Factory Workshop SpecificationsPlatform Gen: 2014–2026

2026 Honda Grom (MSX125) Specifications & Consumables

Official workshop technical reference: fluid capacities, spark plug codes, drive chain specs, and tire inflation pressures.

Gen 2014–2026

Factory Platform Compatibility: All workshop fluid capacities, maintenance milestones, torque specifications, and consumables on this specification sheet are factory-identical across model years 2014 through 2026.

Select Model Year:(Active: 2026)

2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Engine

124cc

Drive

420

Cooling

Air-Cooled

Engineering Subsystem Workbenches & Calculators

Dedicated deep-dive diagnostic tools, torque matrices, wiring pinouts, and calculators tailored for 2026 Honda Grom (MSX125).

10 Dedicated Engineering Spoke Pages

Subsystem Guide/torques

Fastener Torques

Engine drain plug, axle spindles, caliper mounts, triple clamp pinch bolts & thread lubrication derating guide.

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Subsystem Guide/fluids

Fluids & Capacities

Oil: 0.90 L (0.95 US qt) • Coolant: N/A (Air-Cooled) • Brake: DOT 4

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Subsystem Guide/fuses-relays

Fuses & Relays

Main: 30A Blade / Starter Magnetic Switch • Location: N/A

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Subsystem Guide/compression

Compression & Leakdown

Ratio: 10.0:1 • Std: 145-185 PSI • Limit: 120 PSI

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Subsystem Guide/valves

Valve Clearances

Intake: N/A mm • Exhaust: N/A mm

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Subsystem Guide/fuel-delivery

Fuel Delivery & TB Sync

Idle: N/A • Rail Pressure: N/A • Vacuum: N/A

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Subsystem Guide/electrical

Charging & Battery

Battery: YTZ5S • CCA: 65 • Regulated: 14.0 - 14.8 V DC

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Subsystem Guide/tires

Tires & Gearing

Front: 120/70-12 • Rear: 130/70-12

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Subsystem Guide/suspension

Suspension & Sag

Front Travel: 100 mm • Rear Travel: 103 mm

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Subsystem Guide/maintenance

Maintenance Schedule

Oil: Every 2,500 miles (4,000 km) mi • Valves: N/A • Plugs: Every 5,000 miles (8,000 km) mi

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Fluids & Service Capacities

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Engine Oil (Drain & Filter Change)0.90 L (0.95 US qt)

Engine Oil (Drain Only)0.80 L (0.85 US qt)

Recommended Oil ViscosityPro Honda GN4 10W-30 or 10W-40, JASO MA

Coolant System CapacityN/A (Air-Cooled)

Brake Fluid StandardDOT 4

Drivetrain, Chain & Gearing

Gearing Calculator →Shop Chains & Sprockets →

Drive Chain Pitch420

Chain Link Count106 Links

Front Sprocket Teeth15T

Rear Sprocket Teeth38T

Final Drive Configuration420 Pitch Chain

Ignition & Electrical Specifications

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OEM Spark Plug Part NumberNGK CPR6EA-9

Electrode Spark Plug Gap0.8 - 0.9 mm (0.031 - 0.035 in)

OEM Battery Reference CodeYTZ5S

Battery Output & Rating12V 3.5Ah 65 CCA

Spark Plug Inspection Interval5,000 miles (8,000 km) miles

Wheels, Tires & Inflation Pressures

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Front Tire Dimensions120/70-12

Cold Front Inflation Pressure29 PSI (Cold)

Rear Tire Dimensions130/70-12

Cold Rear Inflation Pressure29 PSI (Cold)

OEM Wheel Rim Widths (F / R)3.50" / 4.50"

Official NHTSA Safety Recalls & Technical Bulletins

0 Open Campaigns (Clean)

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

Verify VIN on NHTSA.gov

No Active Federal Safety Recalls Reported

The U.S. DOT National Highway Traffic Safety Administration (NHTSA) records zero open safety recall campaigns for the 2026 Honda Grom (MSX125) platform. Always check your individual 17-digit VIN at an authorized dealership or via NHTSA.gov for individual recall completions.

OEM Workshop Archives

Official Factory Service Bulletins & Field Updates

1 Documented Bulletin

Bulletin #HON-16V661Safety Recall KC4 (MTB 15216): Grom (MSX125) Fuel Pump Replacement & ECM Initialization

Source: Honda_Grom_Recall16V661_8528.pdf

Mandated Torques:Torque: 12 N·m (1.2 kg-m, 9 lbf·ft) (Fuel Pump Base Flange Nuts - Crisscross 2-3 Stages)Torque: 10 N·m (7 lbf·ft) (Fuel Tank Shroud Screws)

Consumable Specs:Genuine Fuel Pump Gasket 17572-GGL-J00Genuine Dust Seal 17518-GGL-J00SCS Short Connector 070PZ-ZY30100 for ECM Reset

Genuine Part Numbers:06160-K26-31617572-GGL-J0017518-GGL-J00

HONDA GROM 125 FUEL SYSTEMExploded View: In-Tank Fuel Pump & ECM Calibration (Safety Recall 16V-661 / KC4)

KIT # 06160-K26-316NHTSA 16V-661

Remedy Fuel Pump Assembly (Green Paint Mark)

Genuine Kit # 06160-K26-316 (Supersedes 06160-K26-306)

Base Nuts: 12 N·m (1.2 kg-m, 9 lbf·ft) Crisscross

CRITICAL SAFETY & EMISSIONS RECALL (Recall 16V-661 / Service Bulletin Grom125 #1 / KC4). Replaces defective fuel pump prone to resin impeller swelling and pump seizure. COUNTERMEASURE IDENTIFICATION: Verified by a green paint mark on the top of the pump housing and a black cap cover. DO NOT USE old recall kit 06160-K26-306.

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