Crankshaft thrust washer set for 997, 998cc and 1098cc w/ 1.75" mains. Always replace the thrust washers with any engine build, and confirm that they are clearanced properly. Too tight or loose and you can have lots of engine damage as a result! Available in standard, +.005", and +.010".
 
These will not fit 848cc engines or 10CC engines (Spridget/Minor) with 2.00" mains.