I'd say bit later than that, cool it's a B series. Book says switched toraidan73":rwtfr5bn said:Probably an early 1991 I think
Check page 270 in Paul's book. says April 91 started B series.sovereign":36e4o86i said:B series started in April '90, so this should be a '91. The climbMax was always 1" I guess, so could be only catalyst or sovereign. From the seatstays I would say it's a sovereign