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Forged piston by Competition Distributing

Item №

Higher compression forged pistons to fit most all Harleys from 1915 to 1929, singles and twins, as well as many other early motorcycles. They are sold as pairs including rings, wrist pin, and snap rings. The selection includes oversizes of +.015”, +.025”, +.035”, +.045” and +.055”. All rings come + .005” over piston size. Sometimes fitting is required. Recommended piston clearance is + .005” to + .008”. Wrist pin size is .625” (61”/1000cc) or .791” (74”/1200cc). Compression ratio is approx. 6:1 (stock is 4.5:1) but pistons can be machined down to lower compression if you desire.

  • fits 74 cui Models 1921-1929
  • aluminum
  • Ø 87.9 mm
  • Over-/Undersize: +0.025 ”
  • nominal bore: 3-7/16 ”
  • compression: 6:1
  • with rings, 0.791” wrist pins and snap rings
  • USA
  • gross weight: 760 g

Oil rings for IOE pistons

Actual oil rings supplied with the pistons may differ from those pictured. This does not affect function.

net price*
* United States of America: Tax free shipping. Please check your local import fees.
In stock. Ready for immediate delivery from our Würzburg, Germany warehouse
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