Dedicated Subsystem WorkbenchPlatform Gen: 2006–2026

2012 Vespa GTS 300 / GTS 300 Super Charging System, Stator AC Output & Battery Health

Stator 3-phase AC voltage at 5,000 RPM, coil resistance, regulated DC voltage, battery code YTX12-BS, CCA rating, and multimeter charging diagnostic steps for 2012 Vespa GTS 300 / GTS 300 Super.

Gen 2006–2026

Factory Platform Compatibility: All workshop fluid capacities, maintenance milestones, torque specifications, and consumables on this specification sheet are factory-identical across model years 2006 through 2026.

Select Model Year:(Active: 2012)

2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Engine

278cc

Drive

Not Available

Cooling

Liquid-Cooled with Dual Lateral Front Radiators & Electric Fan

3-Phase Charging System & Battery Diagnostic Flowchart

Yuasa & OEM Standards

Multimeter troubleshooting protocols, cold cranking amps (CCA) ratings, 3-phase stator AC outputs, and regulator-rectifier health verification.

Shop YTX12-BS Batteries

OEM Battery Code

YTX12-BS

Cold Cranking Rating

Not Available

Capacity (10HR Rate)

Not Available

Regulated Output Spec

Key-OFF Parasitic Limit

Enter Multimeter DC Voltage Reading

V DC

Multimeter Test Diagnosis

Enter your multimeter terminal reading on the left to view instant diagnostic interpretations and recommended workshop actions.

OEM Factory AGM BatteryOEM Replacement

Dimensions: • Weight: Not Available. Pre-filled absorbed glass mat technology engineered for heavy vibration resistance.

Lithium LiFePO4 UpgradeUp to 70% Lighter

Features built-in RE-START jump starting reserve. Never stranded by dead lights: press the restart button on the top terminal to crank the motorcycle without jumper cables.

Smart Maintainer SpecBattery Life Extension

Standard Charge Rate: . Automated desulfation & float maintenance ensures full capacity retention during off-season winter storage.

Recommended Parts: •

Shop Smart Battery Chargers Find Direct-Fit Batteries

Vespa Diagnostic Fault Codes & Multimeter Bench Testing

FI & OBD2 Decoder

Authentic factory ECU fault codes, sensor resistance specifications, and harness pinout troubleshooting.

Launch Full Vespa DTC Engine→

Code P0105Manifold Absolute Pressure (MAP) Sensor

Intake manifold pressure sensor circuit malfunction or vacuum nipple disconnected.

Test: Check 5.0V VRef and signal output: ~2.5-3.0V DC at atmospheric key-on.

Code P0115Engine Coolant Temperature (ECT) Sensor

Coolant temperature NTC sensor circuit open or shorted out of range.

Test: Measure thermistor: ~2.5 kΩ at 20°C (68°F); 290-330 Ω at 80°C (176°F).

Code P0120Throttle Position Sensor (TPS)

Integrated throttle body potentiometer signal voltage out of calibrated range.

Test: Measure TPS sweep from idle (0.6V) to wide-open throttle (4.2V); verify smooth voltage curve.

Code P0335Crankshaft Position Sensor (CKP / Pickup)

Zero timing pulses detected from flywheel reluctor ring during cranking.

Test: Measure inductive pickup coil resistance: 110-140 Ω across connector pins.

Code P0351Ignition Coil Primary Circuit

Ignition coil primary winding circuit open, shorted, or high driver resistance.

Test: Measure primary resistance: 0.4-0.6 Ω; secondary resistance with cap: 5.0-6.5 kΩ.

Code P0505Stepper Motor Idle Speed Control

Stepper motor bypass valve carbon build-up or idle speed out of target range.

Test: Clean throttle body air bypass port; perform Piaggio PADS / OBD-II adaptation reset.

Looking for other error codes, sensor pinouts, or OBD2/Euro 5 codes?

View All 68 Multi-Brand Diagnostic Trouble Codes →

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 2012 Vespa GTS 300 / GTS 300 Super 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 #FSB-VES-GTS-01Technical Service Bulletin FSB-VES-GTS-01: Single-Sided Trailing Link Front Spindle Bearing Overhaul, ASR Sensor Air Gap & Rear Hub Gear Oil Service

Source: Piaggio_Vespa_GTS300_Trailing_Link_ASR_Service.pdf

Mandated Torques:Torque: 90–110 N·m (66–81 lb-ft) (Front Wheel Hub Castle Nut & Cotter Pin)Torque: 40–45 N·m (30–33 lb-ft) (Front Trailing Link Shock Lower Mounting Bolt)Torque: 40–45 N·m (30–33 lb-ft) (Upper Steering Column Locking Ring Nut)Torque: 15–18 N·m (11–13 lb-ft) (Rear Hub Final Gear Oil Drain & Fill Plugs)

Consumable Specs:Eni i-Ride PG 5W-40 Full Synthetic OilEni Rotra Bike 80W-90 Hub Gear OilWaterproof Marine Calcium-Sulfonate Grease (Trailing Link Needle Rollers)

Genuine Part Numbers:B0181521A0082725638141R000564

Vespa Italian Heritage EngineeringGTS 300 / Super HPE