Dedicated Subsystem WorkbenchPlatform Gen: 2019–2024

2022 BMW R 1250 GS Charging System, Stator AC Output & Battery Health

Stator 3-phase AC voltage at 5,000 RPM, coil resistance, regulated DC voltage, battery code YTX14-BS, CCA rating, and multimeter charging diagnostic steps for 2022 BMW R 1250 GS.

Technical PassportOEM VERIFIED

Engine

1254cc

Cooling

Liquid/Air-Cooled

Final Drive

Shaft Drive

Engine Oil

4.00 L (4.23 US qt)

Spark Plug

NGK LMAR8D-J

Front Tire

120/70R19

Gen 2019–2024

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 2024.

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 2022 BMW R 1250 GS.

Configure Service Bundles→

Select Model Year:(Active: 2022)
6 Production Years (2019–2024)

2019 2020 2021 2022 2023 2024

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 YTX14-BS Batteries

OEM Battery Code

YTX14-BS (VRLA / AGM Maintenance-Free)

Cold Cranking Rating

200 CCA

Capacity (10HR Rate)

12 Ah (12V)

Regulated Output Spec

14.3 - 14.8 V DC

Key-OFF Parasitic Limit

< 1.5 mA (CAN-bus sleeping state)

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

Yuasa YTX14-BS High Performance AGM Battery

Dimensions: 150 L × 87 W × 145 H mm • Weight: 10.1 lbs (4.6 kg). Pre-filled absorbed glass mat technology engineered for heavy vibration resistance.

Lithium LiFePO4 UpgradeUp to 70% Lighter

Antigravity ATX-12 Re-Start (360 CCA) / ATX-20 (680 CCA)

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

12V AGM / Float 1.25A

Standard Charge Rate: 1.2A (Max 2.5A). Automated desulfation & float maintenance ensures full capacity retention during off-season winter storage.

Recommended Parts: Yuasa YTX14-BS High Performance AGM Battery • OptiMate 4 Quad Program 1.0A Smart Battery Tender / Charger

Shop Smart Battery Chargers Find Direct-Fit Batteries

IGNITION ENGINEERING, HEAT-RANGES & COMBUSTION DIAGNOSTICS

OEM Spark Plugs • Heat-Range Dissipation • Coil Resistance • Visual Combustion Reading Matrix

FACTORY CERTIFIED SPECIFICATIONS

Factory Standard Plug

NGK LMAR8D-J

4 Plugs Total (ShiftCam Dual-Spark: 2 Main + 2 Aux)

Electrode Spark Gap

0.8 - 0.9 mm (0.031 - 0.035 in)

M10 x 1.0 • 26.5 mm Reach

Hex Drive & Socket Spec

14 mm Bi-Hex (Thin-Wall)

Use magnetic rubber-insert thin socket

Tightening Torque (NM)

12 N·m

1/2 turn after finger seat (gasket crush)

Stick Coil Resistances

Pri: 0.85 - 1.15 Ω at 20°C

Sec: 11.2 - 14.5 kΩ at 20°C

Service & Replacement

Inspect: 12,000 miles (20,000 km)

Replace: 24,000 miles (40,000 km)

SPARK PLUG HEAT-RANGE & METALLURGY SELECTOR

Compare OEM standard, fine-wire precious metals, and ambient/duty cycle thermal dissipation paths

Verified Part Specification

NGK LMAR8D-J

FACTORY SPECIFICATION

Metallurgy & Center Tip Architecture

Copper Core / Solid Nickel Alloy Ground Electrode

Thermal Dissipation Path & Physics

Standard OEM factory thermal dissipation rate. Calibrated to stabilize ceramic nose temperature between 500°C–800°C across mixed street, highway, and mountain riding.

Operating Application Envelope

Stock engines, factory ECU mapping, general commuting, and standard touring. Recommended for all baseline maintenance schedules.

Ignitability & Coil Voltage Demand

Standard spark kernel size. Standard secondary coil demand (~15–20 kV). Solid copper core ensures rapid heat conduction away from tip.

