{"product_id":"sirris-f43-220mm-fork-cmx-tune-tool-free-lsc-ventus-one","title":"Sirris F43 220mm Fork | CMX Tune | Tool Free LSC | Ventus One+","description":"\u003ch1\u003eSirris F43 220mm Fork | CMX Tune | Tool-Free LSC | Ventus One+\u003c\/h1\u003e\n\u003ch2\u003eBuilt to Dominate Any Terrain, Any Time\u003c\/h2\u003e\n\u003cp\u003eAt REV Rides we spend a lot of time helping riders get more out of compact e-moto platforms, and the \u003cstrong\u003eSirris F43 CMX Fork\u003c\/strong\u003e is one of the most serious suspension upgrades you can put on a \u003cstrong\u003eVentus One+\u003c\/strong\u003e. This fork brings true motocross level suspension engineering to a lightweight electric platform, giving riders a front end that feels more planted, more precise, and far more capable when speeds and terrain start getting rough.\u003c\/p\u003e\n\u003cp\u003eThe F43 CMX combines an oversized \u003cstrong\u003e43mm upside-down race chassis\u003c\/strong\u003e with Sirris’ proprietary \u003cstrong\u003eCMX tuned closed cartridge damping system\u003c\/strong\u003e. The result is razor sharp handling, strong front end support, and the kind of confidence that lets you push harder without the fork feeling vague or overwhelmed. With \u003cstrong\u003e220mm of travel\u003c\/strong\u003e, tool-free compression adjustment, and race-grade construction throughout, this is a premium upgrade for riders who want real performance, not just a cosmetic change.\u003c\/p\u003e\n\u003cp\u003eSirris took their race-proven F43 platform and resized it specifically for compact e-moto bikes. The \u003cstrong\u003e775mm extended chassis\u003c\/strong\u003e, oversized stanchions, and billet clamps create a longer, stiffer, and more controlled front end while still keeping the bike agile. Everything about this fork was designed to reduce flex, improve balance, absorb hard hits, and deliver long-haul durability for riders who actually ride their bikes hard.\u003cbr\u003e\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/n4_QaBwQrRE?si=6srx8KQMC7FEOymB\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch3\u003eOversized Chassis Designed to Outperform\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e43mm hard chrome stanchions\u003c\/strong\u003e resist flex, dents, and wear\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e7XXX series hard anodized uppers\u003c\/strong\u003e maximize strength and durability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e775mm extended fork length\u003c\/strong\u003e creates a longer and more planted front end\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e220mm travel\u003c\/strong\u003e delivers 20mm more suspension travel than stock style compact e-moto forks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight billet aluminum clamps\u003c\/strong\u003e increase stiffness and reduce twisting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e178mm fork spacing\u003c\/strong\u003e allows nearly unlimited tire choices for dirt or street setups\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect mount stem compatibility\u003c\/strong\u003e improves cockpit stiffness and front-end feel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom ultra stiff chromoly axle\u003c\/strong\u003e improves steering precision and predictability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotorcycle style top cap\u003c\/strong\u003e helps maintain more consistent steering bearing tension\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaceable brake caliper adapters and swappable wheel spacers\u003c\/strong\u003e allow future wheel and brake upgrades\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis fork is not just stiffer. It is stronger where it matters, more controlled in hard impacts, and built to keep working lap after lap without giving up predictability.\u003c\/p\u003e\n\u003ch3\u003eRace Grade CMX Closed Cartridge Damping\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the F43 CMX is Sirris’ \u003cstrong\u003eCMX tuned symmetrical closed cartridge damper\u003c\/strong\u003e. This is the most advanced damping system they have put into a compact platform. It delivers pro-level damping with separate oil paths for lubrication and damping, high-flow internals, and fully tunable compression and rebound circuits that stay cool and consistent during aggressive riding.