🔧 2021 BMW R1250GS Spark Plug Replacement

Overview

The 2021 BMW R1250GS requires spark plug replacement every 8,000–12,000 miles (standard) or 20,000–30,000 miles (iridium). Regular spark plugs 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
   Allow the engine to cool completely (minimum 30 minutes).
2. 2
   Remove the fuel tank, fairings, or panels as needed to access spark plugs.
3. 3
   Remove spark plug caps or ignition coils, labeling each if multiple cylinders.
4. 4
   Clean around the spark plug wells with compressed air to prevent debris falling in.
5. 5
   Remove old spark plugs with the spark plug socket.
6. 6
   Inspect old plugs: black/sooty = rich mixture, white = lean. Normal is light tan/gray.
7. 7
   Check the gap on new spark plugs against manufacturer spec (typically 0.6–0.9mm).
8. 8
   Apply a small amount of anti-seize to the threads (not the electrode).
9. 9
   Thread new plugs in by hand to avoid cross-threading, then torque to spec (12–20 Nm typically).
10. 10
    Apply dielectric grease to spark plug cap insides. Reinstall caps/coils, panels, and tank.