Sirris F43 XE Trail Tune Fork
Super responsive, purpose-tuned, and built specifically for the Zero XE. The Sirris F43 XE Trail Tune fork brings true closed-cartridge suspension performance to the front of the bike, with two independent sealed dampers engineered for consistent support, reduced friction, and confident trail control.
Developed as a direct-fit upgrade by Sirris and tuned by Zero Motorcycles for the XE platform, this fork is built around wide-range trail valving, adjustable low-speed compression, adjustable rebound, and spring-preload tuning to match rider weight, terrain, and riding style. Balanced with the XE chassis—not adapted from a generic race setup—it delivers the comfort, traction, and front-end confidence needed to elevate the bike’s trail capability.
FORK SPECS:
Architecture
Upside down fork
Travel
220 mm
Free length
830 mm
Fork weight, includes clamps and steerer
22 lbs / 10kg
Stanchions
Ø43, high tensile steel with hard chrome
Outer tubes
Seamless 7050 aluminum, type 3 hard anodized coating
Drop outs
Forged 6061 aluminum, type 3 hard anodized coating
Triple clamps
Forged 6061 aluminum, type 3 hard anodized coating
Steer tube
Seamless 7050 aluminum, type 2 anodized coating
Damping
• Symmetrical and adjustable closed cartridge with spring backed modified IFP
• High-flow pistons + fully tunable compression and rebound valving
• Dual oil circuits for optimum performance. Separating lubrication and damping oils allows us to further optimize high and low speed damping performance.
• Balanced load, race-ready, high performance. No matter how hard you ride or how many laps you take, our closed cartridge forks will never fade and will always feel predictable.
• Hydraulic bump stop is a hydraulic bottom out control system that gives you soft landings and max stroke even on the most aggressive impacts.
Damper bodies
Seamless 7050 aluminum, type 3 hard anodized coating
Rebound
Dual side high tensile steel spring, adjustable
Adjusters
External compression and rebound adjustment
Seals
NBR
Guards
High impact PP, 210-degree wraparound
- XE