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCMX Compact Motocross Tune\u003c\/strong\u003e built for aggressive compact e-moto riding\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrue symmetrical closed cartridge design\u003c\/strong\u003e for fade-free damping\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndependent oil circuits\u003c\/strong\u003e separate damping and lubrication oil\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-flow pistons\u003c\/strong\u003e with fully tunable compression and rebound valving\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydraulic bottom-out control\u003c\/strong\u003e helps save harsh landings on big hits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e7XXX series internal components\u003c\/strong\u003e are hard anodized to reduce wear\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium Daido bushings and NOK MX seals\u003c\/strong\u003e deliver smooth action and long service life\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe CMX tune gives the Ventus One+ a planted, confident ride feel right from the first ride. It stays predictable when you are on the gas, and it gives riders room to tune the fork around their speed, terrain, and preference.\u003c\/p\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/y8ZjgHK3_Vc?si=3FkKGJa3XNa6oJMZ\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch3\u003eTool-Free Compression Adjustment\u003c\/h3\u003e\n\u003cp\u003eThe F43 CMX includes \u003cstrong\u003etool-free compression adjusters\u003c\/strong\u003e, so quick setup changes are easy without needing a screwdriver. Riders get nearly \u003cstrong\u003e30 clicks of external compression adjustability\u003c\/strong\u003e, making it simple to fine tune the fork for different terrain or riding styles.\u003c\/p\u003e\n\u003ch3\u003eDirect Mount Stem System\u003c\/h3\u003e\n\u003cp\u003eThe Sirris steerer tube and top cap system are designed around a \u003cstrong\u003edirect mount stem setup\u003c\/strong\u003e. This improves clamping stiffness and steering bearing torque retention, similar to what you would expect on a larger motorcycle. It is one of those design details that helps give the fork a more locked-in and confidence inspiring front-end feel.\u003c\/p\u003e\n\u003ch3\u003eOptional Drop Clamp for Big Wheel Builds\u003c\/h3\u003e\n\u003cp\u003eThe optional \u003cstrong\u003edrop clamp\u003c\/strong\u003e raises the front end an additional \u003cstrong\u003e25mm\u003c\/strong\u003e, extending fork length to approximately \u003cstrong\u003e800mm\u003c\/strong\u003e. This makes it possible to run a \u003cstrong\u003e21 inch front wheel\u003c\/strong\u003e while maintaining bike balance when paired with a longer rear shock or taller rear setup.\u003c\/p\u003e\n\u003ch3\u003eAxle and Brake Mount System\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCustom ultra stiff chromoly axle improves steering precision and predictability\u003c\/li\u003e\n\u003cli\u003eReplaceable caliper mount brackets allow brake upgrades\u003c\/li\u003e\n\u003cli\u003eDesigned for \u003cstrong\u003e220mm brake rotor setups\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eAll Sirris brake brackets are designed for 220mm rotors only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\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 220 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree Length:\u003c\/strong\u003e 775 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Length with Drop Clamp:\u003c\/strong\u003e Approximately 800 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFork Spacing:\u003c\/strong\u003e 178 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 4 kg per leg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStanchions:\u003c\/strong\u003e Ø43 mm high tensile steel, hard chrome\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Tubes:\u003c\/strong\u003e Seamless 7050 aluminum, Type 3 hard anodized coating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrop Outs:\u003c\/strong\u003e 6061 aluminum, Type 2 anodized coating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAxle:\u003c\/strong\u003e Ultra high tensile hard chromed axle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriple Clamps:\u003c\/strong\u003e Billet 6061 aluminum, Type 2 anodized coating, Black or Blue\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteer Tube:\u003c\/strong\u003e Seamless 7050 aluminum, Type 2 anodized coating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDamping:\u003c\/strong\u003e Symmetrical adjustable closed cartridge with spring backed modified IFP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDamper Bodies:\u003c\/strong\u003e Seamless 7050 aluminum, Type 3 hard anodized