
The Bitubo XZEV Rear Monoshock, part number K0109XZE31V2, is a rear-suspension replacement and upgrade for 2018+ Kawasaki Z900RS. The setup combines hydraulic spring preload, rebound, length adjustment. It replaces aging factory damping with a purpose-built Bitubo component while adding the adjustment range specified for this exact part. That gives you a more useful setup window for matching the chassis to rider weight, load, and intended use instead of being locked into a one-setting stock suspension package.
Key Features & Specs:
Fitment:
Kawasaki:
About Bitubo XZEV Series:
Bitubo’s nitrogen-pressurized road monoshock platform uses a floating oil/gas separator and application-specific calibration. The XZEV version adds compact hydraulic spring preload, rebound, and adjustable length where under-seat space favors the compact adjuster, keeping the upgrade focused on useful chassis adjustment rather than unnecessary complexity.
About Bitubo Suspension:
Founded in 1963, Bitubo develops motorcycle suspension and damping systems for street, racing, V-twin, scooter, Vespa, and off-road applications. Bitubo continues to design, engineer, develop, and manufacture its suspension products in Italy, drawing on decades of R&D and competition experience. For Elite Race Fab customers, it is the kind of hardware we like to see: purpose-built components, useful adjustment where the application calls for it, and a clear focus on getting the chassis working the way it should.