[2] The EB-series is a 547 cc (0.55 L) version built in Daihatsu's Osaka plant in Japan from mid-1985, meant for their domestic market range of Kei cars.
The EB-series was only ever available with an SOHC valvetrain and two valves per cylinder, as Daihatsu were late to adopt multi-valve technology for their kei car range.
There is also a rare supercharged version developed for the Hijet Pickup, to provide extra low-down torque and allow for an air conditioning unit to be fitted and used even when heavily loaded.
The ED-series had undergone several changes from being carbureted 'ED-10' to 'ED-DE' where the introduction of fuel injected DOHC had been introduced, reviving this newly redesigned engine.
There was also a short-lived special version for the Swiss markets, where several cantons had tax systems which favoured cars of less than 800 cc.
This, the ED-10A, had a two millimeter narrower bore (64.6 x 81 mm) for a displacement of 796 cc, and had also been license-made by the now-defunct Asia Motors to be fitted in the Towner, which was a licensed copy of the Daihatsu Hijet.
The EF was nearly as light as its predecessor, with a 2004 EF-SE clocking in at 68 kg (150 lb) - this with the added weight of modern emissions equipment and fuel injection.
An upgrade of this engine was made after the introduction of Daihatsu Mira Avy L250 series (Exported out of Japan Models)/Perodua Viva & Perodua Myvi's First Generation in 2007, where the new engine was known as 'EJ-VE' which was included with a DVVT system for fuel efficiency and meeting new Euro standards.