Dedicated Subsystem WorkbenchPlatform Gen: 2014–2020

2019 Yamaha MT-09 Cylinder Compression & Leakdown Diagnostic Engine

Factory compression specs for 2019 Yamaha MT-09: standard pressure 156 - 218 PSI (1076 - 1503 kPa), service limit 142 PSI, dry vs wet test diagnostics and acoustic leak stethoscope.

Gen 2014–2020

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 2020.

Select Model Year:(Active: 2019)

2014 2015 2016 2017 2018 2019 2020

Engine

847cc

Drive

525

Cooling

Liquid-Cooled

Cylinder Compression & Leakdown Diagnostic Engine

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

Ratio: 11.5:1Std: 156-218 PSILimit: 142 PSIWhip Adapter: M10 x 1.0

Diagnostic Presets:

Cyl #1 (Left)IN-SPEC

196PSI(1351 kPa)

Cyl #2 (Center)IN-SPEC

194PSI(1338 kPa)

Cyl #3 (Right)IN-SPEC

192PSI(1324 kPa)

Cross-Cylinder Variance: Δ 4 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

1 Active Campaign

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

NHTSA #22V130000DO NOT OPERATE / PARK OUTSIDEENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE

Received: 07/03/2022▼

Defect Description

Yamaha Motor Corporation, USA (Yamaha) is recalling certain 2021-2022 MT-09, MT-09 SP, and MTT9GT (Tracer 9 GT) motorcycles. Improper electronic control unit (ECU) programming may limit the throttle response, cause an engine stall, or fail to illuminate the engine warning light when a system error occurs.

Safety Hazard / Consequence

Limited throttle response, engine stall, or a missing warning light can increase the risk of a crash.

Factory Remedy & Repair Action

Owners should not operate their motorcycle, other than to take it to a dealer, until the remedy is performed. Dealers will reprogram the ECU, free of charge. Owner notification letters were mailed March 17, 2022. Owners may contact Yamaha customer service at 1-866-894-1626. Yamaha's number for this recall is 990158.

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.