There are a few chain rollers on this model 5 in total. The plastic mud guard on 2k6 is different to that of YZ D 1W1 they are similar and can be retro fitted.
NOS Parts fitted,
All chain rollers.
All swing arm bearings.
All seals on swing arm.
Pivot Bolt nut and washer.
Mud deflector and CDI holder.
CDI Box.
Handle Bars
Spark plug cap