These are replacement shock shaft seal head bushings from Schmidty Racing Suspensions. Available for 14mm or 16mm shock shafts with different height options.
The rear shocks on Honda ATC 250R (1983-86) and TRX 250R (1986-87) use 14mm x 10mm bushings. The rear shocks on Honda TRX 250R (1988-89), TRX 400EX (all years), and ATC 350X (all years) use 14mm x 12mm bushings.
14mm Shaft Size:
16mm Shaft Size: