Harley-Davidson CVO Street Glide 121 VVT (FLHXSE) — OEM Fluid, Tire Pressure & Maintenance Specs
1,977cc Liquid-Cooled Head Variable Valve Timing 45° V-Twin Milwaukee-Eight VVT 121 · Source: Harley-Davidson CVO Street Glide 121 VVT (FLHXSE) (2023–Present) Official Owner’s Manual Maintenance Specifications
According to the Harley-Davidson CVO Street Glide 121 VVT (FLHXSE) (2023–Present) Official Owner’s Manual Maintenance Specifications, the 2023–Present Harley-Davidson CVO Street Glide 121 VVT (FLHXSE) (chassis FLHXSE) requires 4.3 L (4.54 US qt) of SAE 20W-50 (JASO MA2, Screamin’ Eagle SYN3 20W-50 / H-D 360 20W-50) engine oil for a drain-only change and 4.7 L (4.97 US qt) with filter service (HD 62700296 / 62700297 (HF171C)). Standard solo cold tire pressure is 248 kPa / 2.48 bar / 36 PSI front (130/60B19 M/C 61H) and 276 kPa / 2.76 bar / 40 PSI rear (180/55B18 M/C 80H), paired with 4× HD 6R10 (31600012 Dual-Plug M8) spark plug(s) and a YIX30L-BS / HD 66010-97E battery.
Drain only: 4.3 L (4.54 US qt)
R 276 kPa (2.76 bar)
Est. Range: ~386 km (240 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Wet Multi-Plate Manual Clutch NEVER use JASO MB |
|---|---|
| Recommended Viscosity & Grade | SAE 20W-50 · JASO MA2 · Screamin’ Eagle SYN3 20W-50 / H-D 360 20W-50 |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 4.3 L (4.54 US qt) • With filter/strainer: 4.7 L (4.97 US qt) • Complete dry overhaul: 5.2 L (5.49 US qt) |
| OEM Oil Filter Code & Type | HD 62700296 / 62700297 (HF171C) |
| Correct Oil Level Check Method | At full operating temperature resting ON THE SIDESTAND (Jiffy Stand); thread dipstick in to read |
| Oil Drain Bolt Torque | 24 N·m (17.7 lb-ft / 2.45 kgf·m) — Use fresh crush washer |
| Primary Chaincase Fluid | 1065 ml (1.06 L) — H-D Formula+ Primary & Clutch Fluid (900–1,065 ml wet refill) |
| Separate Transmission / Gearbox Oil | 828 ml (0.83 L) — H-D Formula+ or Heavy Synthetic Gear Oil 80W-140 (828 ml / 28 oz) |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 130/60B19 M/C 61H · Rear: 180/55B18 M/C 80H (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 248 kPa / 2.48 bar / 36 PSI Rear: 276 kPa / 2.76 bar / 40 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 248 kPa / 2.48 bar / 36 PSI Rear: 290 kPa / 2.90 bar / 42 PSI |
| OEM Spark Plug & Quantity | HD 6R10 (31600012 Dual-Plug M8) × 4 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YIX30L-BS / HD 66010-97E (12V 28.0Ah Heavy-Duty AGM) |
| Final Drive Maintenance | Carbon/Aramid Reinforced Secondary Belt — Inspect belt deflection and pulley debris |
| Brake Fluid & Coolant | DOT 4 · Harley-Davidson Extended Life OAT Coolant (VVT 121 Liquid-Cooled Heads) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 1977 cc · 115 hp @ 4,500 rpm · 189 N·m (139.4 lb-ft) @ 3,000 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 715 mm (28.1 in) · 380 kg (838 lbs) |
| Fuel Tank & Est. Real-World Range | 22.7 L (6.0 US gal) · ~17 km/L → ~386 km (240 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,600 km • Engine Oil / Filter: 8,000 km / 8,000 km • Air Filter / Spark Plug: 24,000 km / 48,000 km • Valve Clearance Check: 48,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Transformed in mid-2023 with the Omega-LED batwing fairing, Milwaukee-Eight VVT 121 engine, inverted Showa fork, and Stage II Rockford Fosgate audio, distinct from 2018–2022 M8 117 CVOs.
Oil & Clutch Mechanical Engineering Note
With hydraulic VVT oil galleries integrated into the right camchest cover, strict 8,000 km changes with full-synthetic SYN3 20W-50 (4.7 L) prevent phaser lag and lifter clatter.
Garage Wrenching Gotchas
- Hard saddlebags house amplified Rockford Fosgate lid speakers; always unlatch the weatherproof audio quick-disconnect plugs under the seat/side covers before lifting a bag away.
- On the upgraded Showa rear shocks, remote hydraulic preload lives on the left unit while rebound damping clicks adjust on the right shock—do not confuse the two adjusters.
5. Frequently Asked Questions (FAQ)
How are engine and separate drivetrain fluid capacities split on the Harley-Davidson CVO Street Glide 121 VVT (FLHXSE)?
The engine sump takes 4.3 L drain-only and 4.7 L (4.97 US qt) with filter (HD 62700296 / 62700297 (HF171C)) of SAE 20W-50 (JASO MA2), while isolated drivetrain cavities (primary chaincase 1065 ml, separate gearbox 828 ml) require dedicated gear/chaincase fluid.
How do you accurately check the oil level on the CVO Street Glide 121 VVT (FLHXSE), and what are its service intervals?
Bring the engine to full operating temperature and check the Full Hot mark with the motorcycle resting on its sidestand (Jiffy Stand) on level pavement—measuring upright leads to crankcase overfill and breather blow-by. Torque the drain plug to 24 N·m with a new crush washer. Factory oil change intervals are every 8,000 km, with valve clearance inspection every 48,000 km.
What are the cold tire pressures, puncture repair type, seat height, and range of the CVO Street Glide 121 VVT (FLHXSE)?
Fitted with 130/60B19 M/C 61H front and 180/55B18 M/C 80H rear tubeless rims (compatible with roadside plug kits), set cold tire pressures to 36 / 40 PSI (248/276 kPa) solo or 36 / 42 PSI loaded. Seat height is 715 mm (28.1 in) at 380 kg wet weight, delivering ~386 km per 22.7 L tank.