set of 4 pistons complete with rings, pins, clips etc. available in the following sizes. oversize 0.030" (+30), oversize 0.040" (+40), oversize 0.050" (+50) or oversize 0.060" (+60). compression height from centre of pin to top approximately 24mm, gudgeon pin 11/16" diameter (17.46mm). used in model C engine. limited availability. WE DO NOT HAVE ALL SIZES LISTED - presently +30, +40 & +60 ONLY. due to different makers piston type will vary to picture, some have 3 ring per piston, others 4 ring.
standard bore of engine measures 2.50" (63.50mm), oversize measure 0.010" = 0.254mm, 0.020" = 0.508mm, 0.030" = 0.762mm, 0.040" = 1.016mm, 0.050" = 1.270mm, 0.060" = 1.524mm. please carry out machine work on engine parts when you have the replacement pieces actually to hand. we can not be held responsible for any variations on measurements which are for guidance purposes only.
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