R46 MX Tune | 2SC | Surron Ultra Bee 1.2
R46 MX Tune | 2SC | Surron Ultra Bee 1.2
R46 MX Tune | 2SC | Surron Ultra Bee 1.2
R46 MX Tune | 2SC | Surron Ultra Bee 1.2

Sirris

R46 MX Tune | 2SC | Surron Ultra Bee 1.2

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$999.00
Rider Weight Range
Rider Weight Range:
Tune
Tune:
Damper Adjust
Damper Adjust:

Pair with
Description

MORE ADJUSTABILITY. MORE CONTROL.

Now with 2SC (Two Stage Compression), revised rebound tuning and clicker settings, updated bumper, and new graphics.

MX Tune is purpose-built for motocross performance. Its race-focused setup delivers the balance, control, and bottoming resistance needed to charge through big jumps, hammer whoops, and attack fast corners at race pace.

RIDER WEIGHT SPECS:

Sirris offers five weight ranges to choose from when selecting your MX Tune R46 shock. (Listed weight ranges are rider weight without riding gear on. 15 pounds of riding gear is calculated into the weight ranges)

< 160 lbs (Light = 85 N/mm spring)
160-200 lbs (Medium = 95 N/mm spring)
200-240 lbs (Heavy = 105 N/mm spring)
240-280 lbs (X Heavy = 115 N/mm spring)
> 280 lbs (XX Heavy = 125 N/mm spring)

PRODUCT SPECS:

Architecture
Piggyback, steel spring

Stroke
85 mm

Length
320 mm

Weight
3.9 lbs / 1.76 kg without spring

Adjusters
2SC = Two Stage Compression (Independent high-speed and low-speed adjust)

• Low-speed compression adjust, 18 clicks
• High-speed compression adjust, 24 clicks (20mm hex)
• Rebound adjust, 24 clicks
• Spring preload adjust

Damping
High-flow base valve cavity architecture. Massive oil flow delivers true moto-level damping feel, control, and consistency. MX Tune damping with fully tunable compression and rebound circuits with high-flow internals that stay cool and consistent. 

The result is exceptional pressure balance, faster frequency response, and a level of responsiveness normally reserved for full-size motocross suspension.

Tuned specifically for Surron Ultra Bee and designed to pair perfectly with Sirris F43 forks, it delivers unmatched balance, traction, and confidence at speed.  

Reservoir
Specifically designed around the large 16mm shaft and high oil displacement demands. The massive R46 internal floating piston system manages shaft displacement with precision, maintaining consistent damping feel under repeated hard hits and high heat loads.

Shaft 
Massive 16mm induction heat-treated hollow shaft with hard chrome finish — delivers extreme structural strength and huge oil flow through the main piston for true moto-level damping performance.

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

Piston 
High-flow main piston uses true powersports architecture, it delivers massive tuning range and consistent damping performance.

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

Piston band
Hard band

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

Seals
NBR