Dedicated Subsystem WorkbenchPlatform Gen: 2019–2024

2021 Honda CB500X / NX500 Valve Clearance Specs & Shim Calculator

Cold valve clearance specs for 2021 Honda CB500X / NX500: intake mm, exhaust mm, inspection intervals and replacement shim calculator.

Technical PassportOEM VERIFIED

Engine

471cc

Cooling

Liquid-Cooled

Final Drive

520 Chain

Engine Oil

2.70 L (2.85 US qt)

Spark Plug

NGK CPR8EA-9

Front Tire

110/80R19

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Gen 2019–2024

Factory Platform Compatibility: All workshop fluid capacities, maintenance milestones, torque specifications, and consumables on this specification sheet are factory-identical across model years 2019 through 2024.

Select Model Year:(Active: 2021)
6 Production Years (2019–2024)

2019 2020 2021 2022 2023 2024

Suggested Items4 Verified Workshop Consumables Available for this Job

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Factory Valve Clearance & Shim Calculator

OEM Workshop Tolerances

Cylinder head valve lash specifications, timing TDC mark alignments, and interactive replacement shim calculation engine.

Adjustment Mechanism: 7.48 mm

Active Valve Range (INTAKE)

0.10 - 0.20 mm

0.004 - 0.008 in

Nominal Mid-Spec Target

0.15 mm

Ideal cold lash assembly setting

Shim Diameter / Tappet

7.48 mm

Bucket-and-shim interface

Measurement Condition

Cold Engine (≤ 35°C / 95°F)

TDC compression stroke only

Interactive Shim Sizing Calculation Engine: New Shim = Current Shim + (Measured Clearance - Target Clearance)

1. Feeler Gauge Measured Clearance (mm)

Factory intake tolerance: 0.10 - 0.20 mm

2. Currently Installed Shim (mm)

Measured with micrometer or read laser-etched face

TDC Crankshaft Timing Index

Align crankshaft TDC mark with engine timing index pointer

Feeler Gauge Technique

Angled stainless steel feeler gauge (cold engine ≤ 35°C / 95°F)

Official NHTSA Safety Recalls & Technical Bulletins

2 Active Campaigns

U.S. Department of Transportation compliance database (Title 49 U.S.C. Chapter 301).

Verify VIN on NHTSA.gov

The U.S. National Highway Traffic Safety Administration reports 2 safety recall campaigns associated with this platform. Independent repair shops and riders should confirm that authorized dealership warranty remedies have been applied.

NHTSA #21V382000EXTERIOR LIGHTING

Received: 24/05/2021▼

Defect Description

Honda (American Honda Motor Co.) is recalling certain 2020-2021 Super Cub C125, CB500X, CB650R, CBR300R, CBR500R, CBR650R, Rebel 300, Rebel 500, Monkey, 2020 CRF250L, GROM, 2021 CRF300L, and CB500F motorcycles. The rear reflector lens may not reflect brightly enough. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 108, "Lamps, Reflective Devices, and Associated Equipment."

Safety Hazard / Consequence

A dim rear reflector may reduce the visibility of the motorcycle to other drivers, increasing the risk of a crash or injury.

Factory Remedy & Repair Action

Dealers will replace the rear reflector, free of charge. Owner notification letters were mailed July 7, 2021. Owners may contact Honda customer service at 1-866-784-1870. Honda's number for this recall is KM3.

Manufacturer Notes: Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

NHTSA #21V690000SERVICE BRAKES, HYDRAULIC

Received: 02/09/2021▼

OEM Workshop Archives

Official Factory Service Bulletins & Field Updates

1 Documented Bulletin

Bulletin #HON-21V690Safety Recall KM6 (MTB 17758): CB500X & CBR500R ABS Brake Modulator Internal Valve Contamination

Source: Honda_CB500X_Recall21V690_KM6_ABSModulator.pdf

Mandated Torques:Torque: 34 N·m (3.5 kg-m, 25 lbf·ft) (4x M10 Hydraulic Brake Line Banjo Bolts)Torque: 10 N·m (7.4 lbf·ft) (ABS Modulator Bracket Mounting Bolts)Torque: 5.4 N·m (48 in·lb) (Front & Rear Brake Caliper Bleeder Valves)

Consumable Specs:Pro Honda DOT 4 Brake Fluid (Fresh Bottle)Genuine Copper Sealing Washers (4x Included in Set)Air Cleaner Seal (Included in Set)

Genuine Part Numbers:06570-MKP-30606570-MKP-305

HONDA CB500X / CBR500R HYDRAULIC ABSExploded View: ABS Brake Modulator & Lot Code Inspection (Safety Recall 21V-690 / KM6)

KIT # 06570-MKP-306NHTSA 21V-690

ABS Modulator Assembly & Lot Code Stamping

CB500XA: 06570-MKP-306 / CBR500RA: 06570-MKP-305

Bracket Bolts: 10 N·m (7.4 lbf·ft)

CRITICAL SAFETY RECALL (Recall 21V-690 / Service Bulletin MTB 17758 / KM6). Manufacturing grease contamination causes internal valve leakage, resulting in increased brake lever travel and loss of front braking force. LOT CODE CHECK: Stamped on right face of modulator body. Unacceptable codes starting with 9F, 9H, 9K, 9L, 9N must be replaced.