It has an aluminium box frame with the separate rear frame bolted on , and a chain drive single - sided swing arm .
The US model NT650 , Hawk GT 647 , RC31 was introduced in 1988 and produced through 1991 .
NT650 has an aluminium box frame with the separate rear frame bolted on , and a chain drive single - sided swing arm .
The US model NT650 , Hawk GT 647 , RC31 was introduced in 1988 and produced through 1991 .