Husqvarna FS 450 Supermoto — OEM Fluid, Tire Pressure & Maintenance Specs
449.9cc Liquid-Cooled Single SOHC 4-Valve (Suter Slipper · Alpina) · Source: Husqvarna FS 450 Supermoto (2017–Present) Official Owner’s Manual Maintenance Specifications
According to the Husqvarna FS 450 Supermoto (2017–Present) Official Owner’s Manual Maintenance Specifications, the 2017–Present Husqvarna FS 450 Supermoto (chassis VBKFSK43/HQV-FS450) requires 1 L (1.06 US qt) of SAE 10W-50 (JASO MA2, Motorex Cross Power / Power Synt 4T) engine oil for a drain-only change and 1.2 L (1.27 US qt) with filter service (77338005100 / HF652 (+ Dual Screens)). Standard solo cold tire pressure is 170 kPa / 1.70 bar / 25 PSI front (125/80 R420 (16.5)) and 160 kPa / 1.60 bar / 23 PSI rear (165/65 R17), paired with 1× NGK LMAR9AI-8 / LKAR8AI-9 spark plug(s) and a HJTZ5S-FP (LiFePO4) / YTZ10S battery.
Drain only: 1 L (1.06 US qt)
R 160 kPa (1.60 bar)
Est. Range: ~137 km (85 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Wet Multi-Plate Manual Clutch NEVER use JASO MB |
|---|---|
| Recommended Viscosity & Grade | SAE 10W-50 (Alt: SAE 10W-60 (LC4 690/701)) · JASO MA2 · Motorex Cross Power / Power Synt 4T |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 1 L (1.06 US qt) • With filter/strainer: 1.2 L (1.27 US qt) • Complete dry overhaul: 1.35 L (1.43 US qt) |
| OEM Oil Filter Code & Type | 77338005100 / HF652 (+ Dual Screens) |
| Correct Oil Level Check Method | Hold bike upright on level ground 3–5 min after warm shutdown; read crankcase sight glass |
| Oil Drain Bolt Torque | 20 N·m (14.8 lb-ft / 2.04 kgf·m) — Use fresh crush washer |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 125/80 R420 (16.5) · Rear: 165/65 R17 (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 170 kPa / 1.70 bar / 25 PSI Rear: 160 kPa / 1.60 bar / 23 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 180 kPa / 1.80 bar / 26 PSI Rear: 170 kPa / 1.70 bar / 25 PSI |
| OEM Spark Plug & Quantity | NGK LMAR9AI-8 / LKAR8AI-9 × 1 (Gap: 0.8 mm) |
| OEM Battery Code & Rating | HJTZ5S-FP (LiFePO4) / YTZ10S (12V Lithium / AGM) |
| Final Drive Maintenance | 520 Sealed X-Ring Chain — Maintain 25–35 mm slack and clean/lubricate regularly |
| Brake Fluid & Coolant | DOT 4 or DOT 5.1 · OAT ethylene-glycol coolant for aluminum radiators (50:50 premix) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 450 cc · 63 hp @ 9,500 rpm · 52 N·m (38.4 lb-ft) @ 7,500 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 890 mm (35.0 in) · 108 kg (238 lbs) |
| Fuel Tank & Est. Real-World Range | 7.2 L (1.9 US gal) · ~19 km/L → ~137 km (85 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 500 km • Engine Oil / Filter: 2,500 km / 2,500 km • Air Filter / Spark Plug: 2,500 km / 10,000 km • Valve Clearance Check: 5,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Factory closed-course supermoto racer armed with Alpina 16.5/17-inch tubeless spoke wheels, Suter anti-hopping clutch, Brembo M50 radial brakes, and quickshifter.
Oil & Clutch Mechanical Engineering Note
KTM/Husqvarna 4-stroke EXC-F / FE & LC4 690/701 platform requiring dual oil-screen cleaning and frequent Motorex JASO MA2 synthetic oil service.