This document is the owner's manual for the Husqvarna FS 450 motorcycle, model year 2020. It provides comprehensive information on the vehicle's design, operation, maintenance, and technical specifications.
Function Description
The Husqvarna FS 450 is a state-of-the-art, sporty 1-cylinder 4-stroke, water-cooled motorcycle designed and built to withstand the normal stresses and strains of racing. It complies with the regulations and categories of top international motorsports organizations. The vehicle is intended for use only in closed-off areas, remote from public road traffic. It features an electronic fuel injection system, a hydraulically operated self-adjusting clutch, and a 5-gear claw-shifted transmission. The motorcycle is equipped with WP XACT 5548 air suspension in the fork and a WP XACT 5750 shock absorber, offering adjustable compression and rebound damping. Advanced electronic aids include launch control and traction control, which can be activated or deactivated during a ride.
Important Technical Specifications
Engine:
- Design: 1-cylinder 4-stroke engine, water-cooled
- Displacement: 449.9 cm³ (27.455 cu in)
- Stroke: 63.4 mm (2.496 in)
- Bore: 95 mm (3.74 in)
- Compression ratio: 12.75:1
- Idle speed: 2,100 – 2,200 rpm
- Control: OHC, 4 valves controlled via rocker arm
- Valve diameter (intake/exhaust): 40 mm (1.57 in) / 33 mm (1.3 in)
- Valve clearance (intake/exhaust at 20 °C (68 °F)): 0.10 – 0.15 mm (0.0039 – 0.0059 in) / 0.12 – 0.17 mm (0.0047 – 0.0067 in)
- Engine lubrication: Pressure circulation lubrication with two Eaton pumps
- Primary transmission: 31:76
- Clutch: Multidisc clutch in oil bath, hydraulically activated
- Gearbox: 5 gear transmission, claw shifted
- Transmission ratio (1st to 5th gear): 16:32, 18:30, 20:28, 22:26, 24:24
- Alternator: 12 V, 70 W
- Ignition: Contactless controlled fully electronic ignition with digital ignition adjustment
- Spark plug: NGK LMAR9AI-8
- Spark plug electrode gap: 0.8 mm (0.031 in)
- Cooling: Water cooling, permanent circulation of coolant by water pump
- Starting aid: Starter motor
Capacities:
- Engine oil: 1.20 l (1.27 qt.) (SAE 10W/50)
- Coolant: 1.20 l (1.27 qt.)
- Fuel: 6.8 l (1.8 US gal) (Super unleaded ROZ 95/RON 95/PON 91)
Chassis:
- Frame: Central tube frame made of chrome molybdenum steel tubing
- Fork: WP XACT 5548
- Suspension travel (front/rear): 280 mm (11.02 in) / 266 mm (10.47 in)
- Fork offset: 16 mm (0.63 in)
- Shock absorber: WP XACT 5750
- Brake system (front): Single disc brake with radially screwed four-piston fixed caliper, floating brake disc
- Brake system (rear): Single disc brake with single-piston floating brake caliper, fixed brake disc
- Brake discs - diameter (front/rear): 310 mm (12.2 in) / 220 mm (8.66 in)
- Brake discs - wear limit (front/rear): 4.5 mm (0.177 in) / 3.5 mm (0.138 in)
- Tire pressure (cold, front/rear at 10 – 30 °C (50 – 86 °F)): 1.9 bar (28 psi) / 1.7 bar (25 psi)
- Tire pressure (warm, front/rear at 75 – 85 °C (167 – 185 °F)): 2.1 bar (30 psi) / 1.9 bar (28 psi)
- Secondary ratio: 14:45
- Chain: 5/8 x 1/4"
- Steering head angle: 63.9°
- Wheelbase: 1,475 ± 10 mm (58.07 ± 0.39 in)
- Ground clearance (unloaded): 290 mm (11.42 in)
- Seat height (unloaded): 890 mm (35.04 in)
- Weight without fuel (approx.): 102.9 kg (226.9 lb.)
- Maximum permissible axle load (front/rear): 145 kg (320 lb.) / 190 kg (419 lb.)
- Maximum permissible overall weight: 335 kg (739 lb.)
Electrical System:
- 12 V battery: HJTZ5S-FP-C Lithium-ion battery, 12 V, 2.0 Ah, maintenance-free
- Fuse: 10 A
- Malfunction indicator lamp: LED
Usage Features
The FS 450 offers several features to enhance the riding experience and performance:
- Combination Switch: Located on the left handlebar, it allows the rider to switch between STANDARD and ADVANCED engine mappings.
- Traction Control (TC): Activated via the TC button on the combination switch, it reduces excessive rear wheel slip, improving control, especially in wet conditions.
- Launch Control: Activated by simultaneously pressing the MAP and TC buttons, it optimizes acceleration from a standing start by reducing maximum engine speed with a fully open throttle, gradually increasing it after the start.
- Cold Start Button: Located at the bottom of the throttle valve body, it assists in starting a cold engine by providing additional oxygen to burn increased fuel quantity.
- Idle Speed Adjusting Screw: Allows for adjustment of the idle speed to ensure stable engine operation.
- Adjustable Levers: The clutch lever and hand brake lever basic positions can be adjusted to suit the rider's hand size. The foot brake lever's basic position and free travel are also adjustable.
- Handlebar Position: The handlebar can be mounted in four different positions for optimal rider comfort.
- Service Hour Counter: Fitted in front of the handlebar, it displays the total engine operating hours, which cannot be cleared or adjusted.
Maintenance Features
The manual outlines a comprehensive service schedule and detailed instructions for various maintenance tasks:
- Regular Checks: Before every ride, checks include engine oil level, brake fluid levels (front and rear), brake lining wear (front and rear), brake system function, coolant level, chain condition (dirt, tension, wear), tire condition and pressure, and spoke tension.
- Engine Service: Includes changing engine oil and oil filter, cleaning oil screens, and checking valve clearance.
- Chassis Service: Covers bleeding fork legs, cleaning dust boots, removing and installing fork protectors, removing and installing fork legs, checking and adjusting steering head bearing play, lubricating steering head bearings, removing and installing front and rear fenders, removing and installing the shock absorber, checking the frame and link fork for damage, and checking throttle cable routing.
- Brake System Maintenance: Includes checking brake discs for wear and damage, adding front and rear brake fluid, and changing front and rear brake linings.
- Wheel and Tire Maintenance: Involves removing and installing front and rear wheels, checking tire condition and pressure, and checking spoke tension.
- Electrical System Maintenance: Includes removing, installing, and charging the 12 V battery, and changing the main fuse.
- Cooling System Maintenance: Covers checking antifreeze and coolant levels, draining, and refilling coolant.
- Storage: Instructions for preparing the motorcycle for storage and preparing it for use after storage, including fuel additive use, cleaning, and battery maintenance.
- Troubleshooting: A dedicated section provides a list of common faults, possible causes, and recommended actions.
- Blink Code: A table of blink codes for the malfunction indicator lamp helps identify specific electronic system errors.
The manual emphasizes the importance of proper maintenance by authorized Husqvarna Motorcycles workshops to ensure optimal performance, safety, and warranty validity. It also provides guidelines for environmental protection during maintenance and disposal of hazardous substances.
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