Originally Posted by GSGALLANT
They are 8mmx1.25. You'll need bolts long enough to reach the very back of the pulley, because only the rear part of the holes are 8mm and threaded (maybe the last 1/4" or 3/8" at the back of the holes). The front end of the holes are 10mm (or just under, because a 3/8" bolt fits in there) and are not threaded. The front part of the holes are used to insert the crank pulley holding tool, when removing or installing the crank bolt.
Ditto.....and hopefully they aren't rusted at all.
Put some antiseize on the crank nose when you go to reassemble.