01
Conventions
02
Safety
03
Notes
04
Vehicle
05
Serial #
06
Controls
07
Instrument
08
Ergonomics
09
Startup
10
Riding
11
Service
12
Tuning
13
Chassis
14
Brakes
15
Wheels
16
Electrics
17–19
Engine
20–21
Storage
22
Diagnose
23
Specs
React Native reference: Each section maps to a FlatList of data rows, with the stat grid using a 2-column FlexBox layout.
Engine at a Glance
Displacement
398
cm³
Bore × Stroke
89×64
mm
Compression
12.59
:1
Idle Speed
1,600
rpm ±50
Fuel Tank
14
litres (3.7 gal)
Reserve
2
litres (0.5 gal)
Weight (dry)
165
kg (363.8 lb)
Seat Height
871
mm (34.3 in)
Tire Pressure (cold)
Solo riding
Front
29.0
90/90-21 M/C 54T
Mitas Enduro Trail+
Mitas Enduro Trail+
Rear
29.0
140/80-18 M/C 70T
Mitas Enduro Trail+
Mitas Enduro Trail+
With passenger / full payload
Front
29.0
Rear
31.9
Fluids & Capacities
| Engine oil (SAE 15W/50) | 1.7 l (0.45 gal) |
| Coolant (antifreeze to −25°C) | 1.2 l (0.32 gal) |
| Fork oil per leg (SAE 5) | 500 ±5 ml |
| Brake fluid | DOT 4 / DOT 5.1 |
| Fuel type | Super Unleaded ROZ 95+ |
| Shock absorber oil (SAE 2.5) | Fill to half-full |
Wear Limits
| Min. tire tread depth | ≥ 2 mm (0.08 in) |
| Tire max. age | 5 years |
| Min. brake pad thickness | ≥ 1 mm (0.04 in) |
| Brake disc wear limit (front) | 4.5 mm (0.177 in) |
| Brake disc wear limit (rear) | 4.5 mm (0.177 in) |
| Brake pedal free travel | 3–5 mm (0.12–0.20 in) |
| Rear hub damper play max. | ≤ 5 mm (0.20 in) |
| Run-in distance (new tires) | 200 km (124 mi) |
| New tire lean-in distance | Gradual — moderate speed |
Valve Clearance (cold)
| Intake | 0.10–0.15 mm |
| Exhaust | 0.15–0.20 mm |
| Spark plug (Bosch VR6NEU) | Gap: 1.0 mm |
| Spark plug torque | 16 Nm (11.8 ft·lb) |
Suspension — Factory Settings
| Fork type | WP APEX 3343 |
| Fork spring rate | 5.5 N/mm (31.4 lb/in) |
| Fork compression (std.) | 15 clicks from full CW |
| Fork rebound (std.) | 15 clicks from full CW |
| Shock type | WP APEX 3446 |
| Shock spring rate | 105 N/mm · rider 75–85 kg |
| Shock preload (std.) | 8 mm (0.31 in) |
| Shock rebound (std.) | 15 clicks from full CW |
| Static sag | 28.5 mm (1.12 in) |
| Riding sag | 78 mm (3.07 in) |
| Suspension travel — front | 229 mm (9.02 in) |
| Suspension travel — rear | 230 mm (9.06 in) |
Critical Tightening Torques
Always use Loctite® where specified. Do not re-use threadlocker — clean threads first.
Front wheel spindleM2445 Nm
Rear wheel spindle nutM16100 Nm
Rear sprocket nutM834 Nm
Swingarm pivot nutM14×1.5100 Nm
Front brake caliper screwM8 + L24330 Nm
Front brake disc screwM830 Nm
Rear brake disc screwM830 Nm
Handlebar clamp screwM820 Nm
Handlebar mount screwM1045 Nm
Top triple clamp screwM817 Nm
Bottom triple clamp screwM812 Nm
Fork shoe screwM815 Nm
Top shock absorber screwM10 + L270150 Nm
Bottom shock absorberM10 + L270150 Nm
Subframe top screwM10 + L270145 Nm
Subframe bottom screwM10 + L270145 Nm
Side stand fittingM10 + L24332 Nm
Cylinder head screwM10×1.2562 Nm
Rotor screwM12×1.5125 Nm
Primary gear nutM16×1.5136 Nm
Inner clutch hub nutM16LH×1.5119 Nm
Spark plugM12×1.2516 Nm
Spoke nippleM54.5 Nm
Banjo bolt (brake line)M1024 Nm
Steering head top screwM16×1.553 Nm
Battery & Electrics
| Battery type | ETZ-9-BS (12V, 8Ah) |
| Alternator | 12V / 230W |
| Headlight / DRL / signals | All LED |
| Fuse sizes available | 10A · 15A · 25A · 30A |
Key Safety Reminders
Never tow this vehicle with wheels on the ground — always use a trailer or transport vehicle.
Do not operate with a discharged or missing 12V battery — electrical components and safety devices can be damaged.
If coolant temp warning appears — stop immediately, do not endanger others. Let engine cool before checking coolant.
ABS warning lamp on while riding = ABS not active. Wheels may lock. Stop safely and contact KTM workshop.
Kill switch is for emergencies only. Always use ignition key to switch off engine — leaving ignition on discharges battery.
React Native reference: Odometer input → AsyncStorage. Checklist state → AsyncStorage or SQLite.
Interval tabs → state-driven filter on a single task array.
Service Tracker
2025 KTM 390 Adventure R · Item 3240182en
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