SPARK PLUG READING & COMBUSTION DIAGNOSTICS ANALYZER

Interactive visual diagnosis: Match your ceramic insulator tip and electrodes to detect AFR, timing, oil intrusion, and thermal overload

Normal Clean — Optimal Combustion Equilibrium

OPTIMAL COMBUSTION

Thermal Operating Range: 500°C – 800°C (932°F – 1,472°F) • Self-Cleaning Pyrolysis Window

Visual Insulator & Electrode Profile

Ceramic insulator nose is light grayish-tan, beige, or light brown. Firing tip and electrodes are dry with minimal combustion deposits. Ground electrode edges remain crisp without rounding or erosion.

Multimeter Electrical Resistance Test

Insulation Resistance > 10 MΩ (Infinite DC resistance between center terminal and steel shell). Dielectric barrier is pristine; zero spark leakage to cylinder head ground.

Probable Root Causes

Optimal air/fuel ratio across all throttle positions (stoichiometric 14.7:1 cruise, 12.8:1–13.2:1 power enrichment)
Correct spark plug heat range precisely matched to engine displacement and cooling efficiency
Ignition timing and coil dwell saturation within factory parameters
Healthy piston rings and valve guide seals with minimal oil blow-by

Prescribed Workshop Remediation Action

No mechanical intervention required. Inspect gap with wire-style feeler gauge and reinstall to factory torque specification.

Coil-on-Plug (COP) / Stick Coil Multimeter Bench Testing Protocol

Step 1 • Primary Circuit

Set DMM to lowest Ω range. Probe between Terminal 1 (+12V switched) and Terminal 2 (ECU trigger pin). Normal reading: 0.85 - 1.15 Ω at 20°C at 20°C.

Step 2 • Secondary Circuit

Set DMM to kΩ range. Probe between Terminal 1 and the high-voltage spark plug spring terminal inside the boot. Factory spec: 11.2 - 14.5 kΩ at 20°C at 20°C.

Step 3 • Dielectric Boot Inspection

Flex silicone boot under bright light. Check for pinholes, white powdery dielectric breakdown tracks, or hardened silicone causing high-voltage flashover to the cylinder head spark plug tube.

Direct-Fit Ignition Components & Workshop Sockets

Authentic laser iridium plugs, thin-wall magnetic sockets, and OEM replacement stick coils

Find Direct-Fit Spark Plugs (NGK LMAR8D-J)

BMW Diagnostic Fault Codes & Multimeter Bench Testing

FI & OBD2 Decoder

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

Launch Full BMW DTC Engine→

Code P0105Manifold Absolute Pressure (MAP)

MAP sensor electrical circuit malfunction / range error.

Test: Verify 5.0V VRef and 2.5-3.0V signal key-on engine-off.

Code P0115Engine Coolant Temp (ECT)

ECT sensor circuit open, short, or out of plausible range.

Test: Measure NTC thermistor: ~2.5 kΩ at 20°C, 300 Ω at 80°C.

Code P0335Crankshaft Position Sensor (CKP)

CKP sensor electrical circuit or missing pulse teeth.

Test: Measure VR magnetic pickup coil resistance (typically 200-600 Ω).

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

2 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 2 safety recall campaigns associated with this platform. Independent repair shops and riders should confirm that authorized dealership warranty remedies have been applied.

NHTSA #20V495000EQUIPMENT:OTHER:LABELS

Received: 20/08/2020▼

Defect Description

BMW of North America, LLC (BMW) is recalling certain 2021 R 1250 RT, R 1250 R, R 1250 RS, R 1250 GS and R 1250 GS Adventure motorcycles. The tire pressure labels may not remain affixed to the motorcycle frame. As a result, these motorcycles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 120, "Wheels and Rims-Other Than Passenger Cars."

Safety Hazard / Consequence

If the label detaches from the motorcycle, proper tire pressure information may not be readily available. This could result in the rider improperly filling the tires which may affect motorcycle handling and control, increasing the risk of a crash.

Factory Remedy & Repair Action

BMW will notify owners, and dealers will replace the tire pressure label, free of charge. The recall began October 19, 2020. Owners may contact BMW customer service at 1-800-525-7417.

