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SIRRIS F43 CMX Tune | Front Fork
SIRRIS F43 CMX Tune | Front Fork
SIRRIS F43 CMX Tune | Front Fork
SIRRIS F43 CMX Tune | Front Fork
SIRRIS F43 CMX Tune | Front Fork
SIRRIS F43 CMX Tune | Front Fork
SIRRIS F43 CMX Tune | Front Fork
SIRRIS F43 CMX Tune | Front Fork
SIRRIS F43 CMX Tune | Front Fork
SIRRIS F43 CMX Tune | Front Fork
SIRRIS F43 CMX Tune | Front Fork
SIRRIS F43 CMX Tune | Front Fork

SIRRIS F43 CMX Tune | Front Fork

$2,250.00
**Default CMX Tuned Forks are for SurRon LBX-Standard Clamp | Call to order for other bike fitment/clamp and rider weight** : Medium (140-180lb) | CMX - Standard Clamp
  • Medium (140-180lb) | CMX - Standard Clamp
  • Heavy (180-220lb) | CMX - Standard Clamp

THE WORLD’S BEST COMPACT
E-MOTO FORK. PERIOD.

An oversized, race-built F43 chassis paired with our CMX-tuned closed cartridge damper — built for elite control, razor-sharp handling, and unreal front-end confidence. This is the strongest, most durable, highest-performance fork available.

You need to ride it to believe it.
It’s that good.

Can be configured for the following Bike Fitment: Default CMX Tuned Forks are for SurRon LBX-Standard Clamp | Call to order for other bike fitment/clamp and rider weight

  • SurRon LBX
  • ERide Pro SR
  • ERide Pro SS 2.0
  • ERide Pro SS 3.0
  • ERide Pro SR
  • Talaria MX4
  • Talaria MX5
  • Ventura ONE+

SPRING RATE CHART:

Sirris offers two weight ranges when selecting your CMX Tune F43 fork (Listed weight ranges are rider weight without riding gear on. 15 pounds of riding gear is calculated into the weight ranges)

140 lbs - 180 lbs  (Medium)
180 lbs - 220 lbs  (Heavy)

FORK SPECS:
Architecture

Upside down fork

Travel

220 mm

Free length

775 mm
(drop clamp option adds another 25mm of extended length)

Fork Spacing

178 mm - allows for unlimited tire choice (dirt or street)

Fork weight

4 kg per leg (driven by sturdy construction required for the forces and speeds encountered when pushing these bikes to their limits without compromising performance)

Stanchions

Ø43, high tensile steel with hard chrome)

Outer tubes

Seamless 7050 aluminum, type 3 hard anodized coating

Drop outs

6061 aluminum, type 2 anodized coating
Replaceable caliper mount brackets allow for caliper and wheel upgrades

Brake mounting
Rotor fitment: LBX comes stock with a 200mm rotor which will need to be upgraded to 220mm

• Sized for 220mm rotors, replaceable caliper mount brackets allow for caliper and wheel upgrades
• 220mm rotor brake bracket is included

Axle

• Custom ultra stiff, race-grade ultra-high tensile hard chromed axle increases steering precision and confidence
• Surron LBX wheel spacers included

Triple clamps

Billet 6061 aluminum, type 2 anodized coating, 2 color options (blue, black)
Optional drop clamp allows for 21” front wheel conversion (black only)

Steer tube

Seamless 7050 aluminum, type 2 anodized coating

Stem mount

4-bolt direct mount stem only
Stem fitment: The stock LBX stem is not compatible because the Sirris steerer tube cannot be clamped. We recommend Warp9 or the “Heavy Hitter Adjustable Billet Display Mount” from Gritshift.

Top cap system

Motorcycle-style top cap allows for more consistent control over steering bearing tension

Damping

• CMX tune (Compact Motocross Tune)
• Symmetrical and adjustable closed cartridge with spring backed modified IFP
• High-flow pistons + fully tunable compression and rebound valving
• Dual oil circuits for optimum performance. Separating lubrication and damping oils allows us to further optimize high and low speed damping performance.
• Balanced load, race-ready, high performance. No matter how hard you ride or how many laps you take, our closed cartridge forks will never fade and will always feel predictable.
• Hydraulic bump stop is a hydraulic bottom out control system that gives you soft landings and max stroke even on the most aggressive impacts.

