[2] The original RX-K 135 was released in 1980 as the top model, fitted with a bikini fairing and imported to Indonesia fully built-up.

The first RX-King had a new reshaped petrol tank and updated seat; because of the raised handle bars this was nicknamed "Cobra" in Indonesia.

[1] The engine benefitted from Yamaha Energy Induction System (YEIS [ja]), developed after extensive customer surveys to meet Indonesian buyers' demand for low-down power and good fuel economy.

Stricter emissions requirements kicked in, and from 2006 the RX-King in Indonesia used a catalytic converter, which allowed it to pass Euro 2 regulations.

[1] Now many people are buying the sought-after motorcycle, in particular the RX-King Cobra because it had genuine Yamaha parts from Japan and had a reputation for being very fast despite only having a 135 cc engine.