Description

Sirris Suspension for Sur-Ron Ultra Bee - A New Era in E-Moto Performance

Transform your Sur-Ron Ultra Bee with Sirris Suspension, designed specifically for e-moto riders ready to elevate their ride. With advanced tuning, durable materials, and a design made to adapt, Sirris Suspension redefines what’s possible in off-road suspension.

Features:

  • Optimized Trail Tune

    • Initial setup tailored for riders 170-210 lbs
    • Future options for heavier riders and MX-specific tuning
    • Customizable with multiple spring rates for highly adjustable performance
  • F43 Fork: Responsive & Balanced

    • 246 mm of plush travel for smoother rides
    • True symmetrical closed cartridge design ensures balanced, fade-resistant performance
    • Dual oil circuits separate lubrication and damping for optimal handling
    • Built with 7000-series aluminum and hard chrome stanchions for long-lasting durability
  • R46 Shock: Fully Adjustable for Any Rider

    • Low Speed Compression (LSC) adjustment for maximum responsiveness
    • Optional DSC (Dual Speed Compression) for wider adjustment range, available soon
    • Hard anodized finish for added protection and a fresh look after miles of riding
    • Compatible up to 300 lbs with high-tensile steel spring options
  • Easy Installation

    • Plug-and-play design—direct swap for Ultra Bee without extra modifications
    • Dust seal and headset bearing pre-installed for faster setup
  • Compression, Rebound, and Preload Adjustability

    • Fine-tune to match your ride style with compression, rebound, and preload controls
    • Lightweight design: 8.8 lbs (4 kg) per leg for F43 fork, 3.88 lbs (1.76 kg) for R46 shock plus spring

We will contact you after your order has been placed for rider-specific information.

Owners Guide

F43 FORK

43MM USD, 856MM X 246MM, 25MM OFFSET, SURRON ULTRA BEE SPEC

Architecture

Upside down fork

Travel

246 mm

Free length

856 mm

Fork weight, incl clamps and steerer

22 lbs / 10kg

Stanchions

Ø43, chrome-plated steel

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 

 

R46 SHOCK 

46MM PISTON, 320MM X 85MM, SURRON ULTRA BEE SPEC

Architecture

Piggyback, steel spring

Stroke

85 mm

Length

320 mm

Weight

3.9 lbs / 1.76 kg without spring

Piston 

High flow Ø46 mm, CNC 6061 billet aluminum, type 3 hard anodized coating

Piston band

Hard band

Shaft 

Ø16 mm OD chrome-plated, induction hardened steel, hollow, Ø 5.5 mm ID

Shock body

Seamless 6061 aluminum, type 3 hard anodized coating, ACME thread

Spring retainer

Seamless 6061 aluminum, type 3 hard anodized coating, ACME thread, with locking feature, manual adjust

Bottom out

MCU bumper

Top out

Rubber bumper

Damping

Tunable compression and rebound

Reservoir

Pressurized with floating piston

Adjusters

External compression and rebound adjustment

Seals

NBR 

 

Weight Chart and Riding Style for ordering:

STOCK ULTRA BEE TRIANGLE FITMENT:

For guaranteed fitment on your Surron Ultra Bee, we highly recommend the Sirris Rear Triangle installed during the shock installation procedure.

The Sirris Shock is designed to offer the maximum possible piston size and still fit within the stock linkage. Tolerances on each stock Ultra Bee vary. Light contact between spring OD and stock triangle may occur. We highly recommend our higher clearance triangle to prevent this.

WARNING: Some aftermarket triangle links may have significant interference that could damage the shock and/or triangle. It’s important to check clearance as you assemble and cycle the suspension. Do not install Sirris shock if any interference is detected. Failure to properly install the shock with proper triangle can lead to a loss of control of the motorcycle which can result in SERIOUS INJURY OR DEATH.

Fitment

Surron Ultra Bee