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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