Harley-Davidson Softail Standard 107 (FXST) — OEM Fluid, Tire Pressure & Maintenance Specs
1,746cc Air/Oil-Cooled Dual-Counterbalanced 45° V-Twin Milwaukee-Eight 107 · Source: Harley-Davidson Softail Standard 107 (FXST) (2020–2024) Official Owner’s Manual Maintenance Specifications
According to the Harley-Davidson Softail Standard 107 (FXST) (2020–2024) Official Owner’s Manual Maintenance Specifications, the 2020–2024 Harley-Davidson Softail Standard 107 (FXST) (chassis FXST) 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 207 kPa / 2.07 bar / 30 PSI front (100/90B19 57H) and 276 kPa / 2.76 bar / 40 PSI rear (150/80B16 77H), paired with 4× HD 6R10 (31600012 Dual-Plug M8) spark plug(s) and a YTX20HL-BS / HD 65989-97E battery.
Drain only: 4.3 L (4.54 US qt)
R 276 kPa (2.76 bar)
Est. Range: ~253 km (157 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: 100/90B19 57H · Rear: 150/80B16 77H (Tube-Type Spoke Rim) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 207 kPa / 2.07 bar / 30 PSI Rear: 276 kPa / 2.76 bar / 40 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 207 kPa / 2.07 bar / 30 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 | YTX20HL-BS / HD 65989-97E (12V 18.0Ah Heavy-Duty AGM) |
| Final Drive Maintenance | Carbon/Aramid Reinforced Secondary Belt — Inspect belt deflection and pulley debris |
| Brake Fluid & Coolant | DOT 4 · Air/Oil-Cooled Engine (No liquid coolant) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 1746 cc · 86 hp @ 5,020 rpm · 144 N·m (106.2 lb-ft) @ 3,000 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 680 mm (26.8 in) · 297 kg (655 lbs) |
| Fuel Tank & Est. Real-World Range | 13.2 L (3.5 US gal) · ~19.2 km/L → ~253 km (157 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
Revived in 2020 as the purest Big Twin custom canvas, the FXST combines a polished/chrome M8 107 (1,746cc), solo tuck-and-roll seat, mini-ape bars, and laced or late-run cast wheels.
Oil & Clutch Mechanical Engineering Note
The 1,746cc M8 107 shares the exact same sump, spin-on filter (HF171C), and 3-Hole fluid capacities (4.7 L SAE 20W-50 engine, 1,065 ml primary, 828 ml gearbox) as larger 114/117 Softails.
Garage Wrenching Gotchas
- 2020–2022 spoked FXST wheels require inner tubes while 2023+ Annihilator cast-wheel builds run tubeless; verify rim type before ordering replacement tires.
- Shipped strictly as a solo bobber, adding two-up seating requires installing clevis passenger peg mounts with medium threadlocker and raising monoshock preload under the seat.
5. Frequently Asked Questions (FAQ)
How are engine and separate drivetrain fluid capacities split on the Harley-Davidson Softail Standard 107 (FXST)?
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 Softail Standard 107 (FXST), 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 Softail Standard 107 (FXST)?
Equipped with 100/90B19 57H front and 150/80B16 77H rear tube-type rims (mushroom/string plugs will not seal—carry spare inner tubes), set cold tire pressures to 30 / 40 PSI (207/276 kPa) solo or 30 / 42 PSI loaded. Seat height is 680 mm (26.8 in) at 297 kg wet weight, delivering ~253 km per 13.2 L tank.