Guys guys guys,
Please do not use a chisel, one wrong move and you could do alot of damage to that clutch shaft. After you remove the cover, then remove the 7 bolts around the clutch( this is NOT under any presure from the spring) then remove that outer part of the clutch, reach in , grab the spacer and remove it, now retorque the 7 bolts, done. No need to remove the clutch and no fancy tool needed. You will gain 5 mph.
Martin