{"product_id":"f43-mx-tune-lsc-246-mm-travel","title":"Sirris F43 Fork | MX Tune | Surron Ultra Bee","description":"\u003ch1 style=\"text-align: center;\" data-start=\"322\" data-end=\"366\"\u003eSurron Ultra Bee\u003c\/h1\u003e\n\u003ch1 style=\"text-align: center;\" data-start=\"322\" data-end=\"366\"\u003eF43 MX Tune Fork | LSC | 246mm Travel\u003c\/h1\u003e\n\u003cp data-end=\"632\" data-start=\"274\"\u003eThe \u003cstrong data-end=\"310\" data-start=\"278\"\u003eSirris F43 Fork with MX Tune\u003c\/strong\u003e is built for one thing—\u003cstrong data-end=\"358\" data-start=\"334\"\u003emotocross domination\u003c\/strong\u003e. If your Ultra Bee spends more time in the air than on the ground, this is your setup. With firm suspension dialed for balance, control, and serious bottoming resistance, it’s the go-to fork for riders hitting big jumps, blasting whoops, and railing corners at top speed.\u003c\/p\u003e\n\u003cp data-end=\"760\" data-start=\"634\"\u003eTrade a bit of trail plushness for pure motocross performance—and gain the confidence to send it harder, faster, and higher.\u003c\/p\u003e\n\u003cp data-end=\"760\" data-start=\"634\"\u003eWant the complete set up - pair with the \u003ca href=\"https:\/\/electrixmotoco.com\/products\/r46-mx-tune-lsc?_pos=1\u0026amp;_psq=r46+shock\u0026amp;_ss=e\u0026amp;_v=1.0\"\u003eR46 MX Shock\u003c\/a\u003e!\u003c\/p\u003e\n\u003chr data-end=\"765\" data-start=\"762\"\u003e\n\u003ch2 data-end=\"800\" data-start=\"767\"\u003eWhy Riders Choose MX Tune 🏁\u003c\/h2\u003e\n\u003cul data-end=\"1097\" data-start=\"801\"\u003e\n\u003cli data-end=\"879\" data-start=\"801\"\u003e\n\u003cp data-end=\"879\" data-start=\"803\"\u003e\u003cstrong data-end=\"833\" data-start=\"803\"\u003eMotocross-Specific Valving\u003c\/strong\u003e – Firm and supportive for aggressive riding\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"957\" data-start=\"880\"\u003e\n\u003cp data-end=\"957\" data-start=\"882\"\u003e\u003cstrong data-end=\"906\" data-start=\"882\"\u003eBottoming Resistance\u003c\/strong\u003e – Built to handle huge jumps and gnarly landings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1027\" data-start=\"958\"\u003e\n\u003cp data-end=\"1027\" data-start=\"960\"\u003e\u003cstrong data-end=\"982\" data-start=\"960\"\u003eRace-Ready Control\u003c\/strong\u003e – Stable through whoops and fast cornering\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1097\" data-start=\"1028\"\u003e\n\u003cp data-end=\"1097\" data-start=\"1030\"\u003e\u003cstrong data-end=\"1059\" data-start=\"1030\"\u003eProven E-Moto Performance\u003c\/strong\u003e – Designed for the Surron Ultra Bee\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1102\" data-start=\"1099\"\u003e\n\u003ch2 data-end=\"1132\" data-start=\"1104\"\u003eRider Weight Options ⚡️\u003c\/h2\u003e\n\u003cp data-end=\"1222\" data-start=\"1133\"\u003eChoose the right spring rates (weights listed without gear—add 15 lbs for riding gear):\u003c\/p\u003e\n\u003cul data-end=\"1439\" data-start=\"1224\"\u003e\n\u003cli data-end=\"1265\" data-start=\"1224\"\u003e\n\u003cp data-end=\"1265\" data-start=\"1226\"\u003e120–160 lbs → Light (4.4\/4.4 springs)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1308\" data-start=\"1266\"\u003e\n\u003cp data-end=\"1308\" data-start=\"1268\"\u003e160–200 lbs → Medium (5.0\/4.8 springs)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1350\" data-start=\"1309\"\u003e\n\u003cp data-end=\"1350\" data-start=\"1311\"\u003e200–240 lbs → Heavy (5.4\/5.0 springs)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1394\" data-start=\"1351\"\u003e\n\u003cp data-end=\"1394\" data-start=\"1353\"\u003e240–280 lbs → X Heavy (5.4\/5.4 springs)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1439\" data-start=\"1395\"\u003e\n\u003cp data-end=\"1439\" data-start=\"1397\"\u003e280–320 lbs → XX Heavy (5.4\/5.4 springs)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\" class=\"majortitle in-content h1\"\u003eTUNING DETAILS \u0026amp; RIDER WEIGHT RANGE\u003c\/h2\u003e\n\u003cdiv class=\"rte lightly-spaced-row large-text\"\u003e\n\u003cp style=\"text-align: center;\"\u003eListed weight ranges are body weight without riding gear (15 pounds of riding gear is calculated into the weight ranges).