TRX250R.ORG Engine Displacement Calculator

Enter Data Below to Calculate!
Cylinders:       
Bore Size: mm
Stroke Length: mm
Displacement:
 cc
Stock Bore & Stroke:
  • 66mm X 72mm

Common "Kit" Piston Sizes with Stock Stroke:
  • 300cc = 72mm
  • 330cc = 76mm
  • 350cc = 78mm

Other Info & Notes:
  • +4 mil or 4mm stroker crank = 76mm stroke
  • Overbore of 0.010" = 0.25mm
Created by havinnoj for the TRX250R.ORG Forums