Gaskets 11
Camshafts 3
Billet SideCovers 12
Billet Flywheels 17
Billet Connecting Rods 3
Billet Crankshaft 1
Air Filters / Fuel Control & Delivery / Related 33
Stock OEM Engine Parts 6
Pistons and Rings 4
Valve Train 2
Headers / Mufflers 5
ARC Rod Bolts/Bearings 2

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Predator 420cc

When it comes to upgrading your Predator 420 engine for racing performance, ARC Racing offers top-tier components engineered for speed, durability, and reliability. Whether you're looking to enhance power output, increase RPM limits, or ensure the longevity of your engine under high-performance conditions, ARC Racing has the parts you need.

Why Choose ARC Racing for Predator Parts?

ARC Racing is a trusted name in the high-performance racing industry, known for precision-engineered components that deliver outstanding results. Here’s why racers choose ARC Racing for their Predator upgrades:

  • Premium-Quality Materials – All parts are designed with high-grade aluminum and steel for maximum durability.
  • Proven Performance – Tested and used by top racers in the industry.
  • Expert Engineering – Designed to withstand the extreme demands of competitive racing.
  • Wide Selection – From billet rods to high-performance carburetors, ARC Racing provides everything needed for a complete engine overhaul.

Frequently Asked Questions

What’s the best upgrade for a Predator racing engine?

The best upgrade depends on your performance goals, but a billet connecting rod, high-performance camshaft, and racing carburetor are among the top choices for serious racers.

Do ARC Racing parts fit stock Predator engines?

Yes, many ARC Racing parts are designed as direct replacements for stock components, though some upgrades may require additional modifications.

Are modifications legal for all racing classes?

Racing regulations vary by class and organization. Always check with your racing association to ensure compliance with modification rules.

How do I increase the RPM limit safely?

Upgrading to a billet flywheel, stronger valve springs, and a high-performance camshaft can help safely increase RPM limits while ensuring engine reliability.

Shop Performance Parts at ARC Racing

Get the best Predator racing parts from ARC Racing today. Browse our selection of high-performance components and take your engine to the next level!

  • DJ-1152A Fuel Hose Clips

    DJ-1152A Fuel Hose Clips

    (7)

    These are the clips used with our DJ-1152 Fuel Filters. They are simple, easy to use and stay where you put them.
    $0.83
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  • DJ-1231 Carburetor Throttle Rod and Return Spring

    DJ-1231 Carburetor Throttle Rod and Return Spring

    (2)

    These items normally come with every engine as part of the original governor assembly.  They are both required when using any of ARC's engine top plates. ***Will Not Work with big block GX390 or 420 style top plates. Must use the OEM throttle rod...
    $3.50
    Add to Cart The item has been added
  • DJ-1231A Carburetor Return Spring

    DJ-1231A Carburetor Return Spring

    This is the Ducar OEM replacement Throttle Return Spring. This is the thicker spring used with many of todays top plates. These items normally come with every engine as part of the original governor assembly. It is required when using any of ARC's engine...
    $1.58
    Add to Cart The item has been added
  • DJ-1231B Throttle Linkage Rod

    DJ-1231B Throttle Linkage Rod

    The throttle linkage rod connects the throttle arm to the throttle shaft. ***Will Not Work with big block GX390 or 420 style top plates. Must use the OEM throttle rod for these plates***
    $1.90
    Add to Cart The item has been added
  • DJ-3108 GX270-GX390 Dyno 356 WLC Cam

    DJ-3108 GX270-GX390 Dyno 356 WLC Cam

    (1)

    The DynoCams 356 is a high lift modified grind that is very capable of extreme RPMs. This cam has very aggressive ramps and requires an upgraded spring package, billet rod, and billet flywheel. For use with Tillotson or larger carb.Engine: Honda...
    $152.65
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  • DJ-3112 GX270-GX390 Dyno 308 WLC Cam

    DJ-3112 GX270-GX390 Dyno 308 WLC Cam

    (1)

    This cam is easy on the valve train and has a very wide power band. This cam requires an upgraded spring package, billet rod, and billet flywheel.Engine: Honda GX270-GX390INTAKELIFT: .308Dur @ .050": 244.2 Deg. C/L: 108 ATDCEXHAUSTLIFT: .308DUR @ ...
    $152.65
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  • DJ-3114 GX270-GX390 Dyno 275 WLC Cam

    DJ-3114 GX270-GX390 Dyno 275 WLC Cam

    (1)

    This cam is to be used in mild modified applications. It will require an upgraded spring package, billet rod, and billet flywheel. Engine: Honda GX270-GX390INTAKELIFT: .276Dur @ .050": 239.5 Deg. C/L: 108 ATDCEXHAUSTLIFT: .276DUR @ .050": 238.8...
    $152.65
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  • DJ-3146 ARC Top Plate/Throttle Assy, GX270-GX390

    DJ-3146 ARC Top Plate/Throttle Assy, GX270-GX390

    (3)

    ARC introduces a new Top Plate/Throttle Control Assembly for the Honda GX340/GX390 Engines. This Part is made with quality components and the same attention to detail and quality workmanship that our customers have come to expect from ARC. Includes...
    $44.00
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GX200 Crankshaft Specs and Fitment

Understanding crankshaft specifications ensures proper compatibility with your engine:

  • Stock Stroke: Approximately 2.123 - 2.125 inches
  • PTO Size: Must match your clutch or torque converter
  • Rod Journal Size: Must match your connecting rod 1.180 MAX
  • Engine Compatibility: GX200 and most 196cc clone engines

Matching these specs is essential for correct installation and long-term reliability.

OEM vs Performance Crankshafts (Know the Difference)

OEM GX200 crankshafts are designed for stock engine performance and reliability.

Unlike performance crankshafts:

  • OEM crankshafts are not dynamically balanced for high RPM racing
  • They are not intended for extreme performance builds
  • They are designed for standard operating conditions and longevity

If you are building a high-performance or racing engine, a billet or performance crankshaft may be required. For standard rebuilds and everyday use, OEM crankshafts are the correct choice.

Compatible Engines and Applications

GX200 crankshafts are widely used in:

  • Honda GX200 engines
  • 196cc clone engines
  • Go-karts and minibikes
  • Utility and recreational small engines

They are ideal for restoring engines used in both work and recreational applications.

Why Choose GX200 Crankshafts

Crankshafts are manufactured for consistency and reliability:

  • Built to OEM specifications for proper fitment
  • Trusted for engine rebuilds and replacements
  • Designed for durability in standard operating conditions

Our components are relied on by engine builders and small engine enthusiasts who need dependable parts that fit correctly and perform as expected.

Find the Right GX200 Crankshaft for Your Engine

Choosing the correct GX200 crankshaft ensures your engine runs properly and reliably.

Whether you're completing a rebuild or replacing a damaged component, ARC Racing offers OEM-quality crankshafts designed for straightforward installation and long-term use.

GX200 Crankshaft FAQ

What does a GX200 crankshaft do?
It converts the up-and-down motion of the piston into rotational force to power the engine.

What is the stock GX200 crankshaft stroke?
Approximately 2.123 - 2.125 inches.

Are OEM crankshafts balanced?
OEM crankshafts are manufactured to factory balance standards but are not dynamically balanced like performance crankshafts.

Do I need a performance crankshaft?
For standard use and rebuilds, an OEM crankshaft is the best choice.

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