🏁 SIRRIS F43 MX TUNE | 246 MM TRAVEL | Sur Ron Ultra Bee ⚡

A motocross specific tune built for balance, control and bottoming resistance at the fastest speeds 🔥

The F43 MX Tune is firm suspension for maximum control and support over huge jumps, deep whoops and fast cornering. If you spend your time on a real MX track and you are tired of your front end folding under you on the landing, this is the tune you want.

Same 246 mm of travel as the Trail Tune but with a stiffer, race focused valving package and dual oil circuits for consistent damping when the pace goes up. True upside down moto architecture with a symmetrical closed cartridge damper, built specifically for the Sur Ron Ultra Bee.

⚙️ Key Specifications

• 📏 Travel: 246 mm
• 📐 Free Length: 856 mm
• ⚖️ Weight: 22 lbs / 10 kg (includes clamps and steerer)
• 🏗️ Architecture: Upside down fork with true symmetrical closed cartridge
• 🔩 Stanchions: Ø43 mm high tensile steel with hard chrome
• 🛡️ Outer Tubes: Seamless 7050 aluminium, type 3 hard anodised
• 🔧 Drop Outs: Forged 6061 aluminium, type 3 hard anodised
• 🎯 Triple Clamps: Billet 6061 aluminium, type 2 anodised
• 🗜️ Steerer Tube: 7050 aluminium, type 2 anodised
• 💧 Damping: Symmetrical adjustable closed cartridge with dual oil circuits
• 🎛️ Adjusters: External LSC (low speed compression) and rebound adjustment
• 🔄 Rebound: Dual side high tensile steel spring, adjustable
• 🧴 Seals: NBR
• 🛡️ Guards: High impact PP, 210 degree wraparound
• 🏁 Tune: MX (motocross specific)

🏋️ Rider Weight Ranges

The F43 MX Tune is supplied in five spring rate options so the fork is set up correctly for your weight straight out of the box. Listed weights are rider weight without riding gear.

• 🟢 Light: 120 to 160 lbs
• 🔵 Medium: 160 to 200 lbs
• 🟡 Heavy: 200 to 240 lbs
• 🟠 X Heavy: 240 to 280 lbs
• 🔴 XX Heavy: 280 to 320 lbs

📦 What's Included

• ✅ Pair of Sirris F43 MX Tune forks, 246 mm travel
• ✅ Billet 6061 triple clamps (top and bottom)
• ✅ 7050 aluminium steerer tube
• ✅ 210 degree wraparound fork guards
• ✅ Springs matched to your selected rider weight range
• ✅ Fitting hardware

🚀 Why Choose The F43 MX Tune?

• 🛬 Built for big landings. Firm, supportive damping that holds you up instead of diving through the stroke
• 🌊 Whoop control. Stays high in the travel and keeps the front end tracking straight at speed
• 🎯 Corner with confidence. Balanced support means you can commit to ruts and berms without the front tucking
• 💧 Dual oil circuits. Consistent damping performance moto after moto with no heat fade
• 🛠️ Tuned for your weight. Five spring options mean no expensive respring after purchase
• 🏆 Moto grade build quality. Hard chromed 43 mm stanchions and hard anodised 7050 tubes built to survive real race abuse

📉 Optional Lowering Kit

Select the Lowering Kit Installed option at checkout and the forks are supplied with the Sirris lowering kit professionally fitted before dispatch. Ideal for shorter riders or anyone chasing a lower centre of gravity.

⚠️ Important — Please Read Before Ordering

🛠️ Made to order. Every F43 is built and valved to your selected spring rate. These are not held as generic stock items.

⏱️ Build time: approximately 5 to 15 working days.

🚚 Shipping time: approximately 5 to 10 working days depending on destination.

📅 Total estimated lead time: approximately 2 to 5 weeks from order. These are estimates and are not guaranteed.

🚫 Once your build has entered production, the order is non cancellable and non refundable due to the bespoke spring rate, valving and labour involved. If a lowering kit is selected this also applies to the fitting labour.

💬 We will keep you updated at every stage, from build confirmation through to dispatch.

📮 Order Tracking & Updates

Full tracking is issued the moment your forks leave us. Once the parcel is with the courier, transit times are outside of our control and occasional courier delays can happen, particularly on international shipments. International customers may be responsible for any duties and taxes charged on import.

❓ Got Questions?

Not sure whether MX or Trail is right for you? Message us before you order. We ride these bikes and we set these forks up, so we will point you at the right spec rather than just take the sale 👊

Sirris F43 MX Tune. Built for riders who send it and land it ⚡🏁

Shop now at WGTracing.store 🔥