The Ohlins YA638 TTX RT rear shock absorber is built for Yamaha YZF R1 applications where consistent damping and clear chassis feedback matter. Based on Ohlins twin-tube TTX architecture, it is designed to maintain stability and traction under demanding riding conditions. This is a gas-pressurised, oil/gas separated rear mono shock intended for precise control rather than comfort-biased compliance.

Ohlins | Made to race, perfected to ride

TTX RT is Ohlins’ track-focused rear shock platform, using a twin-tube damping layout to keep oil flow controlled and repeatable. The result is predictable response across long sessions and varying conditions, helping you keep the bike settled when load transfers quickly.

Shock design & features

  • Twin-tube TTX damping architecture for stable, consistent behaviour
  • Gas-pressurised, oil/gas separated design to reduce aeration and maintain damping control
  • Rear mono configuration to suit the Yamaha YZF R1 linkage and chassis layout

Tuning controls

This shock provides external adjustment for rebound damping and compression damping, allowing you to tune feel and support to match tyres, track grip and rider preference. Independent circuits help changes remain meaningful and repeatable.

Base setup (factory preset)

The YA638 is supplied with an Ohlins-fitted spring and a factory baseline intended to be a workable starting point for most riders. Fine-tuning is typically done after confirming sag and ride height for your load and use.

Before you install

  • Confirm the application is Yamaha YZF R1 and that your model/year matches this fitment
  • Set rider sag and check clearance through full suspension travel after installation
  • Record your starting adjuster positions before making changes, so you can return to baseline if needed

Öhlins Motorcycle Suspension Warranty

New Öhlins motorcycle shock absorbers, front forks and cartridge kits supplied by Teknik Motorsport are covered by the applicable Öhlins manufacturer’s warranty against defects in materials and workmanship.

Teknik Motorsport is an authorised Öhlins Service Centre and administers warranty claims in accordance with the Öhlins warranty conditions. The service intervals below form part of the maintenance requirements for Öhlins products supplied and supported by Teknik Motorsport.

This warranty is in addition to the consumer guarantees that apply under the Australian Consumer Law.

  • Registered motorcycles — non-competition road use Five years, subject to correct application, installation, setup and servicing every: 20,000 km or two years, whichever occurs first.
  • Registered motorcycles — adventure and light off-road use Five years, subject to correct application, spring rate, setup and servicing every: 10,000 km or annually, whichever occurs first.
  • Unregistered or competition motorcycles Two years for eligible Öhlins MX and Enduro products, subject to inspection every ten hours and servicing every: 30 operating hours or annually, whichever occurs first.

Compliance with the applicable service interval is a condition of the Öhlins manufacturer’s warranty. Evidence of servicing may be required when a warranty claim is assessed.

A seal leak, loss of damping performance or internal wear arising after the prescribed service interval has been exceeded will be treated as a service or maintenance issue rather than a manufacturing defect.

Warranty repairs

Öhlins suspension products are designed to be serviced and repaired. Where a warranty claim is approved, the normal remedy is repair of the customer’s original suspension unit using genuine Öhlins replacement parts.

Replacement of a complete shock absorber, fork or cartridge kit is not automatic and would normally occur only where the product has suffered a manufacturing failure that cannot reasonably be repaired. This is at Ohlins discretion. 

Öhlins spare parts and service kits

Öhlins spare parts, seals, bushes, service kits, springs, fluids and individual components are covered only against defects present when supplied.

No fixed age-based warranty applies to wear items, service parts or consumable components. Wear, deterioration, contamination, incorrect installation and damage caused by another component are not manufacturing defects.

Öhlins gives the customer a meaningful five-year warranty on products (Units), provided the suspension is maintained as suspension should be maintained. Teknik supports that warranty locally, can inspect the product properly, and can repair it with genuine parts rather than discarding it.

SKU YA638
Model # T36PR1C1LS
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

If your Motorcycle is listed below, this product will suit:

Position (Front or Rear) Rear Mono
Shock Length Eye to Eye (mm) 302.0 +4/-2
Spring Rate Standard 95.0 N/mm
Type Code T36PR1C1LS
Stroke Metal to Metal (mm) 65.0
Product Family TTX RT
Fitted Spring 21040-31

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