Dedicated Subsystem WorkbenchPlatform Gen: 2014–2026

2023 Honda Grom (MSX125) Valve Clearance Specs & Shim Calculator

Cold valve clearance specs for 2023 Honda Grom (MSX125): intake mm, exhaust mm, inspection intervals and replacement shim calculator.

Technical PassportOEM VERIFIED

Engine

124cc

Cooling

Air-Cooled

Final Drive

420 Chain

Engine Oil

0.90 L (0.95 US qt)

Spark Plug

NGK CPR6EA-9

Front Tire

120/70-12

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.

SPECS-TO-CART BUNDLESFactory Direct-Fit Maintenance Bundles Available

1-Click verified Motul engine oil service kits, race filters, spark plugs, and brake fluid pre-measured for this 2023 Honda Grom (MSX125).

Configure Service Bundles→

Select Model Year:(Active: 2023)
13 Production Years (2014–2026)

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

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: N/A (Screw & Locknut Tappet)

Active Valve Range (INTAKE)

0.08 - 0.12 mm

0.003 - 0.005 in

Nominal Mid-Spec Target

0.10 mm

Ideal cold lash assembly setting

Shim Diameter / Tappet

N/A (Screw & Locknut Tappet)

Tappet screw & locknut

Measurement Condition

Cold Engine (≤ 35°C / 95°F)

TDC compression stroke only

Direct Screw & Locknut Tappet System (Zero Shims Required)

This motorcycle utilizes mechanical rocker-arm screw and locknut adjusters. Replacement shims are not used on this cylinder head. Adjust clearances directly with feeler gauges, a 9mm tappet locknut wrench, and a 3mm square-drive tappet adjuster tool.

Feeler Gauge & Tool Spec

Straight blade feeler gauge, 9mm tappet wrench & 3mm square valve adjuster

Timing Alignment Mark

Align 'T' mark on flywheel with index mark on left crankcase cover inspection window

Locknut Torque Specification

Adjustable via square-drive screw & 9mm locknut (Torque locknut to 9 N·m)

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 2023 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.