Motor Scooter Parts - Technical Specifications Database

Honda ADV 150 & PCX 150 Rear Brake Pad and Shoe Replacement Master Guide

The Honda ADV 150 and PCX 150/160 platforms feature either a rear hydraulic disc brake or a mechanical drum brake depending on trim level. Over time, brake pads wear beyond the service limit, caliper slider pins seize from road contamination, and drum shoes glaze from aggressive engine braking. This guide standardizes the removal, cleaning, and installation sequence with OEM torque values for the rear caliper, axle shaft, and exhaust bracket to eliminate brake squeal and restore consistent stopping power.

1. Overview and Chronic Rear Brake Issues in Honda ADV 150 and PCX 150

Chronic rear brake symptoms typically appear between 5,000 and 8,000 miles and include:

Unbolting the 14mm muffler mounting bolts on the Honda ADV 150 to access the rear caliper
Figure 1: Unbolting the muffler assembly is required to gain full clearance for rear caliper and axle service on the ADV 150.
Field Diagnostic Note: Before replacing brake pads, squeeze the rear brake lever slowly and observe if lever travel is excessive. Excessive lever stroke without braking force usually means slider pins are seized and the caliper is floating freely rather than pressing the pads against the disc.

2. Required Tools and OEM Torque Specifications

Required Tools and Equipment

Fastener OEM Torque
Rear Brake Caliper Mounting Bolts 30 Nm (22 lbf·ft)
Rear Axle Shaft Nut 118 Nm (87 lbf·ft)
Rear Swingarm Arm Bolts 49 Nm (36 lbf·ft)
Rear Brake Hose Banjo Bolt 34 Nm (25 lbf·ft)
Pad Retaining Pin (5mm Allen) 18 Nm
Exhaust Header Flange Nuts 18 Nm
Field Diagnostic Note: Apply silicone grease only to the metal slider pin shafts and their bores. Any contamination of the pad friction surfaces, rotor face, or drum lining with grease will reduce braking efficiency by more than 60% and requires immediate pad replacement.

3. Step-by-Step Brake Pad Replacement Procedure

Step 1: Remove Muffler Assembly and Swingarm Support Bracket

  1. Park the ADV 150 on the center stand and allow the exhaust to cool completely.
  2. Remove the 12mm exhaust flange nuts at the cylinder head and the 14mm bolts holding the muffler bracket.
  3. Unbolt the rear swingarm support bracket to gain full access to the rear caliper and axle shaft.

Step 2: Unbolt Rear Brake Caliper and Remove Pads

  1. Remove the 12mm caliper mounting bolts securing the rear caliper to the swingarm bracket.
  2. Carefully slide the caliper off the rear brake rotor without bending the brake line.
  3. Unscrew the pad retaining pin stopper plug and the 5mm Allen pin holding the friction pads, then slide out old pads.
Pulling the 5mm Allen brake pad retaining pin out of the Honda ADV 150 rear caliper body
Figure 2: Removing the 5mm Allen retaining pin from the rear caliper allows the worn brake pads to slide out freely.

Step 3: Clean Caliper Pistons and Lubricate Slider Pins

  1. Spray brake cleaner to remove accumulated black brake dust from the caliper cavity and piston faces.
  2. Push the hydraulic caliper pistons back into their bores using a piston reset tool or large flathead screwdriver.
  3. Clean and lubricate the metal slider pins with silicone brake grease, keeping grease completely clear of friction surfaces.
Applying silicone brake grease to the ADV 150 rear caliper slider pins before installing new pads
Figure 3: Silicone brake grease applied to slider pin shafts ensures even caliper float and eliminates brake drag.

Step 4: Install New OEM Brake Pads and Retaining Pin

  1. Insert new OEM ceramic or sintered brake pads into the caliper guide slots.
  2. Thread the 5mm Allen retaining pin through the pad eyelets and tighten to 18 Nm.
  3. Reinstall the caliper over the rear brake disc and hand-thread the mounting bolts.
New OEM rear brake pads installed over the Honda ADV 150 rear brake disc rotor
Figure 4: New OEM pads seated over the rear brake rotor before caliper bolt torquing.

Step 5: Torque Caliper Bolts, Reinstall Exhaust, and Pump Brake Lever

  1. Torque the rear caliper mounting bolts to 30 Nm and the rear axle nut to 118 Nm if it was loosened.
  2. Reinstall the exhaust system and torque exhaust header flange nuts to 18 Nm.
  3. Pump the rear brake lever 5 to 6 times until firm hydraulic pressure is restored before test riding.
Torque wrench set to 30 Nm tightening the Honda ADV 150 rear caliper mounting bolts
Figure 5: Final torque of the rear caliper mounting bolts to 30 Nm confirms correct clamping load and prevents caliper migration under braking.
Field Diagnostic Note: Cross-reference brake pad part numbers and rotor thickness limits with the Honda ADV 150 Master Guide and the Honda PCX 150 Master Guide. Minimum rear disc rotor thickness on the ADV 150 is 3.5 mm; rotors below this dimension must be replaced together with the pads to restore OEM braking geometry.
Gregório - Author & Industrial Administrator

About the Author: Gregório

Industrial Administrator & Lean Manufacturing Consultant. Technology enthusiast passionate about bridging industrial process engineering with technical publishing. With a background in waste elimination, standardized specifications, and zero-rework quality control, Gregório curates the Motor Scooter Parts technical database to provide mechanics and DIY riders with field-tested OEM torque tolerances and precision diagnostic standards.