The all-new ET 142mm x 3.2mm spacer do it yourself. New generation wheel for 2016 Seadoo 300 platform. Makes 23psi at 9000 RPM The new 1.6L engine is designed for midrange to 8800 RPM. ET does not recommend revving over 9000 rpm.
Requires the back housing to be machined to 143mm
Recommended slip moment be set to 18-foot lbs
There are a few things that are recommended in updating before running any performance. Replace all hose clamps with screw clamps. Re-torque all head bolts, ECU remap to 8600 to 8800 rpm rev limit.