{"product_id":"f43-cmx-tune-tool-free-lsc-220-mm-travel-arctic-leopard-xe-pro-s","title":"Sirris CMX Tune F43 Fork | Arctic Leopard XE Pro S, Enduro \u0026amp; Vetra Blazer","description":"\u003ch1 style=\"text-align: center;\"\u003eSirris CMX Tune F43 Fork | Arctic Leopard XE Pro S, Enduro \u0026amp; Vetra Blazer\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eSirris CMX Tune F43 Fork\u003c\/strong\u003e brings motocross-level suspension technology to the Arctic Leopard XE Pro S, Enduro, and Vetra Blazer. Built for riders pushing these high-power e-motos beyond the limits of standard suspension, the F43 combines \u003cstrong\u003e220mm of travel, 43mm high-tensile steel stanchions, closed-cartridge damping, hydraulic bottom-out control, and billet aluminum triple clamps\u003c\/strong\u003e into a front suspension package made for serious riding.\u003c\/p\u003e\n\u003cp\u003eThis version of the F43 fits the \u003cstrong\u003eArctic Leopard XE Pro S, Arctic Leopard Enduro, and Vetra Blazer\u003c\/strong\u003e. The \u003cstrong\u003eArctic Leopard XE Pro R uses a different F43 fork configuration\u003c\/strong\u003e because of its brake bracket and 240mm rotor setup.\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eRider Weight \u0026amp; Spring Options\u003c\/h2\u003e\n\u003cp\u003eSirris offers two rider weight ranges when selecting the CMX Tune F43. Listed weight ranges are rider weight \u003cstrong\u003ewithout riding gear\u003c\/strong\u003e. Approximately 15 pounds of riding gear is already calculated into the recommended ranges.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e140 lbs to 180 lbs:\u003c\/strong\u003e Medium, 4.0 \/ 3.6 springs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e180 lbs to 220 lbs:\u003c\/strong\u003e Heavy, 4.0 \/ 4.0 springs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eFork spring rates are listed as left side \/ right side.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eFork Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eArchitecture:\u003c\/strong\u003e Upside-down fork\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTravel:\u003c\/strong\u003e 220mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree Length:\u003c\/strong\u003e 775mm, 800mm total length with drop clamp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFork Spacing:\u003c\/strong\u003e 178mm, allowing extensive dirt or street tire options\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFork Weight:\u003c\/strong\u003e 4 kg per leg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStanchions:\u003c\/strong\u003e 43mm high-tensile steel with hard chrome\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Tubes:\u003c\/strong\u003e Seamless 7050 aluminum with Type 3 hard-anodized coating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDropouts:\u003c\/strong\u003e 6061 aluminum with Type 2 anodized coating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrake Mounting:\u003c\/strong\u003e Sized for 220mm rotors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrake Bracket:\u003c\/strong\u003e 220mm rotor brake bracket included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAxle:\u003c\/strong\u003e Custom ultra-stiff, race-grade, ultra-high-tensile hard-chromed axle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel Spacers:\u003c\/strong\u003e Arctic Leopard XE Pro S wheel spacers included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriple Clamps:\u003c\/strong\u003e Drop clamp, billet 6061 aluminum, Type 2 anodized coating, black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteer Tube:\u003c\/strong\u003e Seamless 7050 aluminum with Type 2 anodized coating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStem Mount:\u003c\/strong\u003e 4-bolt direct-mount stem only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeals:\u003c\/strong\u003e NOK MX seals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBushings:\u003c\/strong\u003e Daido MX bushings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuards:\u003c\/strong\u003e High-impact PP with 210-degree wraparound coverage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eReplaceable caliper mount brackets give riders additional flexibility for future brake, caliper, rotor, and wheel upgrades.\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eStem Fitment\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eEarly Arctic Leopard XE Pro S models:\u003c\/strong\u003e Some early bikes may require a direct-mount stem because the Sirris steerer tube cannot be clamped. Sirris recommends a compatible direct-mount option such as a Warp 9 stem or the GritShift Heavy Hitter Adjustable Billet Display Mount.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLater Arctic Leopard XE Pro S models:\u003c\/strong\u003e Later bikes already use a direct-mount stem and do not require a stem upgrade. Check your bike before ordering to verify which stem configuration you have.