87-93 KAWASAKI EX500A: BikeMaster Fork Seals High-quality fork seals available for virtually every brand and model sold in the U.S.A. Most performance models are now available in genuine "NOK" anti-stiction material. All oil seals and dust wipers are made in Japan. Sold as a pair. Note: Some fork seal dimensions listed are the actual size of the seals before installation and not the size of the forks.