Seat with rail
/5 long swingarm and /6 first series (longitudinal ribbed cover)
Low-cost reproduction.
For i.e. 75/6 first series (later series had cross-ribbed cover)
Compare: 52531233960 / 52-53-1-233-960
Seat cover GS black-yellow, high
Compare: 52532307340...
Seat cover
R90S second series, R100S, CS, RS, RT...