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Dedicated Subsystem WorkbenchPlatform Gen: 2020–2024

2021 KTM 390 Adventure Oil Capacities, Coolant & Fluid Specifications

Verified fluid capacities for 2021 KTM 390 Adventure: engine oil 1.60 L (1.70 US qt), viscosity Motorex Formula 4T SAE 15W-50 (JASO MA2), coolant 1.00 L (1.06 US qt), brake fluid, and fork oil levels.

Technical PassportOEM VERIFIED
Engine
373cc
Cooling
Not Available
Final Drive
520 Chain
Engine Oil
1.60 L (1.70 US qt)
Spark Plug
Bosch VR 5 NEU / NGK LKAR8AI-9
Front Tire
100/90-19 M/C 57H TL
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Gen 2020–2024

Factory Platform Compatibility: All workshop fluid capacities, maintenance milestones, torque specifications, and consumables on this specification sheet are factory-identical across model years 2020 through 2024.

SPECS-TO-CART BUNDLESFactory Direct-Fit Maintenance Bundles Available
1-Click verified Motul engine oil service kits, race filters, spark plugs, and brake fluid pre-measured for this 2021 KTM 390 Adventure.
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Select Model Year:(Active: 2021)
5 Production Years (2020–2024)
Suggested Items4 Verified Workshop Consumables Available for this Job
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Fluids & Service Capacities
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Engine Oil (Drain & Filter Change)1.60 L (1.70 US qt)
Engine Oil (Drain Only)1.40 L (1.48 US qt)
Recommended Oil ViscosityMotorex Formula 4T SAE 15W-50 (JASO MA2)
Coolant System Capacity1.00 L (1.06 US qt)
Brake Fluid StandardDOT 4 / DOT 5.1
Drivetrain, Chain & Gearing
Drive Chain Pitch520
Chain Link CountN/A
Front Sprocket TeethN/A
Rear Sprocket TeethN/A
Final Drive Configuration520 Pitch Chain
Ignition & Electrical Specifications
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OEM Spark Plug Part NumberBosch VR 5 NEU / NGK LKAR8AI-9
Electrode Spark Plug Gap0.8 - 0.9 mm (0.031 - 0.035 in)
OEM Battery Reference CodeETZ-9 (12V 8Ah AGM)
Battery Output & RatingNot Available
Spark Plug Inspection IntervalN/A
Wheels, Tires & Inflation Pressures
Front Tire Dimensions100/90-19 M/C 57H TL
Cold Front Inflation PressureN/A
Rear Tire Dimensions130/80-17 M/C 65H TL
Cold Rear Inflation PressureN/A
OEM Wheel Rim Widths (F / R)3.50" / 5.50"
Verified OEM Wheel Fitment: 100/90-19 (F) + 130/80-17 (R)
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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 2021 KTM 390 Adventure 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

1 Documented Bulletin
Bulletin #KTM-25V598Safety Recall KTB2606 / HTB2603: Sealed E-Throttle Twist Grip Assembly & Adaptation Reset
Source: KTM_Recall25V598_RCRIT-25V598-9541.pdf
Mandated Torques:E-Throttle Housing Clamp Screws (2x M4): 3.5 N·m (31 in-lb)Handlebar End Weight Screw (M6): 20 N·m (15 lb-ft)Handlebar Switchgear Screws (M4): 2.0 N·m (18 in-lb)Front Brake Master Cylinder Clamp (M6): 5 N·m (44 in-lb)
Consumable Specs:N/A
Genuine Part Numbers:Exchange Throttle Cmpl. (390 Adv / Duke / 401) (95802010044)Exchange Switch Control RH (RC 390) (94811074000)EJOT PT Screw K40×12 (0081040121)Handlebar Grip Right (90102021000)
NHTSA Recall 25V-598 & 26V-196Bulletins KTB2606 & HTB2603

KTM 390 & Husqvarna 401 Weather-Sealed E-Throttle Twist Grip Assembly

Ride-by-wire electronic twist grip IP67 sealing countermeasure, locator pin engagement, and XC-2 adaptation reset.

Safety Recall RemedyHousing 3.5 N·m / Bar End 20 N·m
Genuine Part Numbers:9580201004494811074000008104012190102021000
22.2mm HANDLEBAR TUBELOCATOR HOLEIP67 SENSORHall Dual-ChannelTWIST GRIP TUBEBAR END1.5–2.0 mm GAP6-PIN PLUGHOUSING CLAMP SCREWS (2x)3.5 N·m (31 in-lb)Torx T20 into Locator PinBAR END WEIGHT SCREW20 N·m (15 lb-ft)Maintain 1.5–2.0mm GapCOUNTERMEASURE E-THROTTLEWaterproof IP67 Internal SealingPart: 95802010044

Click any component or torque callout above to inspect e-throttle waterproofing details, bar end clearance, and XC-2 adaptation reset.

1-Click Factory Service KitOEM Spec Fluid Capacities Matched

Workshop Maintenance Kit & Factory Fluids

Authentic factory-grade motor oil, oil filter, and high-temp brake fluid matched precisely to 2021 KTM 390 Adventure capacities.

Full Kit Subtotal
$74.50
SPECS-TO-CART BUNDLESDedicated Direct-Fit Maintenance Bundles Available
Explore interactive 1-click oil change packs, brake flush kits & major tune-up bundles pre-measured for this 2021 KTM 390 Adventure.
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Silkolene Pro 4 4T Synthetic Oil 15W-50 (4 Liter)
15W-50 JASO MA2

Silkolene Pro 4 4T Synthetic Oil 15W-50 (4 Liter)

4-Liter Factory Full Jug
Matches factory 15W-50 spec (Oil spec: 1.60 L (1.70 US qt))
Item Price
$68.95
EBC High-Performance DOT 4 Synthetic Brake Fluid
DOT 4 Synthetic Formula

EBC High-Performance DOT 4 Synthetic Brake Fluid

8.8 oz (250 ml) Workshop Bottle
Meets & exceeds factory DOT 4 / DOT 5.1 specifications
Item Price
$5.55
Factory OEM Spark Plug Spec

Bosch VR 5 NEU / NGK LKAR8AI-9

Gap: 0.8 - 0.9 mm (0.031 - 0.035 in)
Inspection milestone: Not Available. Exact factory part specification.
Authentic OEM Reference
Search OEM Plugs →
Complete Workshop Maintenance Package3 Essential Service Items
Includes 15W-50 JASO MA2 engine oil (4-Liter Factory Full Jug), high-flow filter & DOT 4 fluid.
Kit Total
$74.50

Explore Other Subsystems for this 2021 KTM 390 Adventure

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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/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: ETZ-9 (12V 8Ah AGM)

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Subsystem Guide/tires

Tires & Gearing

Front: 100/90-19 M/C 57H TL • Rear: 130/80-17 M/C 65H TL

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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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