I'm mulling something over and looking at some parts.
Anyone know who made the FJ forks? Specifically, the 88-up ones.
Yamaha forks are typically Showa and sometimes KYB, but I suppose it could be something random.
From this write up I'd say Kayaba.
https://www.teknikmotorsport.com/Motorcycle-Suspension-KYB-Kayaba-Showa (https://www.teknikmotorsport.com/Motorcycle-Suspension-KYB-Kayaba-Showa)