A New Era in Electric Motocross Suspension
Electric dirt bikes are soaring in popularity, but until recently their suspension technology lagged behind traditional motocross bikes. Enter Sirris Suspension – a startup founded in 2023 with one bold mission: “Unlock the true potential of E-Motos – making fast, FASTER” . This emerging brand has quickly made a name for itself by delivering race-spec, pro-level suspension designed exclusively for electric motorcycles. From the nimble Surron Light Bee X to the mid-sized Ultra Bee and even full-size e-motos, Sirris promises to elevate them all with bespoke forks and shocks built for electric speed and torque.
What makes Sirris stand out is the pedigree of its team. The company was founded by a group of suspension experts with over 150+ years of combined experience in off-road suspension development . These engineers and tuners aren’t newcomers to high performance – many hail from industry giants like Fox and Öhlins, where they helped design championship-winning motorcycle and mountain bike suspension . Now, they’ve reunited under Sirris to apply that expertise to the unique demands of electric motocross. “The talented folks at Sirris bring decades of high-end suspension experience to the table… With backgrounds from Fox Suspension and Öhlins, this team is no stranger to premium powersports suspension” . In short, Sirris has race-winning DNA in its blood, and it shows in their products.
Crucially, Sirris isn’t just repackaging motorcycle forks or mountain bike shocks – they are engineering from the ground up for e-moto. Electric dirt bikes have different weight distribution, instant torque, and often heavier batteries than gas bikes, so suspension needs to be purpose-built. Sirris embraced this challenge, and the result is “a massive leap forward in suspension technology, specifically engineered for electric dirt bikes” . By focusing 100% on e-moto, Sirris aims to redefine what’s possible on electric two-wheel machines .
From Fox Factory Roots to E-Moto Revolution
Behind the shiny new Sirris forks and shocks is a compelling story. The company is rider-owned and performance-driven, headquartered in New Hampshire with R&D in the USA and manufacturing at their own facility in Taiwan. The founders are a tight-knit crew of friends and former colleagues who in the early 2000s all worked together on cutting-edge suspension projects. Over the last two decades, they went on to achieve “groundbreaking milestones and win world championships” for various brands . Now, with the electric dirt bike boom, they saw the perfect moment to reunite and form Sirris, bringing the band back together to focus on the next big thing in powersports .
Their philosophy is simple: no compromises. Sirris assembled “the world’s best team” and vows to “take no shortcuts”in delivering premium suspension for e-moto enthusiasts and racers . Every component is top-shelf – aerospace-grade aluminum, hard-chrome steel, high-flow internals – all chosen for maximum durability and performance in off-road abuse . For example, all fork cartridge bodies and outer tubes are hard-anodized 7000-series aluminum for high strength and scratch resistance . The attitude is race-first: Sirris prototyped and tested their designs extensively in real races before releasing them to the public, ensuring they can truly handle the speeds and hits electric bikes can deliver .
It’s also worth noting the enthusiasm from top riders who have joined forces with Sirris. Freeride mountain bike legend Cam Zink was so impressed that he became an official ambassador for Sirris, riding a Ultra Bee fitted with Sirris suspension and helping shape the products from a rider’s perspective . “I’m blown away… It handled amazingly… The SX tune, right out of the box, is perfect,” Zink said after pushing the Sirris setup to the limit . Likewise, former Supercross pro Josh Hill collaborated with Sirris to develop their stiffest “SX” (Supercross) suspension package, ensuring it meets the needs of riders hitting 50-foot jumps and big whoops . With such names on board – both MTB icons and MX racers– Sirris is bridging action sports communities and proving its gear at the highest levels. The company’s mantra of being “rider owned” isn’t just talk ; they truly ride what they build, and it shows in the results.
Meet the Sirris F43 Fork – Built to Dominate Electric MX
Sirris’s flagship F43 front fork (shown in the SX Tune) brings full-size motocross capability to compact e-motos. Developed with input from pro racers, this 43 mm inverted fork delivers elite control and big-hit confidence for bikes like the Surron Ultra Bee .
At the heart of Sirris’s lineup is the F43 fork – named for its beefy 43 mm diameter stanchions. This is a USD (upside-down) dual-crown fork that instantly upgrades any compatible e-moto’s front end. In fact, the team at Electric Cycle Rider called the Sirris F43 “a massive upgrade… completely transforming our Ultra Bee into one of, if not the, favorite bike in our stable” . So what makes the F43 so special?
