Here we have a CTC Yamaha TY250Z lightweight Aluminium swinging arm spindle 1LX-22141-00.
This has been CNC'd from 7075 T6 aerospace grade aluminium, so it is not only light but very strong too.
This spindle comes with a matching nut made from the same material.
This spindle also fits the following bikes:
TZ 125 - 94-2000
WR200R - 92-95
WR250Z - 91-98
YZ125 - 87-2005
YZ250 - 89-2004
YZ490 - 1987