Many thanks,Eddie,for the info. and the advice.I think this is the hardest front end suspension of any motorcycle I've ridden,and the rear is nearly as bad!The front units are early Girling,with the dismantlable damper,and these were re-conditioned in the1990s.The rears are,I think,later Girlings.The bike has only done 800 miles since fitting.They are all comply to the lengths you quoted.I was surprised Hagon had so little info,.and I may do some more Googling,but with the poundage you quoted as well,I have something to go by for the moment.Thanks again ,Eddie.