Patented fork seal features a balanced 3 lip design that evenly distributes the pressure reducing operating temperature wear and friction. Custom Elastomer Fork Seals have been tested to outlast OEM fork seals. Extends typical seal life by 3 to 5 times over OEM seals. Stiction (friction) measures from 1/3 to less than OEM seals for smoother fork action. Lower Stiction Longer Life! It doesn't get any better than this! Plus the Only complete line of Dust Wipers! Wipers should be replaced with the fork seals to assure peak performance.Quality design and construction of every All Balls piece meets the toughest standards and conditions - from daily commuting to full-on racing all older bearing and seal designs are upgraded to the best and latest specs and designs. All Balls fork dust seals are made using the same high quality process as their fork seals providing outstanding quality and performance exceeding OEM specifications. Fits: Honda CB360 1974-1977 CB400A 1978 CB400F 1975-1977 CB400T 1978-1981 CJ360T 1976-1977 CR80 1984 CX500 1979 CX500C 1979-1980 TL250 1975-1976 Kawasaki KX80 1983 KZ400 1974 KZ400A 1977-1978 KZ400B 1978-1979 KZ400C 1978 KZ400D 1975-1977 KZ400S 1975-1977 Suzuki GN250 1982-1988 GS250 1980-1981 GS400B 1978 GS425 1979 GS450E 1980-1983 Yamaha XS360 1976-1977