With a suspension system, the enemy of a good action is 'stiction' & ineffective damping. The Triumph/BSA conical & disc type front ends suffer from both of these problems.
This set (1 per bike) of replacement damper sealing rings replace the standard rubber o-ring. Made of composite material, they operate like a Dykes type piston ring with very low stiction on small bumps while larger faster bumps provide higher wall pressures for improved damper control.
Code: 97-4003A Description: SEAL KIT,DAMPER,PROG/SUSP,TRI