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Dellorto Motorcycle Carburettors and Parts

An Italian company founded in 1933, Dell'Orto specialise in the production of carburettors and electronic injection systems. They have produced specialist carburettors for racing motorbikes since the late 1930s and injection systems since the 1980s. Today, the company is a leader in carburation. 

A carburettor is an essential part for your motorbike to function effectively as it:

  • Uses intake vacuum to supply fuel to the engine
  • Combines fuel and air creating a highly combustible mixture
  • Regulates the ratio of air and fuel
  • Controls the speed of the engine


  • Easier to maintain and repair than fuel injection
  • Most mechanics have plenty of experience in repairing carburettors 

Things to look for

When a carburettor is clean and working properly, your engine should start easily from hot or cold, accelerate without any stumbling and idle smoothly. The engine should function with good fuel economy and emissions should be within the limits for the year of your vehicle.

Signs that you may need to repair or replace your carburettor include:

  • Engine flooding
  • Idling too fast
  • Poor fuel economy
  • Hard starting
  • Hesitation
  • Stalling
  • A rough idle

Carburettors can be difficult to rebuild and expensive to replace, so ensure you have a correct diagnosis of the issue before you touch this part.

It’s fairly straightforward to fix or replace a carburettor yourself. You’ll need:

Changes in emission regulations in the early 1980s made carburettors obsolete because they were unable to meet the new requirements. By the mid-1980s, carburettors had been replaced by throttle body and multiport electronic fuel injection systems, which were already the preferred type of engine on luxury and sports vehicles.

Many motorbikes still feature carburettors, although high-performance designs now use fuel injection. This tends to be more expensive, although it may provide better cold starting, better throttle response and improved fuel efficiency, as well as requiring less maintenance.

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