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 #23V011000POWER TRAIN:MANUAL TRANSMISSION:INTERNAL:SHAFT:INPUT

Received: 18/01/2023▼

OEM Workshop Archives

Official Factory Service Bulletins & Field Updates

2 Documented Bulletins

Bulletin #BMW-23V011Safety Recall SIB 23 01 23 & 33 01 20: R 1250 GS Gearbox Input Shaft Torsion & Paralever Pivot

Source: BMW_Recall23V011_RCRIT-23V011-2024.pdf

Mandated Torques:Torque: 100 N·m (74 lbf·ft) (Paralever Pivot Pin ISA Bolt - M12 x 1.5 x 80 with Loctite 2701)Torque: 56 N·m (41 lbf·ft) (Paralever Torque Reaction Strut to Bevel Gear Housing)Torque: 60 N·m (44 lbf·ft) (Rear Wheel 5x Lug Bolts - M10 x 1.25 Diagonal)Torque: 20 N·m (15 lbf·ft) (Bevel Gear Oil Filler / Drain Plugs)

Consumable Specs:BMW Hypoid Axle Oil G3 (75W-90, 180 ml)Loctite 2701 High-Strength Anaerobic Retainer (83 19 2 210 397)Staburags NBU 30 PTM Spline Grease

Genuine Part Numbers:07 12 9 907 07507 51 2 296 48683 19 2 210 39733 11 7 695 766

NHTSA Recall 23V-011 & 20V-165SIB 23 01 23 / SIB 33 01 20

R 1250 GS / GSA Gearbox Input Shaft & Paralever Rear Drive

DME engine management torsional shock absorption, Paralever final drive pivot pin torque (100 N·m), and bevel gear fluid specifications.

Federal Safety RemedyPivot Pin 100 N·m / Hypoid 180 ml

Click any element above for DME anti-shock software parameters, Paralever pivot pin replacement, and final drive fluid volumes.

Factory Tightening TorquesService Manual

Paralever Rear Drive Pivot Pin Bolt (M12 × 1.5 × 80)100 N·m (74 lb-ft)

ISA bolt with high-strength Loctite 2701 (Recall 20V-165)

Paralever Torque Reaction Strut to Bevel Gear56 N·m (41 lb-ft)

M10 bolt securing reaction arm to final drive housing

Rear Wheel Lug Bolts (5x M10 × 1.25)60 N·m (44 lb-ft)

Torque in diagonal cross-pattern with wheel on ground

Final Drive Bevel Gear Oil Filler Plug (M12 × 1.5)20 N·m (15 lb-ft)

Replace O-ring (11.2 × 1.8 mm); refill 180 ml Hypoid Axle Oil G3

Final Drive Bevel Gear Oil Drain Plug20 N·m (15 lb-ft)

Clean magnetic tip of metallic wear debris

Swinging Arm Pivot Pin Left (Fixed Bearing)100 N·m (74 lb-ft)

Pivot bearing pin on frame main spar

Bulletin #BMW-20V476Safety Recall SIB 34 03 21: R 1250 GS & S 1000 RR Front Brake Caliper Fluid Weepage Check

Source: BMW_Recall20V476_RCRIT-20V476-8248.pdf

Mandated Torques:Torque: 38 N·m (28 lbf·ft) (Front Radial Brake Caliper Mounting Bolts - 4x M10 x 65)Torque: 24 N·m (17.7 lbf·ft) (Brake Hose Union Banjo Bolt - New Sealing Washers)Torque: 10 N·m (7.4 lbf·ft) (Caliper Air Bleeder Valve)Torque: 19 N·m (14 lbf·ft) (Front Brake Rotor Torx Screws - 5x M8)

Consumable Specs:BMW Motorrad DOT 4 Brake Fluid (83 13 2 405 977)Genuine Sealing Washers A10 x 13.5 (07 11 9 963 072)Isopropyl Alcohol Contact Cleaner

Genuine Part Numbers:34 11 7 105 63734 11 7 105 63883 13 2 405 97707 11 9 963 072

NHTSA Recall 20V-476SIB 34 03 21 / SIB 34 02 21