PWM Carburetor

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Frequently Asked Questions

What is the most common problem with 2 stroke carburetors?

  • Throttle Slide Design
  • Markings and Stamps
  • Carburetor Size
  • Shape and Design
  • Jetting and Internal Components
  • Build quality Application
  • Serial Numbers or Authenticity Checks
  • Cross-check with manufacturer specs

Is there a difference between a two-stroke carburetor and a 4-stroke carburetor?

Universal carburettors are for both 2-stroke and 4-stroke engines. Some carburettors are for only 2-stroke or 4-stroke engines. They need screening.

Can I use a 4 stroke carb on a 2 stroke?

Fuel usually needs to be mixed well in advance; if it is injected separately, this will damage the engine.
A dedicated 2-stroke carburetor is still recommended.

How does a two-stroke carburetor work?

A two-stroke engine needs only two crankshaft strokes (compression and power) to complete a power cycle.
The carburettor feeds the air-fuel mixture into the combustion chamber during the two-stroke cycle's intake phase. The piston then compresses the mixture, igniting it to produce power.

How do I tell what model my carburetor is?

The carburettor shows the manufacturer, model number, and other IDs.

Do all Keihin carbs use the same jets?

No, not all carburetors jet the same.