Harley Davidson FLSTF/I Fat Boy (2003-04)

The Harley Davidson FLSTF/I Fat Boy is a motorcycle manufactured between 2003 and 2004. It has a four-stroke, 45-degree V-twin Twin Cam 88 engine with a capacity of 1449cc and pushrod-operated overhead valves. The compression ratio is 8.9:1 and it has a dry sump lubrication system. The bike features carburetion 40mm constant velocity with enrichener, electronic sequential port fuel injection, and a single-fire, non-wasted map-controlled spark ignition. It has a maximum power output of 67 horsepower at 5200 rpm and a maximum torque of 116.6 Nm at 3500 rpm. The bike also has a 5-speed transmission and a belt final drive. The frame is made of mild steel tubular structure with rectangular sections and forged fender supports. The suspension system includes 41.3mm telescopic forks with beer can covers and a hidden, horizontal-mounted, coil-over shock. It has 130mm ground clearance and weighs 310 kg in its dry state and 324 kg when wet. The fuel capacity is 18.9 liters and the oil capacity is 3.3 liters. The fat boy is designed with a 32-degree rake, a fork angle of 32 degrees, and a trail of 147mm. The front and rear brakes are single disc 292mm with a 4-piston caliper. The front wheel has a D402F MT90B16 72H tire while the rear wheel has a D401 150/80B16 71H tire. The bike has a wheelbase of 1638mm, seat height of 645.2mm (laden) and 698.5mm (unladen), and a length of 2395.2mm.

---

Technical specifications:

Make Model: Harley Davidson FLSTF/I Fat Boy

Year: 2003 – 04

Engine: Four stroke, 45 degrees V-Twin, Twin Cam 88 (R) vibration isolation-mounted Valves Pushrod-operated overhead valves; w/ hydraulic self-adjusting lifters; two valves per cylinder

Capacity: 1449 cc / 88.4 cu-in

Bore x Stroke: 95.3 x 101.6 mm

Cooling System: Air cooled

Compression Ratio: 8.9:1

Lubrication: Dry sump, internally mounted, crank driven gerotor pressure and dual scavenge pump with spin on 10~Anot pressurized oil filter

Induction: Carburetion 40 mm constant velocity with enrichener and accelerator pump ESPFI 38 mm throttle bore electronic sequential port fuel injection

Ignition: Single-fire, non-wasted, map-controlled spark ignition

Starting: Electric

Max Power: 67 hp / 48.8 kW @ 5200 rpm

Max Torque: 116.6 Nm / 86 lb-ft @ 3500rpm

Clutch: Wet 9-plate

Transmission: 5 Speed

Final Drive: Belt

Primary Drive Ratio: Chain, 36/25

Gear Ratio: 1st 10.110 2nd 6.958 3rd 4.953 4th 3.862 5th 3.150

Frame: Mild steel tubular frame; rectangular section backbone; stamped, cast and forged junctions; forged fender supports; MIG welded Swingarm Mild steel, rectangular tube sections, stamped junctions, MIG welded

Front Suspension: 41.3 mm Telescopic forks with beer can covers

Front Wheel Travel: 130 mm / 5.1 in

Rear Suspension: Hidden, horizontal-mounted, coil-over shock

Rear Wheel Travel: 109 mm / 4.3 in

Front Brakes: Single 292mm disc 4 piston caliper

Rear Brakes: Single 292mm disc 4 piston caliper

Front Tyre: D402F MT90B16 72H

Rear Tyre: D401 150/80B16 71H

Rake: 32 degrees

Fork Angle: 32 degrees

Trail: 147 mm / 5.8 in

Dimensions: Length 2395.2 mm / 94.3 in

Wheelbase: 1638 mm / 64.5 in

Seat Height: Laden2 645.2 mm / 25.4 in Unladen 698.5mm / 27.5 in

Ground Clearance: 130 mm /. 5.1 in

Dry Weight: 310 kg / 683 lbs

Wet Weight: 324 kg / 714 lbs

Oil Capacity: 3.3 Litres / 3.5 qts.

Fuel Capacity: 18.9 Litres / 5.0 US gal