For starters, the F43 is a true closed-cartridge spring fork, built with the same architecture you’d expect on a pro motocross bike. It features a dual sealed closed cartridge damper system that prevents oil foaming and fade, so the fork action stays consistent even after countless hard laps . Sirris designed it as a “true symmetrical” fork – meaning both legs have damping, unlike some mountain bike-derived forks – ensuring balanced loads and predictable handling at high speeds . The damping circuits include fully tunable compression and rebound valves, allowing suspension shops or advanced users to revalve and fine-tune as needed . For everyday adjustability, you get external clickers: tool-free low-speed compression adjusters on top of the fork (so you can dial it in quickly at the track) and a rebound adjuster (requires a tool) . In short, this fork is “endlessly tunable” to your preferences – whether you want it plush for trail comfort or cranked up for big air, the F43 can do it.
The construction of the F43 fork is equally impressive. The 43 mm stanchions are high-tensile steel with a hard-chrome finish, nearly immune to flex, nicks, or bending . The upper fork tubes (outer tubes) are made from seamless 7050-series aluminum that’s Type III hard-anodized – the same level of ruggedness you’d expect in aircraft parts . Massive billet aluminum triple clamps hold everything together, providing exceptional stiffness and clamping force on the forks; Sirris even offers these clamps in four colors (black, blue, red, gold) so riders can add some style . Every aspect is oversized and overbuilt for strength: from the extra-wide 178 mm fork spacing (to run fat tires off-road) to the ultra-stiff 25 mm chromoly axle that improves steering precision . The F43’s standard length provides about 246 mm of travel on bikes like the Ultra Bee – a bit more than stock – and Sirris even engineered a version with 260 mm travel for the SX package, giving more cushion for huge jumps . If needed, an optional “drop clamp” can extend the fork length further (to accommodate a 21″ front wheel on smaller bikes like the Light Bee) .
Despite all this moto-grade beefiness, the F43 remains relatively light – about 8.8 lbs per leg in standard trim – thanks to weight-optimized design and materials. Installation is also a breeze: the F43 is a plug-and-play swap for stock forks on bikes like the Surron, with Sirris ensuring the triple clamps, brake mounts, axle spacers, and even fender and display brackets line up with OEM parts . In other words, you don’t need to hack your bike to enjoy this upgrade; it’s a direct bolt-on that “requires no additional modifications” . Sirris even pre-installs the steering stem bearing on the fork’s steerer tube to make the upgrade quicker . This attention to detail underlines Sirris’s goal: deliver full-scale motocross performance in a package engineered for modern electric dirt bikes.
Perhaps the best way to sum up the F43 is the marketing tagline Sirris uses: “Ride it once. Regret everything else.” . That cheeky confidence is backed up by riders who’ve tried it. In testing, the F43’s hydraulic bump stop earned rave reviews for how it softens hard landings – giving you a cushion at the end of the stroke so even massive hits feel smooth . At the same time, the fork’s stiffness and precision dramatically improve front-end feel. “It’s razor-sharp when you push it, yet forgiving when you need it,” Sirris says of their tuning . For electric MX riders who have struggled with flexy or underdamped stock forks, the F43 is nothing short of confidence-inspiring. It’s no wonder that after upgrading to Sirris suspension, one reviewer declared, “this is the best Surron Ultra Bee that exists” .
The Sirris R46 Shock – Unleashing Traction and Control
The Sirris R46 rear shock (SX Tune version) brings a 46 mm piston and heavy-duty components to e-moto rear suspension. With fully tunable damping and spring rates for riders up to 300 lbs, the R46 shock ensures even high-powered electric bikes stay planted and in control .
Complementing the mighty F43 fork is Sirris’s R46 rear shock. While often less visible than forks, the shock is arguably even more crucial for putting down power and soaking up big landings – and Sirris didn’t skimp here. The R46 is named for its oversized 46 mm shock piston, which provides a large oil volume for consistent damping and the ability to handle huge impacts without fading . This shock is a piggyback reservoir design (for extra oil and cooling) and uses a high-tensile steel coil spring. Sirris offers a range of spring rates from 75 N/mm up to 115 N/mm to suit rider weight and bike setup . In fact, the R46 can accommodate riders up to 300 lbs (136 kg) by simply swapping to the appropriate spring – ensuring even heavier or dual-sport equipped e-bikes get the support they need .
