How to Bleed the Brakes on a 2020 Triumph Tiger 900 GT

Shop parts for a 2020 Triumph Tiger 900 GT Motorcycle.

The GT’s Brakes in Brief

The 2020 Triumph Tiger 900 GT is the road-focused version of the Tiger 900, and it uses hydraulic disc brakes front and rear with ABS. The front circuit runs from the master cylinder and reservoir on the right handlebar to the front caliper bleeders. The rear circuit runs from a master cylinder operated by the foot pedal, with its own reservoir, to the rear caliper bleeder. You will bleed the two circuits separately. A routine caliper bleed is the normal way to refresh fluid on this ABS-equipped bike.

When to Bleed

Brake fluid absorbs moisture over time, which lowers its boiling point and can cause brake fade under hard use. The GT is built for touring and fast road riding, both of which can put a lot of heat into the brakes, especially with luggage and a passenger. Many riders refresh the fluid on a regular schedule for that reason.

Bleed sooner if:

  • The lever feels spongy or pulls closer to the grip than it used to
  • The rear pedal feels soft
  • The fluid looks dark or cloudy
  • You recently replaced brake lines, serviced a caliper, or worked on a master cylinder

Tools and Materials

  • Fresh brake fluid of the type marked on the reservoir cap, from a sealed container
  • A box-end wrench that fits the bleeder valve
  • Clear tubing that fits snugly over the bleeder
  • A catch bottle
  • A syringe or turkey baster
  • A screwdriver or driver for the reservoir caps
  • Rags or shop towels
  • Optional: a one-way check-valve bleeder or vacuum bleeder for working alone

Preparing the GT

Support the bike securely upright on its center stand or a paddock stand. Turn the handlebars until the front reservoir is level. Cover the tank, bodywork, and dash with rags. Most brake fluids damage paint and plastic on contact; wipe up spills immediately and rinse with water.

Step-by-Step Bleed

  1. Remove the front reservoir cap and diaphragm.
  2. Remove most of the old fluid with the syringe, keeping the bottom of the reservoir covered.
  3. Refill with fresh fluid.
  4. Fit the clear tube onto the bleeder of the front caliper farthest from the master cylinder and route it into the catch bottle.
  5. Squeeze and hold the lever.
  6. Open the bleeder about a quarter turn to release fluid and air.
  7. Close the bleeder before releasing the lever.
  8. Repeat, topping off the reservoir regularly so it never runs low enough to draw in air.
  9. When the fluid in the tube is fresh, clean, and bubble-free, close the bleeder.
  10. Bleed the second front caliper, if equipped.
  11. Bleed the rear caliper using the foot pedal, keeping the rear reservoir topped up.

Reading the Tube and Avoiding Air

The first fluid out is usually darker and may contain bubbles. Keep going until the fluid in the clear tube is clean and several strokes produce no bubbles. If bubbles never stop, check that the tube fits snugly on the bleeder. And keep the reservoir full: on an ABS bike, air drawn into the master cylinder can work its way into the ABS unit, where a caliper bleed may not reach it.

Finishing and Testing

Tighten each bleeder snugly without overtightening. Fill the reservoirs to the correct level marks, reinstall the diaphragms and caps, and clean away any spilled fluid. Check the bleeders and banjo fittings for leaks, and dispose of the old fluid properly.

The lever and pedal should feel firm and consistent and should not sink slowly under steady pressure. Spin both wheels to confirm the brakes are not dragging, then test the brakes at low speed in a safe area before riding normally.

When a Shop Is Needed

Take the bike in if the lever will not firm up after several attempts, if it only firms up after pumping, if bubbles keep appearing, or if a master cylinder or caliper is leaking. If a reservoir ran dry or the ABS unit or its lines were disconnected, air may have entered the ABS unit, and the system may require a dealer-level procedure or diagnostic tool.

Related Shopping Categories

Shop Brake Fluid for a 2020 Triumph Tiger 900 GT Motorcycle.

Shop Brake Lines for a 2020 Triumph Tiger 900 GT Motorcycle.

Shop Brake Pads for a 2020 Triumph Tiger 900 GT Motorcycle.

Shop Stands for a 2020 Triumph Tiger 900 GT Motorcycle.

Shop Brake Tools for a 2020 Triumph Tiger 900 GT Motorcycle.

Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.