NJB's are close to the old Girlings, its ran by an ex Girling employee. They are good for what they are but limited as they have good compression damping but limited rebound and all none adjustable. I buy Koni's off ebay, last set was £38 including postage and will cost another £30 to rebuild including new seals, powdercoating springs and bodies, Stainless steel nuts, washers and new eye rubbers. This last set will give me 5 sets for 2 Commando's, one T120R and 2 BSA's leaving some scramble NJB's for a BSA. Even the old 76 series can be rebuilt using the 7610 seals and seal holder by making up the difference in height with 3 or 4 washers in the base below the tube, the disadvantage of losing the dial a ride is offset by the finer adjustment of the rebound damping. The worst thing about the 76 series is the stupid compression bump stop washer which dissolves in the damping oil and the crud blocks the damping passageways, all the ports have to be cleaned out and the washer replaced with a nylon copy.
