Dedicated Subsystem WorkbenchPlatform Gen: 2019–2024

sms%3A6572176457 Honda CB500X / NX500 Cylinder Compression & Leakdown Diagnostic Engine

Factory compression specs for sms%3A6572176457 Honda CB500X / NX500: standard pressure 165 - 210 PSI (1138 - 1448 kPa), service limit 142 PSI, dry vs wet test diagnostics and acoustic leak stethoscope.

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

Browse Flagship Teardowns →

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: sms%3A6572176457)
6 Production Years (2019–2024)

2019 2020 2021 2022 2023 2024

Suggested Items4 Verified Workshop Consumables Available for this Job

View Suggested Items ↓

Cylinder Compression & Leakdown Diagnostic Engine

Multi-Cylinder Dry vs. Wet Test Bench, Differential Pressure Regulator & Acoustic Stethoscope Locator

Ratio: 11.5:1Std: 165-210 PSILimit: 142 PSIWhip Adapter: M10 x 1.0

Diagnostic Presets:

Cyl #1 (Left)IN-SPEC

194PSI(1338 kPa)

Cyl #2 (Right)IN-SPEC

192PSI(1324 kPa)

Cross-Cylinder Variance: Δ 2 PSI (OEM Limit: ≤ 14 PSI)

VARIANCE IN-SPEC

All cylinders demonstrate strong, balanced mechanical sealing. Piston ring packs, cylinder cross-hatch, and valve seats are within factory specification.

Official Workshop Manual Compression Test Protocol

Step 0 of 5 Completed

Step 1: Engine Operating Temperature

Run engine until coolant reaches 60°C - 80°C (140°F - 176°F). Cylinder expansion brings rings and pistons to true operating clearances.

Step 2: Spark Plug Removal & Port Clean

Blow compressed air around spark plug wells to eject grit, then remove all spark plugs. Thread in M10 x 1.0 whip adapter hand-tight with fresh O-ring.

Step 3: Wide-Open Throttle (WOT) Lock

Hold throttle grip fully wide open (or lock throttle bodies open) to eliminate intake butterfly vacuum restriction and ensure 100% volumetric cylinder filling.

Step 4: Battery Tender Voltage Stabilization

Connect a 12V shop battery tender or booster. Starter must sustain uninterrupted cranking speed (350 RPM) to build maximum dynamic stroke pressure.

Step 5: Crank 4-6 Compression Strokes

Engage starter until gauge needle ceases rising (typically 4 to 6 strokes). Record maximum peak pressure and compare against the OEM limits above.

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.