No overboring needed: this set fits the standard 86mm cylinder of the FX SHO and gives 10.5:1 compression for stronger response.
Forged aluminum construction with a custom skirt cam and barrel profile and accumulator grooves.
- Fits Yamaha FX SHO 2008-2012
- 86mm standard bore (1812cc)
- 10.5:1 compression
- Forged high-strength aluminum