Factory Workshop SpecificationsPlatform Gen: 2017–2026

2026 Triumph Bonneville T100 / Street Twin / Speed Twin 900 Specifications & Consumables

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

Gen 2017–2026

Factory Platform Compatibility: All workshop fluid capacities, maintenance milestones, torque specifications, and consumables on this specification sheet are factory-identical across model years 2017 through 2026.

Select Model Year:(Active: 2026)

2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Engine

900cc

Drive

520

Cooling

Liquid-Cooled

Engineering Subsystem Workbenches & Calculators

Dedicated deep-dive diagnostic tools, torque matrices, wiring pinouts, and calculators tailored for 2026 Triumph Bonneville T100 / Street Twin / Speed Twin 900.

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: 3.20 L (3.38 US qt) • Coolant: 1.70 L (1.80 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 (T100) / 100/90-18 (Street Twin) • Rear: 150/70 R17

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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

Shop Fluids →

Engine Oil (Drain & Filter Change)3.20 L (3.38 US qt)

Engine Oil (Drain Only)2.80 L (2.96 US qt)

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

Coolant System Capacity1.70 L (1.80 US qt)

Brake Fluid StandardDOT 4

Drivetrain, Chain & Gearing

Gearing Calculator →Shop Chains & Sprockets →

Drive Chain Pitch520

Chain Link Count102 Links

Front Sprocket Teeth17T

Rear Sprocket Teeth41T

Final Drive Configuration520 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 (T100) / 100/90-18 (Street Twin)

Cold Front Inflation PressureN/A

Rear Tire Dimensions150/70 R17

Cold Rear Inflation PressureN/A

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

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 2026 Triumph Bonneville T100 / Street Twin / Speed Twin 900 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

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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