C90 carburettor - The Small Workshop

Honda C90 - putting it back together

Intro If you have dismantled your bike in order to refurbish it then, once you have finished reassembling the engine,

There are only a few things that can go wrong with the simple carburettors used on the Honda c90 and

Fuel evaporates poorly at lower temperatures and, when the engine is cold, tends to condense on the walls of the

The idle circuit, sometimes called the pilot or slow circuit, controls the mixture of fuel and air at low throttle

The carburettor has two independent systems for metering fuel and air, the main circuit and the idle circuit. The idle

Parts The engine needs a constant supply of fuel – the parts involved are marked on this picture of the dismantled

One of the first things I did when trying to get my old Honda C90 to run was to clean

Introduction Honda’s Super Cub step-through motorcycle is the most successful motor vehicle ever built and a staggering number – well