F43 MX Tune | LSC | 246 mm Travel
Light (120-160 lb) / MX / LSC
$2,250.00
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F43 MX Tune | LSC | 246 mm Travel
$2,250.00
- 🚲 Test ride it first — ride it in person at our Louisville shop before you buy
- 🔧 Assembled by our shop — built, tuned, and safety-checked before you pick it up
- 🛠️ One free maintenance check — included with every bike purchase, in your first year, done in-house by our shop
- 🏬 A real local shop — buy online, pick up ready to ride, and talk to people who ride and wrench
MX 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.
RIDER WEIGHT SPECS:
Sirris offers five weight ranges to choose from when selecting your MX Tune F43 fork. (Listed weight ranges are rider weight without riding gear on. 15 pounds of riding gear is calculated into the weight ranges)
120 lbs - 160 lbs (Light = 4.4/4.4 springs)
160 lbs - 200 lbs (Medium = 5.0/4.8 springs)
200 lbs - 240 lbs (Heavy = 5.4/5.0 springs)
240 lbs - 280 lbs (X Heavy = 5.4/5.4 springs)
280 lbs - 320 lbs (XX Heavy = 5.4/5.4 springs)
Fork spring rates listed above are left side/right side.
FORK SPECS:
Architecture
Upside down fork
Travel
246 mm
Free length
856 mm
Fork weight, includes clamps and steerer
22 lbs / 10kg
Stanchions
Ø43, high tensile steel with hard chrome
Outer tubes
Seamless 7050 aluminum, type 3 hard anodized coating
Drop outs
Forged 6061 aluminum, type 3 hard anodized coating
Triple clamps
Forged 6061 aluminum, type 3 hard anodized coating
Steer tube
Seamless 7050 aluminum, type 2 anodized coating
Damping
Symmetrical, adjustable closed cartridge with spring backed IFP
Damper bodies
Seamless 7050 aluminum, type 3 hard anodized coating
Rebound
Dual side high tensile steel spring, adjustable
Adjusters
External compression and rebound adjustment
Seals
NBR
Guards
High impact PP, 210-degree wraparound
Why buy it from E Kingzz
You can buy this same bike online, direct from the manufacturer. Here's what the website can't do: let you ride one first, hand you a bike that's already assembled and tuned, and be there in person when it needs service. We're a local shop in Louisville, NE — buy it here and your bike comes with a shop, not a shipping box.
- Test rides at the shop — walk in and ride the actual model
- Free assembly by our mechanics (Josh builds every bike we sell)
- One free maintenance check in your first year — service handled in-house, and we'll help you through any warranty claim
- Real advice on which model fits you — even if that points you to a different bike
Details
Pickup, delivery & shipping
Pickup (how most of our customers get their bikes): pick it up at our Louisville shop — assembled, tuned, and safety-checked, ready to ride. Before you leave, we check the fit, walk you through the controls and ride modes, and make any quick adjustments. We'll let you know when your bike is ready.
Local delivery: need it brought to you? We offer scheduled delivery anywhere within 50 miles of the shop for a flat $150 — per trip, not per bike. Your bike arrives assembled and ready to ride, and we'll do the same fit check and controls walkthrough at your door. Beyond 50 miles, ask us about shipping instead.
Shipping: outside the local area, we can ship most bikes. Bikes and trikes are oversized, so shipping is arranged case by case — larger models may go freight. Contact us before you order and we'll quote the cost and timing up front, and tell you exactly how the bike will arrive.
Exchanges (no returns)
All bike sales are final — we do not offer refunds. If you picked the wrong model, contact us promptly. We generally consider an exchange when the request is made within 7 days of purchase and the bike has under 10 miles on the odometer. Those are guidelines, not an automatic guarantee: every exchange is case-by-case.
Bring the bike back with its receipt, charger, keys, manuals, and all included accessories. After our shop inspects it, a bike that can be sold as new again may receive full credit toward a different model. Wear, miles, damage, or missing parts may reduce the exchange credit. We will confirm the decision and credit amount after inspection, before the exchange is completed. If we sent the wrong item or the bike is defective, that is on us and is handled under warranty instead.