2019 Harley-Davidson FLHXS Street Glide Special — Maintenance & Ownership Guide
Routine Maintenance
Key maintenance tasks to keep your 2019 Harley-Davidson FLHXS Street Glide Special running reliably.
Oil Service
Requires approximately 5.2 quarts of 20W-50 oil. Intervals are every 5,000 miles, but many owners prefer 2,500-3,000 miles to monitor for sumping.
Primary & Transmission Fluid
Primary takes approx 1.1 qt; Transmission takes approx 1.0 qt. Critical to check for 'oil transfer' between these two sumps.
Brake Fluid Flush
Harley-Davidson specifies a flush every 2 years regardless of mileage to prevent ABS module failure due to moisture.
Common Wear Items
Parts that wear over time on the 2019 Harley-Davidson FLHXS Street Glide Special and should be inspected regularly.
Rear Tire
The high torque and 800+ lb weight lead to rapid rear tire wear, often requiring replacement every 7,000-10,000 miles.
Brake Pads
Heavy touring use wears front pads quickly; check thickness every 2,500 miles.
Drive Belt
Inspect for debris damage or 'stone pecking' which can lead to belt snaps under high torque.
Popular Upgrades
The most popular aftermarket upgrades for the 2019 Harley-Davidson FLHXS Street Glide Special.
Stage 1 Performance
High-flow air cleaner and slip-on mufflers are standard first steps to improve the exhaust note and heat management.
Rear Suspension
The stock 12-inch emulsion shocks have limited travel; upgrading to 13-inch shocks (Ohlins, Legend, or Bitubo) significantly improves ride quality.
Common Replacement Parts
Parts that commonly need replacing on the 2019 Harley-Davidson FLHXS Street Glide Special.
Oil Pump
Early 2019 M8 engines often need the updated 2020+ oil pump (Part #62400247) to prevent sumping.
Primary Vent Kit
Added to resolve the vacuum issue that pulls oil from the transmission into the primary.
Used Buying Inspection Checklist
What to look for when buying a used 2019 Harley-Davidson FLHXS Street Glide Special.
Transmission Oil Level
Check if the level is low; if so, check the primary level. This indicates the 'oil transfer' issue.
Air Cleaner Housing
Look for excessive oil pooling in the intake, which is a symptom of oil sumping or 'breather carryover'.
Service Records for TSBs
Confirm if TSB M1450 (oil pump) or the primary vent kit has been installed.
Steering Neck Bearings
Check for 'notching' or play; these heavy bikes put significant stress on the neck bearings.
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