Dedicated Subsystem WorkbenchPlatform Gen: 2019–2025

2023 Yamaha YZ250F Valve Clearance Specs & Shim Calculator

Cold valve clearance specs for 2023 Yamaha YZ250F: intake mm, exhaust mm, inspection intervals and replacement shim calculator.

Technical PassportOEM VERIFIED

Engine

250cc

Cooling

Not Available

Final Drive

520 Chain

Engine Oil

0.75 L (0.79 US qt)

Spark Plug

NGK LMAR9E-J

Front Tire

80/100-21 51M

Gen 2019–2025

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 2025.

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 Yamaha YZ250F.

Configure Service Bundles→

Select Model Year:(Active: 2023)
7 Production Years (2019–2025)

2019 2020 2021 2022 2023 2024 2025

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)

0.12 - 0.19 mm

0.0047 - 0.0075 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: 0.12 - 0.19 mm

2. Currently Installed Shim (mm)

Measured with micrometer or read laser-etched face

TDC Crankshaft Timing Index

Align crankshaft TDC mark with generator cover inspection window and cam sprocket punch marks

Feeler Gauge Technique

Angled stainless steel feeler gauge (cold engine ≤ 35°C / 95°F) — direct bucket-over-shim

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 Yamaha YZ250F platform. Always check your individual 17-digit VIN at an authorized dealership or via NHTSA.gov for individual recall completions.