Dedicated Subsystem WorkbenchPlatform Gen: 2015–2026

2025 Yamaha YZF-R3 Suspension Hydraulics, Fork Fluids & Sag Tuner

Front fork travel, rear shock travel, spring preload, damping click baselines, and dynamic rider sag calculator for 2025 Yamaha YZF-R3.

Gen 2015–2026

Factory Platform Compatibility: All workshop fluid capacities, maintenance milestones, torque specifications, and consumables on this specification sheet are factory-identical across model years 2015 through 2026.

Select Model Year:(Active: 2025)

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

Engine

321cc

Drive

520

Cooling

Liquid-Cooled

Suspension Hydraulics, Fork Fluids & Interactive Sag Tuner

Showa • KYB • WP Standards

OEM hydraulic capacities, air-gap measurement standards, clicker baselines, and mathematical rider sag tuning.

Shop 37mm Fork Seals

Fork Architecture

Inverted USD Cartridge (37mm KYB Telescopic)

Oil Volume Per Leg

460 ml (15.5 US fl oz) per leg

OEM Fluid Specification

Yamaha Suspension Oil 10W (SAE 10W)

Air-Gap Spec (Oil Level)

110 mm (4.33 in) compressed, spring removed

Fork Seal Dimensions

37 x 50 x 11 mm

Total Suspension Travel

Front: 130 mm • Rear: 125 mm

Target Rider Sag: 32 - 38 mm (25 - 29% of 130 mm travel)

Front Preload Baseline

Non-adjustable factory internal spring

Rebound Damping Baseline

Fixed orifice hydraulic damper rod

Compression Damping Baseline

Fixed orifice hydraulic damper rod

Target Free Sag (Unladen)

20 - 25 mm

Enter 3-Point Sag Measurements (mm)

L1: Extended

L2: Static Bike

L3: In Full Gear

Suspension Sag Diagnosis & Geometry Status

Enter your extended, static, and rider measurements on the left (or select a preset) to compute exact sag percentages and spring preload recommendations.

Factory Fluid StandardDirect Spec

Maxima Racing Fork Fluid 10W (1 Liter)

Formulated with anti-foam agents and shear-stable viscosity index improvers to prevent damping fade under aggressive riding heat.

Fork & Dust Seal KitExact Stanchion Fit

All Balls Racing 37mm Fork & Dust Seal Kit

Features directional triple-lip rubber seal profile and external garter springs engineered to withstand heavy stanchion flex without weeping.

Air-Gap Tuning PhysicsBottoming Control

110 mm (4.33 in) compressed, spring removed

Trapped air column acts as a progressive spring in final 30% of stroke. Adding +5mm oil increases bottoming resistance without stiffening small bump compliance.

Recommended Maintenance Parts: Maxima Racing Fork Fluid 10W (1 Liter) • All Balls Racing 37mm Fork & Dust Seal Kit

Shop Fork Fluids Find Direct-Fit Fork Seals

Official NHTSA Safety Recalls & Technical Bulletins

5 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 5 safety recall campaigns associated with this platform. Independent repair shops and riders should confirm that authorized dealership warranty remedies have been applied.

NHTSA #21V048000EQUIPMENT:OTHER:LABELS

Received: 03/02/2021▼

Defect Description

Yamaha Motor Corporation, USA (Yamaha) is recalling certain 2019-2021 YZF-R3 motorcycles, 2019-2020 XMAX (CDZ300) scooters, and 2020 MT03 motorcycles. The Vehicle Identification Number (VIN) printed on the Federal Certification label may not match the VIN stamped on the vehicle. As such, these vehicles fail to comply with the requirements of 49 CFR Part 567, "Certification."

Safety Hazard / Consequence

The owner, referencing an incorrect VIN label, may not recognize their vehicle is involved in a safety recall, and may not have the recall remedy performed, which could increase the risk of injury, fire or a crash.

Factory Remedy & Repair Action

Yamaha will notify owners, and dealers will install a correct certification label, free of charge. The recall began February 19, 2021. Owners may contact Yamaha customer service at 1-800-962-7926. Yamaha's number for this recall is 990144.

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.safercar.gov.

NHTSA #20V611000VISIBILITY

Received: 05/10/2020▼

NHTSA #17V112000ELECTRICAL SYSTEM:IGNITION:SWITCH

Received: 21/02/2017▼

NHTSA #17V111000FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY

Received: 21/02/2017▼

NHTSA #15V593000DO NOT OPERATE / PARK OUTSIDESTEERING: STEERING WHEEL/HANDLE BAR

Received: 23/09/2015▼