coating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompression Adjustment:\u003c\/strong\u003e External tool-free compression adjuster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRebound:\u003c\/strong\u003e Dual side high tensile steel spring, adjustable, rebound adjusted using tool\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\u003eFork Guards:\u003c\/strong\u003e High impact PP, 210-degree wraparound\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpring Rate Options\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedium:\u003c\/strong\u003e 140 to 180 lb rider weight, 3.6 \/ 3.6 springs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy:\u003c\/strong\u003e 180 to 220 lb rider weight, 4.0 \/ 3.6 springs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRider weight ranges are based on body weight without riding gear. Sirris factors approximately 15 pounds of riding gear into the stated weight ranges. Any heavier upgrades like a battery, controller, or other major components should also be added to rider weight when selecting spring rates.\u003c\/p\u003e\n\u003ch3\u003eCMX Tune Setup Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFactory settings are measured in clicks from the fully closed position\u003c\/li\u003e\n\u003cli\u003eOnce closed fully clockwise, back the adjusters out counter-clockwise to the recommended starting point\u003c\/li\u003e\n\u003cli\u003eRiders near a weight cutoff may need preload adjustment to dial in sag\u003c\/li\u003e\n\u003cli\u003eVery aggressive or pro riders may benefit from moving up one spring class and reducing preload\u003c\/li\u003e\n\u003cli\u003eRider preference and terrain may require additional tuning changes\u003c\/li\u003e\n\u003cli\u003eExample: a 160 lb rider with 20 lb of added upgrades calculates to 180 lb total system weight\u003c\/li\u003e\n\u003cli\u003eAggressive rider at 180 lb would typically lean toward the heavy tune with lower preload\u003c\/li\u003e\n\u003cli\u003eRelaxed rider at 180 lb could run the medium tune with higher preload\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVentus One+\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWho This Fork Is Perfect For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVentus One+ riders building a \u003cstrong\u003epremium race ready or track focused setup\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eTrail riders who want \u003cstrong\u003emaximum front end confidence, durability, and control\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigh performance builds that need \u003cstrong\u003etrue motocross level suspension performance\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"product-block product-block--tab\"\u003e\n\u003cdiv class=\"collapsibles-wrapper collapsibles-wrapper--border-bottom\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sirris Store","offers":[{"title":"Medium (140-180 lb) \/ CMX - Standard Clamp \/ Black","offer_id":51503119696162,"sku":"430-99-023-MED-02, 43MM USD, 775MM X 220MM, 25MM OFFSET, VENTUS ONE+, MED, BLACK","price":2250.0,"currency_code":"USD","in_stock":true},{"title":"Medium (140-180 lb) \/ CMX - Standard Clamp \/ Blue","offer_id":51503119728930,"sku":"430-99-023-MED-04, 43MM USD, 775MM X 220MM, 25MM OFFSET, VENTUS ONE+, MED, BLUE","price":2250.0,"currency_code":"USD","in_stock":true},{"title":"Medium (140-180 lb) \/ CMX - Drop Clamp \/ Black","offer_id":51503119761698,"sku":"430-99-023-MED-02-DR, 43MM USD, 775MM X 220MM, 25MM OFFSET, VENTUS ONE+, MED, BLACK, DROP CLAMP","price":2350.0,"currency_code":"USD","in_stock":true},{"title":"Heavy (180-220 lb) \/ CMX - Standard Clamp \/ Black","offer_id":51503119794466,"sku":"430-99-023-HVY-02, 43MM USD, 775MM X 220MM, 25MM OFFSET, VENTUS ONE+, HVY, BLACK","price":2250.0,"currency_code":"USD","in_stock":true},{"title":"Heavy (180-220 lb) \/ CMX - Standard Clamp \/ Blue","offer_id":51503119827234,"sku":"430-99-023-HVY-04, 43MM USD, 775MM X 220MM, 25MM OFFSET, VENTUS ONE+, HVY, BLUE","price":2250.0,"currency_code":"USD","in_stock":true},{"title":"Heavy (180-220 lb) \/ CMX - Drop Clamp \/ Black","offer_id":51503119860002,"sku":"430-99-023-HVY-02-DR, 43MM USD, 775MM X 220MM, 25MM OFFSET, VENTUS ONE+, HEAVY, BLACK, DROP CLAMP","price":2350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0093\/1672\/8892\/files\/sirris-F43-220-VENTUS-ONE-suspension-fork-front-CMX-black_7140f1f8-458d-4f13-920f-6f63e9e80d3d.jpg?v=1775673780","url":"https:\/\/revrides.com\/products\/sirris-f43-220mm-fork-cmx-tune-tool-free-lsc-ventus-one","provider":"REVRides","version":"1.0","type":"link"}