The 800 series from Arreche (Amal) carburetors offer bore sizes from 16mm up to 21mm. These carburetors are available for many of todays most popular brands of scooters. For many current bike models, you still retain the original electric choke assembly. If desired the manual assembly can also be used instead. The fitting of these carburetors is extremely simple and are even designed to fit the original airbox. Many after market filters can also be used if desired. When properly installed the customer will get significant engine performance improvements. Little or no modifications are even required to be made to the stock throttle cable in most cases. Moped Hospital Racing is the US distributor of Arreche carburetors and scooter parts.