\u2028\u003cbr\u003eWeights of upgrades (battery, controller, etc) need to be added to rider weight.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0588\/2521\/1979\/files\/tuning-details-mxtune_828c3e3c-f79a-45ac-8b79-1b9d10911837.webp?v=1756738773\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0588\/2521\/1979\/files\/tune-chart-3_f6b62455-a9a4-442f-a70b-1c8541eecf56.webp?v=1756737067\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eMX Tune Starting point notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAssuming neutral riding position, and 15 lbs gear\u003c\/li\u003e\n\u003cli\u003eWeights of upgrades (battery, controller, etc) to be added to rider weight\u003c\/li\u003e\n\u003cli\u003eStock bike with 18\/21 wheels\u003c\/li\u003e\n\u003cli\u003eRiders close to a weight cut off need to adjust preload to compensate\u003c\/li\u003e\n\u003cli\u003eVery aggressive\/pro riders to consider +1 weight class and drop preload to get sag. Especially if in the upper range.\u003c\/li\u003e\n\u003cli\u003eRider preference and riding conditions may require a different setup\u003c\/li\u003e\n\u003cli\u003eXX Hvy same spring rates as X Hvy due to maxed out rear spring rate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eExample:\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e180 lb rider without riding gear, 20 additional lbs with upgraded controller\/battery\u003c\/li\u003e\n\u003cli\u003eWeight calculation 180+20=200\u003c\/li\u003e\n\u003cli\u003eAggressive rider = Heavy tune with low preload\u003c\/li\u003e\n\u003cli\u003eRelaxed rider = Medium tune with high preload\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSETTINGS NOTE:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eSettings are number of clicks from the closed position (full clockwise). Once they are in the closed position, back them out (counter-clockwise) according to the number of clicks indicated in the chart above to get you to factory settings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e*OIL NOTE:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eSirris uses Shell Tellus S2 VX15 (5wt) in the fork cartridge and Shell Tellus S2 VX68 (20wt) as the bath oil. These are cross compatible with other high quality 5wt and 20wt suspension fluids.  Sirris uses a semi-synthetic 2.5wt oil in the shock that is also compatible with other high quality 2.5wt aftermarket suspension fluids. You can use 5wt\/20wt oils of your preference, Lubefinder.com can be used to source the fork oils. KYB K2C can be used in the shock and has wide availability.\u003c\/p\u003e\n\u003ch2 data-end=\"274\" data-start=\"237\" style=\"text-align: left;\"\u003eWhich Tune Should You Choose? 🤔\u003c\/h2\u003e\n\u003cp data-end=\"432\" data-start=\"276\" style=\"text-align: left;\"\u003e\u003cstrong data-end=\"290\" data-start=\"276\"\u003eTrail Tune\u003c\/strong\u003e\u003cbr data-end=\"293\" data-start=\"290\"\u003e👉 Best for all-around riding. Sporty, supportive, and versatile. Plush enough for rough terrain, firm enough for g-outs and small jumps.\u003c\/p\u003e\n\u003cp data-end=\"585\" data-start=\"434\" style=\"text-align: left;\"\u003e\u003cstrong data-end=\"445\" data-start=\"434\"\u003eMX Tune\u003c\/strong\u003e\u003cbr data-end=\"448\" data-start=\"445\"\u003e👉 Motocross focused. Firm suspension built for speed, whoops, and big landings. Maximum control and bottoming resistance at race pace.\u003c\/p\u003e\n\u003cp data-end=\"775\" data-start=\"587\" style=\"text-align: left;\"\u003e\u003cstrong data-end=\"598\" data-start=\"587\"\u003eSX Tune\u003c\/strong\u003e\u003cbr data-end=\"601\" data-start=\"598\"\u003e👉 Pro-only. The stiffest setup in the lineup, developed with Josh Hill for the biggest hits and hardest landings. If you’re not racing at a pro level, it’ll feel too firm.