1980-1981 Honda Odyssey FL250 Shop Manual, Page 55Get this manual
8 ENGINI
iBefore removing, set parking brakeDRIVE PULLEY
DRIVEN PULLEY
Turn the movable face 90 counterclockwise, pull it toward you to loosen the drive belt and push the loosened belt down toward the hub center
MOVABLE FACE
While h,oldin,g the movable face on described in step