| Component | Specification |
|---|---|
| Engine | Milwaukee-Eight 107 (1745cc) |
| Production Years | 2017 – 2019 |
| Engine Oil | SAE 20W50 (3.8 L) |
| Front Tire | 130/80B17 65H |
| Rear Tire | 180/65B16 81H |
| Tire Pressure (F/R) | 36 psi / 40 psi (2.5 / 2.8 bar) |
| Battery | 66010-97D |
| Spark Plug | HD 60100010 |
The 2017 Harley-Davidson Road Glide Ultra (FLTRU) represents a pivotal moment in the Motor Company’s history: it was the first year the frame-mounted Sharknose touring platform was paired with the Milwaukee-Eight (M8) 107 engine. Unlike the Batwing fairing used on the Ultra Limited, the Road Glide’s Sharknose is mounted directly to the frame, which significantly reduces aerodynamic drag and handlebar buffeting by isolating the steering geometry from wind forces.
Engineering Highlight: The Milwaukee-Eight Transition
The 2017 FLTRU marked the departure from the Twin Cam architecture. The M8 engine introduced a four-valve cylinder head design and dual spark plugs per cylinder, offering 10% more torque and improved heat management. For the Road Glide Ultra, this meant a more refined touring experience, especially when navigating heavy crosswinds where the frame-mounted fairing shines.
Maintenance Essentials
To maintain peak performance of the 107 CUI powertrain, adherence to strict lubrication and electrical standards is required. The system utilizes 3.8 Liters of SAE 20W50 oil, which serves both as a lubricant and a critical cooling medium for the M8’s precision-machined internals.
Electrical & Ignition
The FLTRU/17 utilizes the 66010-97D battery, a high-CCA (Cold Cranking Amps) unit necessary to turn over the high-compression 1745cc V-Twin. Spark delivery is managed by HD 60100010 plugs, which should be inspected for carbon fouling at every major service interval to ensure the M8’s dual-ignition system remains synchronized.
Chassis & Tires
Handling a bike with a wet weight exceeding 900 lbs requires precise tire pressure management. The Dunlop multi-tread tires must be kept at 36 psi (Front) and 40 psi (Rear). Under-inflation leads to rapid cupping on the front 130/80B17 tire and compromised stability on the rear 180/65B16 during heavy touring loads.
MotoSpecsLab Verdict
The 2017-2019 Road Glide Ultra is the gold standard for long-distance stability. Its engineering focus on aerodynamic isolation and the torque-rich M8 engine makes it a premier choice for transcontinental travel, provided the owner maintains the specific fluid and electrical requirements outlined in this guide.