Yamaha WR400 F all models from 1998 to 2000 (46mm forks). 2x Inner fork Bushes. 2x Outer fork Bushes. The answer is easy, Pyramid Parts Oil seals are all Low Stiction (low friction) seals designed specifically for motorcycles.
Before I start, I have been working on motocross bikes for 25 years. I have used these seal and bush kits in the past when working on low cost bikes for friends with a minimal budget and they have been okay. This time the seals were very hard and too large to fit correctly. Poor quality control, and I ended up binning the oil and dust seal and purchasing OEM which I should have done in the first place. The bushings were fine though.