CRS S-1 to S-88 Engine Differences

  • The lower rod bearing and crank pin have increased in size from 20mm to 24mm for longer rod life.
  • 2nd gear has been adjusted to enhance corner exit speeds at most tracks.
  • Bore increased to maximize port area due to bore/stroke relationship. 
  • Redesigned water passages in cases and cylinder for increased cooling.

 Owners Manuals