One standout feature of the R46 shock is its extensive adjustability. It comes with both high-speed and low-speed compression damping adjusters, as well as a rebound adjuster . This means you can independently tune how the shock behaves on big hits (high-speed damping for jumps or rocks) versus smaller bumps and weight transfers (low-speed damping). Such multi-axis adjustment is a hallmark of premium motocross shocks, and it’s great to see it on an electric-specific unit. Riders can truly dial in the suspension to their liking – whether they want it plush for technical trails or stiff for a motocross track. “The R46 offers unparalleled customization, allowing for precise adjustments that optimize the bike’s performance across various terrains,” notes one review . In short, no matter your riding style, this shock can be tailored to match .
Durability and practicality were also priorities in the R46’s design. The shock body is built tough (Sirris uses hard-anodized aluminum and robust seals), recognizing that e-motos can produce sustained high loads. Even with its burly build, the R46 shock weighs only about 3.9 lbs (1.76 kg) plus the spring , keeping weight low. It’s designed as a direct swap for the stock rear shock on bikes like the Surron Ultra Bee, with the same 320 mm eye-to-eye length and around 84–85 mm stroke . Just like the fork, installing it is straightforward – no frame mods or special linkage required, it bolts right in .
On the trail, the R46 shock’s impact is immediately felt in terms of improved traction and bottom-out resistance. The increased damping control keeps the rear wheel planted over rough terrain, preventing that unsettling bounce or kick that lesser shocks can exhibit when overwhelmed. And when you send the bike off a jump or drop, the R46’s stiffer bottom-out bumper and precise damping prevent the dreaded hard bottoming sensation . Sirris even warns humorously that their ultra-firm SX shock setup is “not for you if you’re not hitting 50+ foot jumps” – a testament that this suspension can handle outright Supercross-level abuse. For most riders, the benefit will be newfound confidence: you can charge harder into whoops, carry more speed in the rough, and accelerate sooner out of corners because the bike stays composed. Cam Zink described the feeling best after testing Sirris’s shock and fork: “Smashing whoops… it felt really controlled. I wouldn’t want it any softer” . That balance of firmness with control is what high-performance suspension is all about.
Tuned for Every Ride: Trail, MX, SX and More
One size rarely fits all in suspension, and Sirris recognizes that e-moto riders span a spectrum from casual trail explorers to competitive racers. That’s why they offer the F43 fork and R46 shock in multiple tuning configurations – each optimized for a different style of riding. Rather than a generic setup, when you order Sirris suspension you choose a “tune” (and an appropriate spring rate) so the damping is spot-on for your needs right out of the box .
- Trail Tune: This is Sirris’s most versatile setup, aimed at aggressive trail riding and light enduro duty. The Trail tune is described as “sporty and supportive, designed for going fast over a wide variety of terrain” . It’s a bit firmer than a pure enduro or “hard enduro” setting, giving you solid bottoming resistance on g-outs and small jumps, yet it’s not as stiff as a full MX setup . In other words, plush when you need comfort, but with enough firmness to handle occasional air-time or high-speed hits. If your e-moto splits time between technical trails, fire roads, and maybe a dab of motocross, the Trail tune is the balanced choice.
- MX Tune: For riders who frequent motocross tracks, jump parks, or just ride flat-out, the MX tune is the ticket. This setting is “firm suspension for maximum control and support for huge jumps, whoops and fast cornering” . It’s a true motocross-specific valving that prioritizes big impact absorption and stability at speed. Expect a noticeably stiffer ride on small bumps (compared to Trail tune), but in exchange you get superior bottom-out resistance and hold-up in the stroke. As Sirris notes, choosing the MX (or its sibling EBMX) tune means “you’ll compromise a bit of trail plushness for improved bottoming resistance” – a trade-off any MX racer will happily accept. If bar-to-bar racing or big jumps are your passion, the MX tune delivers the confidence to go harder and land bigger.
