To order the correct bearings for the SR motors, we need a few sets of numbers off the block and crank. Pictured are the locations of these numbers. On the block, there is a 5 digit number. On the crank, there are 2 sets of numbers needed. A 5 digit number and below that a 4 diget number. We need all 3 sets of numbers to get the correct bearings for you motor.