Wiseco piston conversion kit, reverse dome 9.5:1 compression standard bore + .020″ oversize for Harley Davidson Sportster 883cc to 1200cc. Wiseco Pistons are forged from hi-silicon aluminum alloy for superior strength and dependability. The unique piston shape allows tight piston to wall clearances for quieter operation. Grooves are machined around the top ring lands to reduce detonation and improve the sealing power of the top ring. Pistons are machined with valve pockets that are deeper and larger than stock. These pockets provide adequate valve clearance for most high lift cams, but as with any high performance upgrade all clearances must be checked.
- Wiseco piston conversion kit 883cc to 1200cc 9.5:1 compression,, standard + .020 inch Oversize Bore
- Includes 2 Reverse dome pistons, rings, pins and lock rings
- No headwork required
- Forged from hi-silicon aluminum alloy
- Tight piston to wall clearances for quieter operation
- Enlarged valve pockets
- For Harley Davidson Evolution Sportster 883cc 1986 – later