PRIMARY GEAR THRUST WASHER 1275cc .133"

Primary gear thrust washers are made in varying sizes to take up the play. Standard gap size should be between 3-6 thou. 

This type is for the 1275cc crankshaft only which has a raised step for the primary gear to sit on. Thrust washer 0.133"

The measurement is taken as plus or minus one to the size hence the two thou tolerance on each part number.