# Carburettor

> A carburettor is the mechanical fuel system component that mixes petrol into the incoming air in the correct proportion.

- **Also known as:** Karbüratör, Karbirator, Carburetor, Karbüratör takımı
- **Turkish term:** Karbüratör
- **Category:** [Carburettors & Parts](https://motorsikletparcasi.com/en/category/carburettors-and-parts)
- **Page:** https://motorsikletparcasi.com/en/glossary/carburettor

As air passes through the carburettor's narrowing throat (venturi) it speeds up and its pressure drops; this pressure difference draws petrol from the float bowl through the jets. Main parts: float and needle valve, **pilot (idle) jet**, **main jet**, jet needle and slide (vacuum or mechanical).

## Common problems

- Hard starting, stalling at [idle](https://motorsikletparcasi.com/en/glossary/idle-speed) – blocked pilot jet
- Misfiring, loss of power – dirty jets, air leaks
- Fuel overflowing – worn float needle

On bikes left standing for long, petrol can go stale in the carburettor and clog the passages. Because of emission rules, most new motorcycles use [fuel injection](https://motorsikletparcasi.com/en/glossary/fuel-injector) instead.

## Related terms

- [Choke](https://motorsikletparcasi.com/en/glossary/choke): The choke enriches the fuel-air mixture (adds more fuel) to help start a cold engine.
- [Idle speed](https://motorsikletparcasi.com/en/glossary/idle-speed): Idle speed is the lowest engine speed at which the engine keeps running with the throttle closed.
- [Fuel injector](https://motorsikletparcasi.com/en/glossary/fuel-injector): A fuel injector is the solenoid valve in fuel-injected engines that sprays pressurised fuel into the intake on command from the engine control unit (ECU).
- [Air filter](https://motorsikletparcasi.com/en/glossary/air-filter): An air filter stops dust and particles in the intake air, protecting the cylinder, piston and rings from wear.

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- Source page: https://motorsikletparcasi.com/en/glossary/carburettor
- Last updated: 2026-10-09
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