No longer available from Yamaha. Probably better than an NOS original as this one is not 35+ years old and brittle. 3rd pic shows flexibility.
1KT-16321-00 Clutch Friction Disc Plates Fit For YMH WR250R TDR250 TDR240 TTR250 TZR250 TZR250R R1-Z 250 3XC R1Z350 3XJ1632100
Yamaha TDR250 (1988-1992) Wezmoto Standard Front Stainless Braided Brake Line
Genuine Yamaha TDR250 2x Yellow Fork Gaitors 2YK-23191-00 Gaiters - T4-06
Yamaha TDR250 Ignition Coil RZ YPVS -- C3-03
Yamaha TDR250 piston kit standard (1988-1990) 56.40mm bore size - Japanese
Yamaha TDR250 Front Brake Master Cylinder 14mm Single Disc TDR125 -- C1-05