Complete Set Of High Quality Main Bearings For All Type 1,2,3 Engies. Fit 1200Cc (40Hp)- 1600Cc Based Engines. .020 Over Align Bore Case & .010 Under Crank. These Have A .040 Thick Rear Bearing For Cases That Have Had The Rear Thrust Machined. You Must Machine This Bearing To Fit Your Case.