{"product_id":"f43-cmx-tune-tool-free-lsc-220-mm-travel-surron-light-bee-x","title":"Sirris F43 CMX Tune 220mm | Tool free LSC | Fork for Surron Light bee X \u0026 more","description":"\u003ch1\u003eSirris F43 CMX 220mm Tool-Free LSC Fork | By Sirris Suspension | For Sur-Ron Light Bee X\u003c\/h1\u003e\n\u003ch2\u003eBuilt to Dominate Any Terrain, Any Time\u003c\/h2\u003e\n\u003cp\u003eAt REV Rides we see a lot of suspension upgrades come through the shop, but the \u003cstrong\u003eSirris F43 CMX Fork\u003c\/strong\u003e is in a completely different class. This fork was engineered specifically for high performance compact e-moto platforms like the \u003cstrong\u003eSur-Ron Light Bee X\u003c\/strong\u003e. It delivers full-size motocross performance in a compact chassis that is stronger, stiffer, and far more capable than stock suspension.\u003cbr\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/n4_QaBwQrRE?si=6srx8KQMC7FEOymB\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eThe F43 CMX pairs 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, incredible front end confidence, and the type of planted ride feel riders usually expect from full size race bikes. With \u003cstrong\u003e220mm of travel\u003c\/strong\u003e, tool-free compression adjustment, and race-grade materials throughout the fork, this setup completely transforms the way a Light Bee rides on rough terrain, jumps, or high-speed tracks.\u003c\/p\u003e\n\u003cp\u003eSirris started with their proven F43 race platform, then resized and lightened it specifically for compact electric motos. The longer \u003cstrong\u003e775mm chassis length\u003c\/strong\u003e, oversized stanchions, and billet clamps increase stiffness and stability while keeping weight balanced for aggressive riding. Everything about this fork was designed to reduce flex, increase durability, and maintain predictable performance even when riders start pushing these bikes to their limits.\u003cbr\u003e\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/asLmhX5057M?si=oWYpFwoy7WOTQbJ3\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003cbr\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 nicks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e7XXX-series hard anodized uppers\u003c\/strong\u003e maximize durability and structural strength\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e775mm extended fork length\u003c\/strong\u003e delivers a longer and more planted front end\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e220mm travel\u003c\/strong\u003e provides 20mm more travel than the stock Light Bee fork\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBillet aluminum triple clamps\u003c\/strong\u003e increase stiffness and reduce twisting under load\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e178mm fork spacing\u003c\/strong\u003e allows nearly unlimited tire choices for dirt or supermoto setups\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect mount stem compatibility\u003c\/strong\u003e for stronger cockpit integration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom ultra stiff chromoly axle\u003c\/strong\u003e improves steering precision and front end feel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotorcycle style top cap system\u003c\/strong\u003e for improved steering bearing tension control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaceable caliper brackets and wheel spacers\u003c\/strong\u003e allow for wheel or brake upgrades\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIt is not just about stiffness. The F43 CMX delivers real strength without compromise. The design focuses on balance, impact absorption, and long term durability so riders can push harder without losing front end confidence.\u003c\/p\u003e\n\u003ch3\u003eRace Grade CMX Closed Cartridge Damping\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the fork is Sirris’ \u003cstrong\u003eCMX tuned symmetrical closed cartridge damper\u003c\/strong\u003e. This system was built to deliver professional level damping performance in a compact e-moto platform. Separate oil circuits isolate lubrication and damping oil, allowing the fork to maintain consistent feel even under long aggressive riding sessions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCMX Compact Motocross Tune\u003c\/strong\u003e designed for aggressive riders and racing environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSymmetrical closed cartridge design\u003c\/strong\u003e provides 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 softens heavy impacts while preserving full travel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e7XXX-series internal components\u003c\/strong\u003e with hard anodizing to reduce wear\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium Daido bushings and NOK MX seals\u003c\/strong\u003e for smooth operation and long service life\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe CMX tune delivers a planted and predictable ride feel. Whether you are charging into rough terrain or pushing track speed, the fork remains stable, controlled, and endlessly tunable for rider preference.\u003c\/p\u003e\n\u003ch3\u003eTool-Free Compression Adjustment\u003c\/h3\u003e\n\u003cp\u003eThe F43 CMX introduces \u003cstrong\u003etool-free compression adjusters\u003c\/strong\u003e, allowing riders to quickly fine tune front end feel without needing a screwdriver. Nearly \u003cstrong\u003e30 clicks of external compression adjustment\u003c\/strong\u003e make it easy to dial in 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 motorcycle style top cap system are designed for \u003cstrong\u003edirect mount stems\u003c\/strong\u003e. This improves cockpit stiffness and helps maintain consistent steering bearing torque, similar to full-size motocross bikes.