F43 MX Tune | Tool Free LSC | 260 mm Travel | Surron Ultra Bee 1.2
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F43 MX Tune | Tool Free LSC | 260 mm Travel | Surron Ultra Bee 1.2
Description
MORE TRAVEL. MORE PERFORMANCE.
Now featuring 260mm of travel, tool-free LSC adjustment, Torx fasteners, and updated graphics.
MX Tune is purpose-built for motocross performance. Its race-focused setup delivers the balance, control, and bottoming resistance needed to charge through big jumps, hammer whoops, and attack fast corners at race pace.
RIDER WEIGHT SPECS:
Sirris offers five weight ranges to choose from when selecting your Trail Tune F43 fork. (Listed weight ranges are rider weight without riding gear on. 15 pounds of riding gear is calculated into the weight ranges)
< 160 lbs (Light = 4.4/4.4 springs)
160-200 lbs (Medium = 5.0/4.8 springs)
200-240 lbs (Heavy = 5.4/5.0 springs)
240-280 lbs (X Heavy = 5.4/5.4 springs)
> 280 lbs (XX Heavy = 5.4/5.4 springs)
Fork spring rates listed above are left side/right side.
FORK SPECS:
Architecture
Upside down fork with symmetrical and adjustable pressurized closed cartridge dampers
Travel
260 mm
Free length
856 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
Brake mounting
Sized for stock Ultra Bee calipers and 240mm rotors
Triple clamps
Forged 6061 aluminum, type 3 hard anodized coating
Steer tube
Seamless 7050 aluminum, type 2 anodized coating
Damping
• MX tune
• Symmetrical and adjustable closed cartridge with spring backed IFP
• High-flow pistons and fully tunable compression and rebound valving
• Dual oil circuits for optimum performance. Separate oil circuits deliver optimized damping and lubrication performance.
• Balanced, race-ready, high performance. No matter how hard you ride or how many laps you put in, Sirris closed-cartridge forks deliver consistent, fade-resistant performance and predictable handling lap after lap.
• The hydraulic bump stop system provides progressive bottom-out control, delivering softer landings and maximum usable travel, even under the most aggressive impacts.
Damper bodies
Race-grade internals: Seamless 7050 aluminum, type 3 hard anodized coating providing high durability to keep your ride in top condition.
Spring
Dual side high tensile steel spring, adjustable preload
Adjusters
External tool-free compression, rebound adjustment
(rebound adjusted tooled to ensure durability in the harshest environments)
Seals
NOK Heavy Duty seals
Bushings
Premium Daido bushings (Custom Sirris proprietary design)
Guards
High impact PP, 210-degree wraparound
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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