This is Ex-Garland from Megazone 23 . Megazone 23 is a sci-fi anime about motorcycle than can turn into mecha robots.
The story of Megazone revolves around A young hero (Shogo Yahagi) probes a deadly government agenda after finding a sinister secret weapon.
The bike here first introduced by Shinji Nakagawa to Shogo as Bahamut as it can reach over of 300 km/h. Later Shogo change its name to Garland.
Shinji later was killed by the government military because Bahamut is actually a supercomputer that controls the events in this world
The series debuted in 1985. Designed by Toyoppe