Go

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!

  • 6774 Honda GX340/390 4.51" Billet Rod

    6774 Honda GX340/390 4.51" Billet Rod

    (2)

    ARC billet +.100" long connecting rod for the Honda GX390-460cc clone engine. 4.510" center to center for a 1.416" crank pin and a .788" wrist bore. Manufactured from domestic 7075-T651 aluminum and uses 5/16" rod bolts designed and produced by ARP. Also...
    $149.95
    Add to Cart The item has been added
  • 6877 Pulse Inlet Fitting

    6877 Pulse Inlet Fitting

    (1)

    Pulse Inlet Fitting These fittings go in the clone valve cover in order to pulse the fuel pump. We sell the valve cover with the fitting already installed as well.
    $2.00
    Add to Cart The item has been added
  • 6888BK 3.5x4 Pre-Filter

    6888BK 3.5x4 Pre-Filter

    (7)

    A simple, inexpensive pre-filter that protects your engine without sacrificing horsepower. Clean with a mild detergent and water. Let air dry in the Sun  ***Do Not oil***
    $8.99
    Add to Cart The item has been added
  • 6889RD 3.5x5 Foam Pre-Filter

    6889RD 3.5x5 Foam Pre-Filter

    (1)

    Easy to clean washable foam Pre-Filter helps your filter do it's job in overly dusty conditions.  Wash with a mild detergent and water. Let air dry in the Sun.  
    $2.25
    Add to Cart The item has been added
  • 6898 Straight Air Filter

    6898 Straight Air Filter

    (1)

    Straight Air Filter. 3-1/2" x 4" x 2-7/16" flange diameter.  Wash with K&N filter cleaner or a mild detergent like Simple Green and water. Sling water out by hand and let air dry in the Sun ***Do Not blow out with compressed...
    $12.00
    Add to Cart The item has been added
  • 6899 Angled Air Filter

    6899 Angled Air Filter

    (5)

    The standard angled air filter used in most 4 cycle karting engines. 3-1/2" x 4" with a 20 degree angle. The inside diameter of the mounting flange is 2-7/16". Most OHV kart engines will require an angled air filter Wash with K&N filter cleaner or a...
    $10.99
    Add to Cart The item has been added
  • 6905 Red Fuel Line

    6905 Red Fuel Line

    (12)

    RED Fuel Line by the foot.Durable and PliableTo order, use Quantity to show how many feet of hose needed.  $0.65/foot
    $0.70
    Add to Cart The item has been added
  • 6909 Blue Fuel Line

    6909 Blue Fuel Line

    (11)

    BLUE Fuel Line by the footDurable and PliableTo order, use quantity to show how many feet of hose needed.  $0.65/foot
    $0.70
    Add to Cart The item has been added
  • 6929 ARC GX340/390 Air Filter Adapter

    6929 ARC GX340/390 Air Filter Adapter

    (6)

    ARC air filter adapter designed for the GX340/390 stock carburetor used on the stock GX340/390 head. This adapter comes with the air box to carb gasket part number DJ-3314, and 2 M6 x 1 Hex nuts. It does not come with a choke bracket, part number...
    $17.00
    Add to Cart The item has been added
  • 6935 Fuel Pump, Mikuni

    6935 Fuel Pump, Mikuni

    (4)

    Mikuni DF44 Pulse Style Fuel PumpThis fuel pump operates from a vacuum pulse from either the engine's crankcase or intake manifold. Methanol or Gas.
    $27.25
    Add to Cart The item has been added
Compare (0)
!