\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eCMX Closed-Cartridge Damping\u003c\/h2\u003e\n\u003cp\u003eThe F43 uses Sirris' \u003cstrong\u003eCMX, or Compact Motocross Tune\u003c\/strong\u003e, with a symmetrical and adjustable closed-cartridge system backed by a modified spring-loaded IFP. High-flow pistons and fully tunable compression and rebound valving give riders more control over how the fork reacts to braking, repeated impacts, jumps, and rapidly changing terrain.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Oil Circuits:\u003c\/strong\u003e Separate lubrication and damping oils allow the system to further optimize high-speed and low-speed damping performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Flow Pistons:\u003c\/strong\u003e Designed to provide consistent oil flow and a broad range of compression and rebound tuning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydraulic Bump Stop:\u003c\/strong\u003e Hydraulic bottom-out control helps provide softer landings while allowing riders to use the available fork stroke during aggressive impacts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDamper Bodies:\u003c\/strong\u003e Seamless 7050 aluminum with Type 3 hard-anodized coating for durability and scratch resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRebound:\u003c\/strong\u003e Dual-side high-tensile steel spring, adjustable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustments:\u003c\/strong\u003e External compression and rebound adjustment. Compression adjustment is tool-free, while rebound requires a tool.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop Cap System:\u003c\/strong\u003e Motorcycle-style top cap provides more consistent control over steering bearing tension.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"text-align: center;\"\u003eBuilt for Hard Riding\u003c\/h2\u003e\n\u003cp\u003eAt \u003cstrong\u003e4 kg per fork leg\u003c\/strong\u003e, the F43 is intentionally built around strength and rigidity rather than chasing the lowest possible weight. High-power e-motos can generate substantial braking loads and suspension forces, particularly when ridden at speed, jumped, or pushed through technical terrain. The F43's oversized construction and custom race-grade axle are designed to improve steering precision and front-end confidence under those conditions.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003e178mm fork spacing\u003c\/strong\u003e also provides plenty of room for different dirt and street tire combinations. Combined with replaceable caliper brackets, this gives riders more flexibility when building around larger tires, different wheels, or future brake upgrades.\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eFitment\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eArctic Leopard XE Pro S\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eArctic Leopard XE Pro S Enduro\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eVetra Blazer\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFitment Note:\u003c\/strong\u003e This is the \u003cstrong\u003e220mm brake rotor version\u003c\/strong\u003e of the Sirris F43. The Arctic Leopard XE Pro R requires the separate F43 configuration designed around its different brake bracket and 240mm rotor setup.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIncluded wheel spacers are for the Arctic Leopard XE Pro S application.\u003c\/strong\u003e Verify wheel spacing and required hardware when installing the fork on a Vetra Blazer.\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eWho Is the F43 For?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive trail and enduro riders\u003c\/strong\u003e looking for better front-end control through rocks, roots, braking bumps, drops, and technical terrain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJump and track riders\u003c\/strong\u003e who need hydraulic bottom-out control and consistent closed-cartridge damping through repeated hard impacts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArctic Leopard and Vetra Blazer riders\u003c\/strong\u003e building a more capable e-moto with stronger, more adjustable suspension for higher-speed and more aggressive riding.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sirris Store","offers":[{"title":"Medium (140-180 lb) \/ CMX - Drop Clamp \/ Black","offer_id":52573114302754,"sku":"430-99-035-MED-02-DROP-F43-775X220-ARCTICLEOPARD-XEPROS-BLACK","price":2350.0,"currency_code":"USD","in_stock":false},{"title":"Heavy (180-220 lb) \/ CMX - Drop Clamp \/ Black","offer_id":52573114335522,"sku":"430-99-035-HEAVY-02-DROP-F43-775X220-ARCTICLEOPARD-XEPROS-BLACK","price":2350.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0093\/1672\/8892\/files\/sirris-F43-220-arcticleopard-fork-front-CMX-black.jpg?v=1789667267","url":"https:\/\/revrides.com\/products\/f43-cmx-tune-tool-free-lsc-220-mm-travel-arctic-leopard-xe-pro-s","provider":"REVRides","version":"1.0","type":"link"}