Oil and filter change
≈ 8,000 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]Street Bob (2018) · 2021–…
Harley-Davidson Street Bob (2018) 114 · 94 hp (2021 to date)
The Harley-Davidson Street Bob (2018) 114 uses the Harley Milwaukee-Eight 114 petrol engine with 94 hp.
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Technical specifications
- Fuel
- Petrol
- Power
- 94 PS / 69 kW
- Displacement
- 1 868 cm³
- Cylinders
- 2
- Engine code
- Harley Milwaukee-Eight 114
- 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
94 hp (69 kW), belt final drive, 6-speed manual. Built from 2021 to date.
AutoKarnet advice
In the range
It is the most powerful petrol version of this generation. The Harley Milwaukee-Eight 114 engine is also fitted to: Harley-Davidson Fat Boy (Fat Boy (2018)), Harley-Davidson Street Glide (Street Glide (2017)).
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 Street Bob (2018) pages, the 107 87 hp offers a comparison: 87 hp (64 kW), Harley Milwaukee-Eight 107, 1 746 cm³, 6-speed manual, 2018–2020. The version on this page has 94 hp (69 kW), Harley Milwaukee-Eight 114, 1 868 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]Final drive belt
≈ 16,000 km
Check the tension, cuts and teeth at each service; a trapped stone can cut it. No lubrication: the belt is cleaned with water.
Source [1]Spark plugs
Every 48,000 km
Replace the full set; worn plugs raise consumption and cause misfires.
Source [1]Air filter
Every 16,000 km
Replace more often in dusty conditions.
Source [1]Questions about this version (3)
Which engine is in the Harley-Davidson Street Bob (2018) 114?
The Harley Milwaukee-Eight 114 petrol engine (1 868 cc), 94 hp (69 kW).
AutoKarnet advice
Which oil for the Harley-Davidson Street Bob 114?
A JASO MA2 10W-40 four-stroke motorcycle oil suited to the Harley Milwaukee-Eight 114 engine.
AutoKarnet advice
How do I check this page matches my car?
This page covers Harley-Davidson Street Bob (2018) 114 94 hp, cruiser, from 2021, with 94 hp (69 kW), Harley Milwaukee-Eight 114, 1 868 cm³, 6-speed manual, from 2021. Compare these details with the registration document and gearbox identification. The designation Harley Milwaukee-Eight 114 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