HI Im renovating my fathers old 1980 xl250s and im looking out for new front forks as the current ones are shot to peices. Apparently there are 2 250s derivatives, a 250sa and a 250sb! Mine happens to be a 250sa but i have found front forks for a 250sb, does anybody know the diffrence? Will they fit? otherwise can anyone suggest other front forks that will fit.