Damper bodies

Seamless 7050 aluminum, type 3 hard anodized coating providing high durability and scratch resistance to keep your ride in top condition.

Rebound

Dual side high tensile steel spring, adjustable

Adjusters

External tool-free compression, rebound adjustment
(rebound adjusted using tool)

Seals

NOK MX seals

Bushings

Daido MX bushings

Guards

High impact PP, 210-degree wraparound

OWNER'S GUIDE:

SIRRIS | CMX F43

TUNING DETAILS & RIDER WEIGHT RANGE

Listed weight ranges are body weight without riding gear (15 pounds of riding gear is calculated into the weight ranges).

Weights of upgrades (battery, controller, etc) need to be added to rider weight.

SIRRIS Warranty

LIMITED WARRANTY INFO

Your Sirris fork and shock are warrantied against manufacturing defects for a period of 2 years. Normal wear and regular maintenance are not covered.

Sirris makes the following LIMITED WARRANTY with respect to its suspension products:

LIMITED TWO (2) YEAR WARRANTY ON SUSPENSION PRODUCTS

Subject to the limitations, terms and conditions hereof, Sirris warrants, to the original retail owner (consumer) of each new Sirris suspension product, that the Sirris suspension product, when new, is free from defects in materials and workmanship. This limited warranty expires two (2) years from the date of the original Sirris suspension product retail purchase from an authorized Sirris dealer or from a Sirris authorized Original Equipment Manufacturer where Sirris suspension is included as original equipment on a purchased vehicle.

TERMS OF WARRANTY

This limited warranty is conditioned on the Sirris suspension product being operated under normal conditions and properly maintained as specified by Sirris. This limited warranty is only applicable to Sirris suspension purchased new from an authorized Sirris source and is made only to the original retail owner (consumer) of the new Sirris suspension product and is not transferable to subsequent owners.

Should it be determined, by Sirris in its sole and final discretion, that a Sirris suspension product is covered by this limited warranty, it will be repaired or replaced, by a comparable model, at Sirris’s sole option, which will be conclusive and binding. THIS IS THE EXCLUSIVE REMEDY UNDER THIS LIMITED WARRANTY. ANY AND ALL OTHER REMEDIES AND DAMAGES THAT MAY OTHERWISE BE APPLICABLE UNDER THIS LIMITED WARRANTY ARE EXCLUDED, INCLUDING, BUT NOT LIMITED TO, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR PUNITIVE DAMAGES.

This limited warranty does not apply to normal wear and tear, malfunctions or failures that result from abuse, neglect, improper assembly, alteration or modification, improper or unauthorized repair or maintenance, crash, accident or collision, or other abnormal, excessive or improper use.

THIS IS THE ONLY WARRANTY MADE BY SIRRIS ON ITS SUSPENSION PRODUCTS AND COMPONENTS, AND THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION HEREIN. ANY WARRANTIES THAT MAY OTHERWISE BE IMPLIED BY LAW INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXCLUDED.

For questions regarding this warranty or Sirris products please email info@ridesirris.com, or visiting www.ridesirris.com.

When making a claim under this Limited Warranty you will be required to provide to an authorized Sirris Service Center:

1. The Product (or the affected part) and

2. A copy of the original proof of purchase, which clearly indicates the name and address of the seller, the date and place of purchase, the product part number and if utilized, a serial number. If Sirris products are sold as part of a complete motorcycle, the motorcycle brand, model, model year, and serial number should be included.

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SIRRIS F43 CMX Tune | Front Fork
SIRRIS F43 CMX Tune | Front Fork
SIRRIS F43 CMX Tune | Front Fork
SIRRIS F43 CMX Tune | Front Fork
SIRRIS F43 CMX Tune | Front Fork
SIRRIS F43 CMX Tune | Front Fork
SIRRIS F43 CMX Tune | Front Fork
$2,250.00
**Default CMX Tuned Forks are for SurRon LBX-Standard Clamp | Call to order for other bike fitment/clamp and rider weight** : Medium (140-180lb) | CMX - Standard Clamp
  • Medium (140-180lb) | CMX - Standard Clamp
  • Heavy (180-220lb) | CMX - Standard Clamp
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