It had an aluminum frame, a full fairing and a high output straight-twin engine.[62][63] The 1983 RG250Γ is one of the JSAE 240 Landmarks of Japanese Automotive Technology.[64] RG500 Gamma of 1985 was like RG250, but with a square-four engine.[65] RGV250 Gamma, the road-racing replica of Kevin Schwantz's RGV500 GP race bike, replaced the RG250 in 1988 with a V-twin engine.[66]