- SX Tune: The SX tune represents the extreme end of the spectrum, developed in collaboration with pro rider Josh Hill for Supercross-level performance . Available on the highest-end F43/R46 kits, the SX package takes the MX concept and turns it up to 11. The F43 SX fork gets extended to 260 mm travel (for extra cushion), special billet clamps and dropouts for the Surron Ultra Bee, plus firmer damping and a reinforced bottom-out system . The R46 SX shock likewise is built as stiff as sensible, with a heavy spring and firm compression damping . The result is a setup “built for those who ride fast, race hard, and demand the absolute best” . It’s literally intended for clearing huge Supercross triples and blitzing whoop sections. For 99% of riders, the MX tune is already plenty – but if you’re an elite racer or just someone who truly pushes the limit on your electric moto, the SX tune ensures the suspension won’t be the limiting factor. As Sirris bluntly puts it, “If you’re not hitting 50+ foot jumps, [the SX tune] is not for you” !
- EBMX Tune: Interesting in name, the EBMX tune was co-developed with the team at EBMX (a well-known electric bike performance company) to cater to heavily modified bikes. Many riders add bigger batteries, motors, or controllers to bikes like the Surron – boosting power but also weight. The EBMX tune accounts for this by using the longer 260 mm fork travel and a damping setup “intended for a mix of light moto and aggressive trail” . It sits between Trail and MX in firmness (rated around 7/10 on Sirris’s scale) . The fork valving is firmer than Trail for better bottoming control, and the shock comes with a stiffer spring to handle the increased bike weight and power delivery of souped-up electric builds . In essence, EBMX tune is for the hot-rodded e-motos – think of it as the “muscle e-bike” suspension setting.
Additionally, Sirris has even crafted a CMX Tune (Compact Motocross) specifically for smaller bikes like the Surron Light Bee X and Talaria. The CMX tune is essentially a miniaturized MX setup for these light electric pit bikes, giving them true race capability despite their size . On the Light Bee, for example, Sirris’s CMX fork offers 220 mm travel (about 20 mm over stock) and an incredibly stout build, which the company unabashedly markets as “the world’s best compact e-moto fork. Period.” . Early adopters seem to agree – once you feel a Light Bee with a Sirris fork, you’ll find the stock suspension utterly lacking.
The key takeaway is that Sirris covers the full range of e-moto riding styles. Whether you’re a woods rider craving comfort or an airtime junkie chasing the podium, you can get a fork and shock tuned for the task. This level of customization straight from the factory is something usually only found in high-end motorsports. It underscores how serious Sirris is about making electric motorcycle suspension as good – or better – than anything out there on gas bikes.
Real-World Results: Race Wins and Rave Reviews
All the technology and tuning in the world means little if it doesn’t translate to performance on the ground. Fortunately, Sirris’s early track record speaks volumes. Perhaps the most eye-opening proof came from the 2025 Mint 400, a notoriously brutal 120-mile desert race. Two teams entered experimental electric bikes (the Altis Sigma and Arctic Leopard EX 800) outfitted with prototype Sirris F43 forks – and made history by not only finishing, but taking 1st and 2nd place in the eMoto class . Conquering the Mint 400 on e-bikes was previously unthinkable, but Sirris suspension helped these riders do it and even stand on top of the podium . The Sirris team worked closely with CRC Motorsports on that project, even fast-tracking custom 230 mm travel forks in a development cycle of mere weeks . It was a dramatic demonstration of engineering prowess and commitment – “an industry-leading timeline that would be nearly impossible for any other suspension company”, Sirris noted of their rapid prototyping feat .
Not long after, Sirris components were again under the spotlight at the Biltwell 100 desert race. In that event, electric bikes equipped with Sirris suspension finished 1–2 as well, clinching another victory in the desert. These early wins suggest that Sirris isn’t just making bold claims – their suspension is quite literally winning races and proving itself in some of the toughest conditions imaginable (deep sand whoops, high-speed runs, and big drops).
