Kalistratov .45 One of the most well-crafted mass production engines in the Radio-Controlled Boat Racing power plants, and owner of many of its own World Championship accomplishment, the Kalistratov .45 (AKA K45) is back on the block. If you are looking for a quality but less expensive alternative to the competition bolt in a K45. Test Tune and Go Racing. Built to be competitive out of the box. Bore = .866” Stroke = .772 Exhaust timing = 180 degrees Intake timing = 126 degrees. I also have spare parts for this engine.

Recommended carb:

ROSSI 10343-46  BORE 11mm(.433") or the SPEEDMASTER 45 SPDC-11  BORE .390"