Genuine paddock stand bobbins doubling as crash protectors with 6mm thread. Generic to all Yamaha with 6mm thread The GBRacing bobbins really complete the protection bundle. They also double up as paddock stand mounting points.
The bobbins are great and easy to use, the only problem is the bolts they give you to bolt them onto the swinging arm are the wrong length, well the left hand one is. It's not long enough to screw the chain guard lower section on.