\u003c\/p\u003e\n\u003chr data-end=\"780\" data-start=\"777\"\u003e\n\u003cp data-end=\"802\" data-start=\"782\" style=\"text-align: left;\"\u003e⚡ \u003cstrong data-end=\"800\" data-start=\"784\"\u003eSimple Rule:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"914\" data-start=\"803\"\u003e\n\u003cli data-end=\"842\" data-start=\"803\" style=\"text-align: left;\"\u003e\n\u003cp data-end=\"842\" data-start=\"805\"\u003eTrail = Versatile everyday shredder\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"878\" data-start=\"843\" style=\"text-align: left;\"\u003e\n\u003cp data-end=\"878\" data-start=\"845\"\u003eMX = Track and moto performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"914\" data-start=\"879\"\u003e\n\u003cp data-end=\"914\" data-start=\"881\" style=\"text-align: left;\"\u003eSX = Beast mode (for pros only)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMX Tune is a motocross specific tune with balance, control, and bottoming resistance for the fastest speeds. It's firm suspension for maximum control and support for huge jumps, whoops and fast cornering. If you select the EBMX or MX spec, you’ll compromise a bit of trail plushness for improved bottoming resistance.\u003cspan\u003e\u003cspan style=\"color: rgb(34, 210, 226);\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan style=\"color: rgb(34, 210, 226);\"\u003e\u003cstrong\u003eFORK SPECS:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eArchitecture\u003c\/strong\u003e\u003cbr\u003eUpside down fork\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTravel\u003c\/strong\u003e\u003cbr\u003e246 mm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFree length\u003c\/strong\u003e\u003cbr\u003e856 mm\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFork weight, includes clamps and steerer\u003c\/strong\u003e\u003cbr\u003e22 lbs \/ 10kg\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStanchions\u003c\/strong\u003e\u003cbr\u003eØ43, high tensile steel with hard chrome\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOuter tubes\u003c\/strong\u003e\u003cbr\u003eSeamless 7050 aluminum, type 3 hard anodized coating\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDrop outs\u003c\/strong\u003e\u003cbr\u003eForged 6061 aluminum, type 3 hard anodized coating\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTriple clamps\u003c\/strong\u003e\u003cbr\u003eForged 6061 aluminum, type 3 hard anodized coating\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSteer tube\u003c\/strong\u003e \u003cbr\u003eSeamless 7050 aluminum, type 2 anodized coating\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDamping\u003c\/strong\u003e\u003cbr\u003eSymmetrical, adjustable closed cartridge with spring backed IFP\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDamper bodies\u003c\/strong\u003e\u003cbr\u003eSeamless 7050 aluminum, type 3 hard anodized coating\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRebound\u003c\/strong\u003e\u003cbr\u003eDual side high tensile steel spring, adjustable\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdjusters\u003c\/strong\u003e\u003cbr\u003eExternal compression and rebound adjustment\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSeals\u003c\/strong\u003e\u003cbr\u003eNBR \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGuards\u003c\/strong\u003e\u003cbr\u003eHigh impact PP, 210-degree wraparound\u003c\/p\u003e","brand":"Sirris","offers":[{"title":"Light (120-160 lb) \/ MX \/ LSC","offer_id":42290985631819,"sku":"430-99-007-LTE-XX   43MM USD, 856MM X 246MM, 25MM OFFSET, MX, LTE","price":2250.0,"currency_code":"USD","in_stock":true},{"title":"Medium (160-200 lb) \/ MX \/ LSC","offer_id":42290985664587,"sku":"430-99-007-MED-XX  43MM USD, 856MM X 246MM, 25MM OFFSET, MX, MED","price":2250.0,"currency_code":"USD","in_stock":true},{"title":"Heavy (200-240 lb) \/ MX \/ LSC","offer_id":42290985697355,"sku":"430-99-007-HVY-XX  43MM USD, 856MM X 246MM, 25MM OFFSET, MX, HVY","price":2250.0,"currency_code":"USD","in_stock":true},{"title":"X Heavy (240-280 lb) \/ MX \/ LSC","offer_id":42290985730123,"sku":"430-99-007-1XH-XX   43MM USD, 856MM X 246MM, 25MM OFFSET, MX, 1XH","price":2250.0,"currency_code":"USD","in_stock":true},{"title":"XX Heavy (280-320 lb) \/ MX \/ LSC","offer_id":42290985762891,"sku":"430-99-007-2XH-XX   43MM USD, 856MM X 246MM, 25MM OFFSET, MX, 2XH","price":2250.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0588\/2521\/1979\/files\/sirris-F43-suspension-fork-front-mx_d7c00f2a-8023-458d-bc66-301550a3bd0a.jpg?v=1775572939","url":"https:\/\/electrixmotoco.com\/products\/f43-mx-tune-lsc-246-mm-travel","provider":"Electrix Moto","version":"1.0","type":"link"}