause rough idle or fuel loading if idled too long.)
  • Minibike racers: Start with stock jetting; if idle is rough, try a low side jet between .020"–.024".


Important Notes:

  • Designed for racing applications — no warranty or returns.
  • Engineered for consistency, reliability, and compliance with racing regulations.

FAQ

Q1: Which engines are compatible with the PK-1B Tillotson carburetor?
A: The PK-1B fits Honda GX200, clone engines (196cc), Predator 212, and similar small engines used in kart racing and minibikes.


Q2: What improvements does the PK-1B have over the previous PK-1A model?
A: The PK-1B features improved casting to comply with racing rule committees and enhanced airflow to match or exceed the best Ruixing and Huayi carburetors. It also has a precision-machined venturi and optimized throttle shaft alignment.


Q3: Do I need to modify the carburetor venturi size?
A: No. The venturi is machined to .613" ± .001", very close to the .615" no-go rule, so no additional boring is necessary.


Q4: What jet sizes come standard with the PK-1B carburetor?
A: It includes a .039" main jet and a .028" low side jet, suitable for stock rule clone engines using a CL-1 camshaft and 10.8 valve springs.


Q5: Can I use this carburetor on modified engines?
A: Yes. For modified setups with ported heads and higher RPMs, you may adjust jets to a main jet size of .034"–.039” and low side jet size of .032"–.035". Be cautious as this may cause rough idle or fuel loading if idled for long periods.


Q6: Is this carburetor suitable for minibike racing?
A: Yes. For minibike racers, the carburetor is ready to use as is, though a smaller low side jet (.020"–.024") may be needed if the idle is rough.


Q7: Does this product come with a warranty?
A: No. The PK-1B is considered a racing product and is sold without warranty or returns.

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