Beyond racing, Sirris has been earning praise from riders in all disciplines. We’ve already mentioned Cam Zink’s glowing review of the Supercross-tuned setup (“supercross suspension… handled amazingly… perfect” ). Other freestyle and freeride riders from the mountain bike world – like Jaxson Riddle and Reed Boggs – have also started charging e-motos fitted with Sirris suspension . It’s telling that athletes known for huge aerial tricks and hard landings are trusting Sirris on their electric bikes; they’re notoriously picky about suspension performance. Even in the recreational scene, everyday riders report that upgrading to Sirris forks and shocks transforms their bikes’ handling. The consensus is that stock suspension on popular e-motos (Surron, Talaria, etc.) is a weak link, and that Sirris finally gives these machines the high-end damping and support they deserve. As one Ultra Bee owner put it, with Sirris components installed “it’s a whole new world… it unlocks the bike’s full potential” .
It’s also exciting to see new electric bike manufacturers partnering with Sirris from the get-go. For instance, upcoming high-performance e-dirt bikes like the Bonnell 805 and 902 (launching in 2025) have chosen to equip Sirris F43 forks and R46 shocks as standard . The Bonnell 902 boasts a massive 285 mm of suspension travel front and rear via custom Sirris units – indicating that Sirris can design solutions for larger, more powerful e-motos as well . This OEM adoption is a strong endorsement of Sirris’s technology and reliability. It’s not just an aftermarket upgrade now; it’s becoming the suspension of choice for the “next generation of e-moto” brands .
From local motocross tracks in California to backcountry singletrack in Colorado, Sirris Suspension is rapidly gaining a reputation as the go-to for serious electric motorcycle riders. Dealers are beginning to stock Sirris alongside names like FOX, WP, and Öhlins – a sign of the credibility it’s earned. For Australian readers (such as those at Ampd Bros), this is especially intriguing as bikes like the Surron Light Bee, Ultra Bee, Talaria Sting, Ventus One+, and even the new Zero XB are making waves Down Under. These lightweight electric dirt bikes deliver incredible fun, but only truly come alive when the suspension can keep pace. Sirris finally offers a turnkey way to get motorcycle-caliber suspension on these machines, allowing riders to hit jumps, whoops, and rough terrain with confidence. It effectively bridges the gap between mountain bike and motocross suspension – exactly what many e-moto enthusiasts have been waiting for.
Conclusion: Making Fast Faster – Sirris Sets the Bar High
So, is Sirris the world’s best e-moto suspension? If you ask the growing legion of riders and racers who’ve tried it, the answer is a resounding yes – or at least, that it’s in a league of its own at the moment. By bringing together a “dream team” of suspension experts and focusing purely on electric motorcycles, Sirris has leaped ahead with innovation where larger companies have been playing catch-up. In just a short time, they’ve delivered a fork and shock package that can transform a stock e-dirt bike into a race-ready machine , with handling and stability formerly reserved for full-sized motocross bikes.
Crucially, Sirris Suspension isn’t only about outright racing – it’s about enhancing every ride. The components are designed to be as comfortable and compliant on an all-day trail adventure as they are precise and controlled on a track day. That balance of speed, comfort, and control is exactly what electric motocross needed . And with multiple tuning options (Trail, MX, SX, etc.), Sirris meets riders where they are, rather than forcing a one-size-fits-all approach.
In the end, Sirris’s tagline “Make fast faster” feels completely earned . They took bikes that were already quick – Surrons, Talarias, and others – and gave them the suspension to carry much more speed with confidence. For the motorcycle MX demographic eyeing the electric shift, Sirris suspension answers the crucial question: Can an electric dirt bike really handle like my gas MX bike? Ride a Sirris-equipped e-moto, and you’ll likely say yes – if not declare it even better in some cases.
Is this the world’s best e-moto suspension? It very well might be. At the very least, it’s safe to say Sirris has set a new benchmark. As electric motorcycles continue to evolve in power and capability, it’s reassuring to know the suspension is keeping pace, if not outright leading the way. For those ready to take their electric ride to the next level, Sirris Suspension offers a proven, no-compromise solution – one that can truly unlock the potential of these machines and usher in a new era of electric off-road performance.
Sources:
- Sirris Inc. – Company Background and Mission
- Electric Cycle Rider – “Sirris Suspension: The Next Evolution in eMoto Performance” (T. Neary, Aug 2024)
- Sirris Official Site – F43 Fork and R46 Shock Technical Details
- Sirris Official Site – Tuning Options (Trail, MX, SX, EBMX)
- Sirris Official News – Cam Zink Partnership & Rider Testimonials
- Sirris Official News – Race Wins (Mint 400, Biltwell 100)