\u003c\/p\u003e\n\u003cp\u003eThe stock Sur-Ron Light Bee X stem is not compatible because the Sirris steerer tube cannot be clamped. Recommended options include a \u003cstrong\u003eWarp 9 direct mount stem\u003c\/strong\u003e or the \u003cstrong\u003eHeavy Hitter Adjustable Billet Display Mount from GritShift\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eOptional Drop Clamp for Big Wheel Builds\u003c\/h3\u003e\n\u003cp\u003eThe optional \u003cstrong\u003edrop crown clamp\u003c\/strong\u003e raises the front end an additional \u003cstrong\u003e25mm\u003c\/strong\u003e, extending overall fork length to approximately \u003cstrong\u003e800mm\u003c\/strong\u003e. This allows riders to run a \u003cstrong\u003e21 inch front wheel\u003c\/strong\u003e while maintaining proper bike balance when paired with longer rear suspension.\u003c\/p\u003e\n\u003ch3\u003eAxle and Brake Mount System\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUltra stiff chromoly race axle improves steering precision\u003c\/li\u003e\n\u003cli\u003eReplaceable brake caliper mount brackets allow caliper upgrades\u003c\/li\u003e\n\u003cli\u003e220mm rotor brake bracket included\u003c\/li\u003e\n\u003cli\u003eStock Light Bee X rotor is 200mm and must be upgraded to 220mm\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 ~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 III hard anodized\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrop Outs:\u003c\/strong\u003e 6061 aluminum, Type II anodized\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAxle:\u003c\/strong\u003e Ultra high tensile hard chromed race axle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriple Clamps:\u003c\/strong\u003e Billet 6061 aluminum, Type II anodized\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteer Tube:\u003c\/strong\u003e Seamless 7050 aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompression Adjustment:\u003c\/strong\u003e External tool free LSC adjuster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRebound:\u003c\/strong\u003e Dual side adjustable\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 polypropylene, 210° 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 \/ 3.2 springs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy:\u003c\/strong\u003e 180 to 220 lb rider weight, 3.6 \/ 3.6 springs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRider weights are calculated without riding gear. Approximately 15 pounds of riding gear is factored into the recommended range. Upgrades such as heavier batteries or controllers should 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 fully closed, back adjusters out according to factory recommendations\u003c\/li\u003e\n\u003cli\u003eRiders near a weight cutoff may adjust preload to fine tune sag\u003c\/li\u003e\n\u003cli\u003eAggressive riders may benefit from moving up one spring class with reduced preload\u003c\/li\u003e\n\u003cli\u003eRider preference and terrain may require further adjustment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eExample: A 160 lb rider with 20 lb of added upgrades would calculate rider weight as 180 lb. An aggressive rider would typically run the heavy tune with lower preload, while a relaxed rider could run the medium spring with higher preload.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSur-Ron Light Bee X \u0026amp; S\u003c\/li\u003e\n\u003cli\u003eSegway X160 \u0026amp; X260\u003c\/li\u003e\n\u003cli\u003eTalaria MX3 \u0026amp; MX4\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWho This Fork Is Perfect For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSur-Ron riders building a \u003cstrong\u003erace or track focused Light Bee\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eTrail riders who want \u003cstrong\u003eserious durability and front end confidence\u003c\/strong\u003e on rough terrain\u003c\/li\u003e\n\u003cli\u003eHigh power 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\"\u003e\n\u003cdiv class=\"rte\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\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":51503118024994,"sku":"430-99-019-MED-02,  43MM USD, 775MM X 220MM, 25MM OFFSET, SURRON LBX, MED, BLACK","price":2250.0,"currency_code":"USD","in_stock":true},{"title":"Medium (140-180 lb) \/ CMX - Standard Clamp \/ Blue","offer_id":51503118057762,"sku":"430-99-019-MED-04,  43MM USD, 775MM X 220MM, 25MM OFFSET, SURRON LBX, MED, BLUE","price":2250.0,"currency_code":"USD","in_stock":true},{"title":"Medium (140-180 lb) \/ CMX - Drop Clamp \/ Black","offer_id":51503118090530,"sku":"430-99-019-MED-02-DR,  43MM USD, 775MM X 220MM, 25MM OFFSET, SURRON LBX, MED, BLACK, DROP CLAMP","price":2350.0,"currency_code":"USD","in_stock":true},{"title":"Heavy (180-220 lb) \/ CMX - Standard Clamp \/ Black","offer_id":51503118123298,"sku":"430-99-019-HVY-02,  43MM USD, 775MM X 220MM, 25MM OFFSET, SURRON LBX, HVY, BLACK","price":2250.0,"currency_code":"USD","in_stock":true},{"title":"Heavy (180-220 lb) \/ CMX - Standard Clamp \/ Blue","offer_id":51503118156066,"sku":"430-99-019-HVY-04,  43MM USD, 775MM X 220MM, 25MM OFFSET, SURRON LBX, HVY, BLUE","price":2250.0,"currency_code":"USD","in_stock":true},{"title":"Heavy (180-220 lb) \/ CMX - Drop Clamp \/ Black","offer_id":51503118188834,"sku":"430-99-019-HVY-02-DR,  43MM USD, 775MM X 220MM, 25MM OFFSET, SURRON LBX, 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-SURRON-LBX-suspension-fork-front-CMX-black_815b5de4-fb54-4d73-8361-2f659f586ced.jpg?v=1775673774","url":"https:\/\/revrides.com\/products\/f43-cmx-tune-tool-free-lsc-220-mm-travel-surron-light-bee-x","provider":"REVRides","version":"1.0","type":"link"}