Oil and filter change
≈ 16,000 km or 1 year
JASO MA or MA2 approved four-stroke motorcycle oil (JASO MB on scooters): an “energy conserving” car oil makes the wet clutch slip. Change it more often in city use or on track.
Source [1]Bonneville T120 · 2021–…
Triumph Bonneville T120 1200 · 79 hp (2021 to date)
The Triumph Bonneville T120 1200 uses the Triumph 1200 HT petrol engine with 79 hp.
Choose an engine
Identify the car and prepare its maintenance
Download the service plan (PDF)
Compare with another version
Technical specifications
- Fuel
- Petrol
- Power
- 79 PS / 58 kW
- Displacement
- 1 200 cm³
- Cylinders
- 2
- Engine code
- Triumph 1200 HT
- Period covered
- 2021–…
- Documented market
- Europe
Transmission
- Manual · 6 speeds
Figures apply to the cited configuration and market; equipment and transmissions may vary by production date.
Specification source : [1] AutoKarnet
This version
79 hp (58 kW), chain final drive, 6-speed manual. Built from 2021 to date.
AutoKarnet advice
In the range
It is the entry-level petrol version of this generation. It replaces the 80 hp version built until 2020.
AutoKarnet advice
Body style and inspection points
On a motorcycle, tyres, final drive and brakes matter as much as the oil change. Check the tyre manufacturing date, steering-head play and fork-tube seals; an oil film on a tube means a fork seal needs replacing. A notched steering bearing can be felt when braking at low speed.
AutoKarnet advice
Distinguishing similar versions
Among the Bonneville T120 pages, the 1200 80 hp offers a comparison: 80 hp (59 kW), Triumph 1200 HT, 1 200 cm³, 6-speed manual, 2016–2020. The version on this page has 79 hp (58 kW), Triumph 1200 HT, 1 200 cm³, 6-speed manual, from 2021. When requesting a quote, specify the output and gearbox; the marketing name alone does not identify the correct parts.
AutoKarnet advice
Maintenance and records
≈: estimated reference — the vehicle’s service indicator prevails.
Brake fluid
Every 2 years
Replace the fluid in both circuits (and the hydraulic clutch if fitted), whatever the mileage; dark fluid has absorbed moisture.
Source [1]Fork oil
≈ 30,000 km
Fork oil change and seal check; an oil film on the tubes means a seal needs replacing before it contaminates the brake caliper.
Source [1]Chain kit (chain and sprockets)
≈ 25,000 km
Lubricate and check the tension every 500 to 1,000 km and after rain; replace chain and sprockets together when the chain no longer holds its tension or the teeth are hooked.
Source [1]Spark plugs
Every 32,000 km
Replace the full set; worn plugs raise consumption and cause misfires.
Source [1]Air filter
Every 32,000 km
Replace more often in dusty conditions.
Source [1]Valve clearance
Every 32,000 km
Check and adjust if needed, often together with the plugs; too little clearance burns the valves, too much makes the engine noisy.
Source [1]Coolant
Every 3 years
Replace the coolant and check the hoses and radiator; check the level cold between services.
Source [1]Questions about this version (3)
Which engine is in the Triumph Bonneville T120 1200?
The Triumph 1200 HT petrol engine (1 200 cc), 79 hp (58 kW).
AutoKarnet advice
Which oil for the Triumph Bonneville T120 1200?
A JASO MA2 10W-40 four-stroke motorcycle oil suited to the Triumph 1200 HT engine.
AutoKarnet advice
How do I check this page matches my car?
This page covers Triumph Bonneville T120 1200 79 hp, retro bike, from 2021, with 79 hp (58 kW), Triumph 1200 HT, 1 200 cm³, 6-speed manual, from 2021. Compare these details with the registration document and gearbox identification. The designation Triumph 1200 HT may cover several revisions: a VIN is still needed to confirm part numbers.
AutoKarnet advice
Documentary sources
- [1] Rédaction AutoKarnet
AutoKarnet · FR · Europe · Synthèse éditoriale AutoKarnet · Accessed 09/10/2026