🔧 2024 KTM 390 Duke Chain Lubrication & Adjustment

Overview

The 2024 KTM 390 Duke requires chain lubrication & adjustment every 500–1,000 miles or after every ride in rain. Regular chain lube maintenance extends engine life and maintains peak performance. This guide covers the complete procedure for both DIY mechanics and those seeking shop estimates.

Tools Needed

Supplies Needed

Step-by-Step Procedure

1. 1
   Elevate the rear wheel using a paddock stand or center stand.
2. 2
   Clean the chain with a dedicated chain cleaner and brush. Remove all grit and old lube.
3. 3
   Let the chain dry completely (5–10 minutes).
4. 4
   Apply chain lubricant to the inner side of the chain (where it contacts the sprocket) while slowly rotating the rear wheel.
5. 5
   Wipe off excess lubricant with a rag to prevent fling onto the tire.
6. 6
   Check chain slack: with your finger at the midpoint of the lower run, slack should be 25–35mm (1.0–1.4 inches) — check your manual.
7. 7
   If slack is excessive, loosen the rear axle nut.
8. 8
   Adjust both chain adjusters equally to maintain wheel alignment.
9. 9
   Tighten the rear axle nut to spec (typically 80–120 Nm).
10. 10
    Recheck slack and alignment. Spin the wheel to verify smooth chain movement.