The Ohlins YA2190 STX 46 MX is a rear mono shock developed for motocross use on the Yamaha YZ 85. It is built around a pressurised damping design intended to keep damping response consistent under repeated hard hits. This unit is supplied without a spring, allowing spring rate selection to suit rider weight and track conditions.

Ohlins | Made to race, perfected to ride

STX motocross shocks are engineered to provide controlled damping behaviour and clear feedback at the limit. The YA2190 follows that approach with a focus on stability, traction and predictable response through changing track conditions.

Who this shock is for

  • YZ 85 riders wanting a purpose-built rear shock for motocross use
  • Riders chasing improved rear-wheel connection on acceleration and through rough sections
  • Owners who want adjustability to suit different tracks, tyres and riding styles

Shock design & features

This is a gas-pressurised shock with separated oil and gas to help maintain damping consistency as temperatures rise. The STX 46 MX architecture is designed for responsive damping control and repeatable behaviour over a moto.

Tuning controls

Adjustment is provided for compression and rebound damping, plus ride height adjustment to help tailor chassis balance. These controls let you refine support, traction and attitude without changing internal valving.

Before you install

  • No spring is supplied; select the appropriate spring as noted for this unit
  • Confirm fitment for your exact model and year before installation
  • Set sag and baseline adjusters methodically, making one change at a time during testing

Serviceability/lifecycle

Like all motocross shocks, regular servicing helps maintain damping performance and seal life. Service intervals should reflect usage intensity, track conditions and maintenance practices.

SKU YA2190
Model # S46PR1C2W
Barcode # YA2190
Brand Ohlins
Shipping Weight 5.0000kg
Shipping Size 0.300 x 0.300 x 0.500m
Type Units
See our Shipping Information See our Frequently Asked Questions
Position (Front or Rear) Rear Mono
Shock Length Eye to Eye (mm) 402.0
Spring Rate No Spring/s Supplied
Type Code S46PR1C2W
Stroke Metal to Metal (mm) 103.0
Product Family STX 46 MX
Notes Spring Series 00698-xx *Replaced by DMX 0104*
Fitted Spring Sold separately, see notes.
Rec. Ohlins Oil 01304-

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