Bleeding the Brakes on a 2012 Triumph Tiger Explorer

Shop parts for a 2012 Triumph Tiger Explorer Motorcycle.

The 2012 Triumph Tiger Explorer was Triumph’s big, shaft-driven 1200cc adventure tourer, and it stops with hydraulic disc brakes front and rear with ABS. The front brake is fed by the master cylinder and reservoir on the right handlebar. The rear brake is fed by a separate master cylinder operated by the foot pedal, with its own reservoir. Each circuit is bled independently through the bleeder on its caliper. A routine bleed through those bleeders is the normal way to refresh fluid on this ABS-equipped bike.

Why a Heavy Tourer Needs Fresh Fluid

Brake fluid absorbs moisture over time, lowering its boiling point. The Explorer is a heavy machine, and with a passenger and full luggage on a long descent, its brakes can get hot enough to boil old fluid. The vapor that forms compresses, so the lever goes soft and the brakes fade. Many riders refresh the fluid on a regular schedule for that reason.

Bleed soon if:

  • The lever feels spongy or pulls closer to the grip than it used to
  • The rear pedal feels soft or sinks
  • The fluid in a reservoir is dark or cloudy
  • The system was opened for new lines, caliper service, or master cylinder repair

Tools and Supplies

  • Fresh brake fluid of the type marked on the master cylinder reservoir cap, from a sealed container
  • A box-end wrench that fits the bleeder valves
  • 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

A one-way check-valve bleeder or vacuum bleeder lets you do the job without a helper.

Preparing the Explorer

Support the bike securely upright on its center 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, so wipe up any spill immediately and rinse with water. Clean the reservoir caps before opening them.

Bleeding Steps

  1. Remove the front reservoir cap and diaphragm.
  2. Draw out most of the old fluid with the syringe, keeping the reservoir from running dry.
  3. Refill with fresh fluid.
  4. Attach the clear tube to the bleeder of the front caliper farthest from the master cylinder, with the free end in the catch bottle.
  5. Squeeze and hold the lever.
  6. Open the bleeder about a quarter turn to let fluid and air escape.
  7. Close the bleeder before releasing the lever.
  8. Repeat, topping off the reservoir every few strokes so it never runs low enough to draw in air.
  9. When fresh, clean, bubble-free fluid comes through, close the bleeder.
  10. Bleed the second front caliper, if your bike has one.
  11. Bleed the rear caliper using the foot pedal and rear reservoir.

Protecting the ABS Unit

The single most important habit on an ABS bike is keeping the reservoir topped off. If it runs low enough to pull air into the master cylinder, that air can find its way into the ABS unit, where a normal caliper bleed may not reach it. Check the level after every few strokes, use smooth strokes rather than fast pumping, and make sure the clear tube fits snugly on the bleeder.

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 slowly sink under steady pressure. Spin both wheels to confirm the brakes are not dragging. Test the brakes at low speed in a safe area before riding normally.

When to See a Shop

Have the bike inspected if the lever will not firm up after several attempts, only firms up after pumping, keeps producing bubbles, or if fluid leaks from a master cylinder or caliper. 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 2012 Triumph Tiger Explorer Motorcycle.

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Shop Brake Pads for a 2012 Triumph Tiger Explorer Motorcycle.

Shop Stands for a 2012 Triumph Tiger Explorer Motorcycle.

Shop Brake Tools for a 2012 Triumph Tiger Explorer 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.