Direct replacement internal damper rod kit to upgrade existing standard front forks for BSA A7 A10 B31 B33 Gold Star, M20 M21 Etc fitting with telescopic front forks, rigid, plunger and swingarm types from approximately 1949 to 1963 , reccomended to be used as a compliment and further upgrade with our progressive forks springs our part number 89.5036/PROGRESS. Add to the handling upgrade and use with SRMTR1 taper roller steering head bearings for the ultimate in fork upgrade.
Kits includes stainless steel top fork nuts, stainless steel top nut washers, alloy damper rod with lower stainless steel valve body and ball oil non return bearing.
Use 215 to 220cc of fork oil in each fork leg, SAE20 grade can be used and for heavier action a 30 grade can be used, it is important that the valve body is fully immersed in oil at full fork extention to ensure correct operation.
