Spark plugs require inspection and replacement at specific mileage intervals. Refer to
Maintenance Scheduling → Regular Service Intervals: Buell Models → Regular Service Intervals: 2005 XB Models
.
See a Buell dealer or service manual for details. Refer to
Specifications → Specifications: 2005 Firebolt Models → Ignition System: 2005 XB Models
for ignition specifications.