Factory Workshop SpecificationsPlatform Gen: 2016–2026

2026 Triumph Bonneville T120 / Black / Speed Twin 1200 / Thruxton Specifications & Consumables

Official workshop technical reference: fluid capacities, spark plug codes, drive chain specs, and tire inflation pressures.

Gen 2016–2026

Factory Platform Compatibility: All workshop fluid capacities, maintenance milestones, torque specifications, and consumables on this specification sheet are factory-identical across model years 2016 through 2026.

Select Model Year:(Active: 2026)

2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Engine

1200cc

Drive

525

Cooling

Liquid-Cooled

Engineering Subsystem Workbenches & Calculators

Dedicated deep-dive diagnostic tools, torque matrices, wiring pinouts, and calculators tailored for 2026 Triumph Bonneville T120 / Black / Speed Twin 1200 / Thruxton.

10 Dedicated Engineering Spoke Pages

Subsystem Guide/torques

Fastener Torques

Engine drain plug, axle spindles, caliper mounts, triple clamp pinch bolts & thread lubrication derating guide.

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Subsystem Guide/fluids

Fluids & Capacities

Oil: 3.80 L (4.02 US qt) • Coolant: 1.80 L (1.90 US qt) • Brake: DOT 4

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Subsystem Guide/fuses-relays

Fuses & Relays

Main: N/A • Location: N/A

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Subsystem Guide/compression

Compression & Leakdown

Ratio: N/A

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Subsystem Guide/valves

Valve Clearances

Intake: N/A mm • Exhaust: N/A mm

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Subsystem Guide/fuel-delivery

Fuel Delivery & TB Sync

Idle: N/A • Rail Pressure: N/A • Vacuum: N/A

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Subsystem Guide/electrical

Charging & Battery

Battery: YTX12-BS (12V 10Ah)

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Subsystem Guide/tires

Tires & Gearing

Front: 100/90-18 (T120) / 120/70 ZR17 (Speed Twin) • Rear: 150/70 R17 (T120) / 160/60 ZR17 (Speed Twin)

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Subsystem Guide/suspension

Suspension & Sag

Front Travel: N/A • Rear Travel: N/A

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Subsystem Guide/maintenance

Maintenance Schedule

Oil: N/A • Valves: N/A • Plugs: N/A

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Fluids & Service Capacities

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Engine Oil (Drain & Filter Change)3.80 L (4.02 US qt)

Engine Oil (Drain Only)3.40 L (3.60 US qt)

Recommended Oil ViscosityCastrol Power1 4T 10W-40 / 10W-50 Semi/Fully Synthetic, JASO MA2

Coolant System Capacity1.80 L (1.90 US qt)

Brake Fluid StandardDOT 4

Drivetrain, Chain & Gearing

Gearing Calculator →Shop Chains & Sprockets →

Drive Chain Pitch525

Chain Link Count102 Links

Front Sprocket Teeth17T

Rear Sprocket Teeth37T

Final Drive Configuration525 Pitch Chain

Ignition & Electrical Specifications

Shop Plugs & Batteries →

OEM Spark Plug Part NumberNGK LMAR8A-9

Electrode Spark Plug Gap0.8–0.9 mm (0.031–0.035 in)

OEM Battery Reference CodeYTX12-BS (12V 10Ah)

Battery Output & RatingNot Available

Spark Plug Inspection IntervalN/A

Wheels, Tires & Inflation Pressures

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Front Tire Dimensions100/90-18 (T120) / 120/70 ZR17 (Speed Twin)

Cold Front Inflation PressureN/A

Rear Tire Dimensions150/70 R17 (T120) / 160/60 ZR17 (Speed Twin)

Cold Rear Inflation PressureN/A

OEM Wheel Rim Widths (F / R)3.50" / 5.50"

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 #24V785000ELECTRICAL SYSTEM:WIRING:CONNECTORS/PLUGS/RECEPTACLES

Received: 21/10/2024▼

Defect Description

Triumph Motorcycles America, Ltd. (Triumph) is recalling certain 2022-2024 Bonneville T100, T120, T120 Black, 2022 Triumph Street Scrambler, Street Scrambler Sandstorm, Street Twin, Street Twin Goldline, 2023-2024 Scrambler 900, and Speed Twin 900 motorcycles. The wiring between the alternator and main harness connector may short circuit and overheat.

Safety Hazard / Consequence

Overheated wiring increases the risk of a fire or crash.

Factory Remedy & Repair Action

Dealers will install a new wire alignment clip, free of charge. Owner notification letters were mailed November 18, 2024. Owners may contact Triumph customer service at 1-678-854-2010. Triumph's number for this recall is SRAN 627.

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 nhtsa.gov.

NHTSA #26V078000ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR

Received: 11/02/2026▼

OEM Workshop Archives

Official Factory Service Bulletins & Field Updates

2 Documented Bulletins

Bulletin #SRAN-560Safety Recall 19V-133 / SRAN 560: Bonneville T120 / T100 / Street Twin Steering Headstock Tidy & Clutch Cable Routing

Source: RCLRPT-19V133-9239.pdf

Mandated Torques:Headstock Tidy Cable Guide Screws (2x M5): 3 N·m (27 in-lb)Handlebar Upper Riser Clamp Bolts (4x M8): 26 N·m (19.2 lb-ft) (Front bolts tightened first to ZERO GAP)Headlamp Bowl Mounting Bracket Screws: 7 N·m (62 in-lb)Clutch Lever Pivot Bolt: 3 N·m (27 in-lb) / Locknut: 6 N·m (53 in-lb)

Consumable Specs:Coroplast High-Adhesion Anti-Abrasion Textile Harness TapeMolybdenum Disulfide Cable LubricantCorrugated Flame-Retardant Wire Conduit Sheath

Genuine Part Numbers:T2070054 (Countermeasure Headstock Tidy Bracket - Left)T2070055 (Countermeasure Headstock Tidy Bracket - Right)T3010114 (Coroplast Protective Sheath Wrap)T3020058 (Guide Fasteners M5)

NHTSA Recall 19V-133Triumph Campaign SRAN 560

Triumph Bonneville T120 / T100 / Street Twin Steering Headstock Tidy & Clutch Cable Routing

Electrical short-circuit countermeasure: Replacement headstock tidy bracket (T2070054), harness separation, and handlebar clamp sequence (26 N·m).

CLICK ANY ROUTING COMPONENT TO VIEW ANTI-CHAFING BRACKET SPECIFICATIONS AND HANDLEBAR CLAMP TORQUES

Select a component above to inspect headstock tidy replacement hardware, wiring sheath repairs, and handlebar riser clamp sequence.

Bulletin #SRAN-641Safety Recall 24V-785 / SRAN 641: Bonneville T120 / T100 / Speed Twin 900 Alternator to Regulator Connector Thermal Relief

Source: RCLRPT-24V785-3629.pdf

Mandated Torques:Regulator/Rectifier Frame Mounting Screws: 7 N·m (62 in-lb)Left Engine Alternator Cover Bolts: 9 N·m (80 in-lb) (diagonal pattern)Battery Ground Cable Terminal Stud: 4.5 N·m (40 in-lb)

Consumable Specs:DeoxIT High-Conductivity Contact Lubricant & SealantCoroplast High-Temperature Wiring TapeAlternator Cover Gasket (T1260262)

Genuine Part Numbers:T2500412 (Alternator Terminal Wire Alignment Clip Kit)T2500415 (Sealed 3-Pin Alternator Output Connector)T1260262 (Alternator Casing Gasket)

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