Engineering Highlight: The FLSTSE CVO Softail Convertible holds a unique place in Milwaukee history as the first CVO model to master the ‘two-in-one’ engineering philosophy. Utilizing a proprietary quick-release hardware system, the bike could be transformed from a long-haul touring machine with a fairing and leather-covered saddlebags into a clean-profiled cruiser in under two minutes, all without the use of tools.
| Component | Specification |
|---|---|
| Engine | Screamin’ Eagle Twin Cam 110B (1803cc) |
| Oil Type | Screamin’ Eagle SYN3 20W50 (3.3 L) |
| Front Tire | 130/70B18 63H |
| Rear Tire | 200/50R18 76V |
| Spark Plugs | HD 6R12 |
| Battery | 65989-97C |
Technical Review: The 110ci Powerhouse
At the heart of the FLSTSE is the Screamin’ Eagle Twin Cam 110B engine. This counterbalanced, air-cooled V-Twin was designed to deliver massive low-end torque (approx. 110 ft-lb) while maintaining the smooth idle characteristic of the Softail family. Unlike the rubber-mounted touring frames, the FLSTSE engine is rigid-mounted, utilizing internal counter-balancers to mitigate primary vibrations, providing a connected yet refined riding experience.
The chassis features a 32-degree rake, which, when paired with the 18-inch Stinger chrome wheels, offers a stable footprint. The suspension is tuned for a balance between the added weight of touring gear and the agility required for solo cruising.
Maintenance Guide & Service Intervals
Lubrication System
The 110ci engine runs significantly hotter than the standard 96ci or 103ci units of its era. Consequently, the use of Screamin’ Eagle SYN3 20W50 is critical. The total capacity is 3.3 liters (approx. 3.5 quarts). We recommend oil changes every 5,000 miles, though an interim 2,500-mile check is advised if riding in high-ambient temperatures.
Tires and Traction
Equipped with a substantial 200mm rear tire, the FLSTSE requires precise pressure management to prevent cupping and ensure cornering stability. Maintain 2.5 bar (36 psi) in the front and 2.9 bar (42 psi) in the rear. Due to the high torque output, rear tire wear should be monitored every 1,000 miles.
Electrical & Ignition
The FLSTSE utilizes the 65989-97C battery. Given the high-compression nature of the 110 engine, a healthy Cold Cranking Amp (CCA) rating is essential for reliable starting. Spark plugs should be gapped to 0.038-0.043 inches using the HD 6R12 standard.
Frequently Asked Questions
What is the fuel capacity of the FLSTSE?
The model features a 5.0-gallon (18.9 L) fuel tank, optimized for long-distance versatility.
Can I use standard 20W50 mineral oil?
While possible, it is not recommended for CVO engines. The synthetic SYN3 provides superior thermal stability for the high-performance 110ci internal components.
What is the primary drive fluid capacity?
The primary chaincase typically requires approximately 1.0 quart (0.95 L) of Formula+ or SYN3, depending on the service manual’s specific year-model update.