316-435-3837 mike@stolcreek.com

Big Bore Kit – 1621cc

Billet big bore cylinders for Rotax 9 series engines.

 

  • 1621cc
  • Available in any compression ratio from 7:1 – 11:1 CR
  • 120-130HP
  • Comes with custom under cut EP forged pistons
  • Allows the use of 91-OCT fuel (11:1 must have 93+OCT or 100 LL)
  • REQUIRES CRANK CASE AND CYLINDER HEADS TO BE MACHINED FOR PROPER CLEARANCE
  • Billet machined cylinders, not casted. Greater density and heat transfer
  • Media blasted finish for better heat dispatchment and increased surface area
  • Not sleeved like other kits
  • Nikasil plated cylinders, will last forever. Same technology as OEM uses as well as all MC mfg.’s
  • Reports of 15c° lower CHT’s
  • Piston weight 318gr vs 465gr standard
  • CP custom forged race pistons. Lightweight and weight matched to +/- 1gram Nikasil cylinders allow for tighter cylinder/piston clearance
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