Used with JIMS 559404 main bearing tool. This adapter is a simple time and money saver when installing the main sprocket shaft bearing on the left side M8 crankcase. Simply position this adapter on top of the bearing support on the press table. When this adapter is used in conjunction with the JIMS 559404 main bearing tool; or OEM tool; the stator can remain attached to the left side case during bearing installation. The technician will save the time of removing and installing the stator. The adapter has been designed with added clearance for the stator screws; which are one time use only screws. It will also guarantee that the case plug seal of the stator is not compromised resulting in a leak. Saves time; saves screws; saves seal and will avoid a costly stator replacement. This adapter is manufactured from 1144 steel; plated in black oxide for corrosion resistance.