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420cc Carburetor for Honda GX340 GX390 Mini Bikes Go Karts

420cc Carburetor for Honda GX340 GX390 Mini Bikes Go Karts

Best price now

$65.00at Usa Autoparts DirectChecked Nov 9

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Price facts

  • Last seen at $65.00 at Usa Autoparts Direct on Nov 9.

Our take on the 420cc Carburetor for Honda GX340 GX390 Mini Bikes Go Karts

This is a replacement carburetor for Honda GX340 and GX390 single-cylinder engines, the 420cc-class motors common on mini bikes, go-karts and generators. It is a direct-fit part meant to restore fuel delivery when an original carburetor is clogged, worn or damaged. It is a basic mechanical carburetor with no electronic controls, so it suits owners doing their own repair work. Compared with OEM Honda parts, aftermarket units like this are cheaper and widely available, but owners often report needing to adjust the idle and mixture screws and to check jetting before the engine runs cleanly.

Best forGo-kart and mini bike owners replacing a failed carburetorOwners of Honda GX340 or GX390 engines doing their own repairsBudget repairs where an OEM Honda carburetor is not needed
Pros
  • Fits GX340 and GX390 engines directly
  • Simple mechanical design with no electronics
  • Installs with standard hand tools
  • Restores fuel delivery on a worn or clogged carburetor
  • Low-cost alternative to an OEM Honda part
Cons
  • Aftermarket quality varies between units
  • May need idle and mixture adjustment after fitting
  • Jetting may not match every engine or altitude
  • Fitment should be confirmed against the engine code before buying

420cc Carburetor for Honda GX340 GX390 Mini Bikes Go Karts prices at every store

  • Usa Autoparts DirectNew

    In stockShips from New Zealand · duties may applyReturn policy

    $65.00Checked Nov 9
    Visit Usa Autoparts Direct

What reviewers say

Owners of small engines generally treat these aftermarket GX340/GX390 carburetors as a workable budget fix. Many report the engine starts and runs well after installation, while others say the unit needed tuning or arrived with rough casting and poor gaskets.

What people mention
  • FitmentMixedSome owners say it bolts straight onto GX340 and GX390 engines, while others find the linkage or mounting needs work.
  • TuningMixedMany report the engine runs only after adjusting the idle and mixture screws.
  • Build qualityCriticisedCasting and small parts are described as rougher than OEM Honda pieces.
  • ValuePraisedOwners see it as a cheap way to get a dead engine running again.
  • Starting and runningPraisedWhen set up right, owners say the engine starts easily and holds a steady idle.

About the 420cc Carburetor for Honda GX340 GX390 Mini Bikes Go Karts

This is a replacement carburetor for Honda GX340 and GX390 engines. These engines are commonly found in mini bikes and go-karts. It is designed for 420cc applications.

The carburetor is built to meet OEM specifications and works as a direct replacement. It is made to deliver fuel to the engine and to support performance and fuel efficiency. Installation uses standard tools.

Fits models
Honda GX340, Honda GX390
Engine size
420cc
Applications
Mini bikes, go-karts
Type
Direct replacement carburetor
Installation
Standard tools
In the box
Carburetor
Fitment
Check fitment before purchase

Questions and answers

Will this fit my Honda GX390 engine?
It is listed for GX340 and GX390 engines. Check your engine code and the carburetor mounting pattern before ordering, since variations exist across model years.
Does it fit a 420cc engine?
It is intended for 420cc-class applications built on the GX340/GX390 platform. Confirm the engine is a Honda clone of that family, not a different design.
Will I need to adjust it after installing?
Expect to set the idle speed and mixture screws. Aftermarket carburetors rarely run perfectly out of the box, and altitude or engine condition can require jetting changes.
What is included?
The carburetor itself. Gaskets, fuel lines and mounting hardware are not listed, so check what you need before installing.
Is it as good as an OEM Honda carburetor?
It costs far less but quality is less consistent. For a working engine, an OEM part is the safer choice; for a budget repair, this unit is a reasonable option.
Can I install it myself?
Yes. It is a mechanical carburetor that mounts with standard tools. Drain the fuel, disconnect the linkage and fuel line, and recheck the throttle and choke travel after fitting.
Where is the 420cc Carburetor for Honda GX340 GX390 Mini Bikes Go Karts cheapest?
At Usa Autoparts Direct, for $65.00, as of our latest check.

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