Description
Dome – Yamaha 989 Billet Cylinder elevates your build with a purpose-built design made for harsh marine conditions. Replacement dome for the ADA Racing 989 billet cylinder for the Yamaha twin and for the ADA Super Bore Yamaha heads. Squish relief is .010″ at 91mm with a 12.5 degree angle for Sea Doo 951 pistons. Domes are sold individually. Built for reliability, precision fit, and performance you can feel?whether you?re racing, riding surf, or restoring a clean OEM-style setup.
- Replacement dome for the ADA Racing 989 billet cylinder for the Yamaha twin and for the ADA Super Bore Yamaha heads
- Squish relief is .010″ at 91mm with a 12.5 degree angle for Sea Doo 951 pistons
- Domes are sold individually
