14 August. Friday 2026
Harley-Davidson FLHRSI Road King Custom - 2006 Specifications and Reviews
The 2006 Harley-Davidson FLHRSI Road King Custom is a heavyweight cruiser designed for riders seeking classic styling with modern reliability. Its fuel-injected 1442cc V-twin engine delivers strong low-end torque ideal for highway cruising and city riding. Best known for its iconic Road King heritage and comfortable, commanding riding position, this custom appeals to experienced riders valuing tradition and performance.
General information | |
| Category | Custom / cruiser |
| Year | 2006 |
| Model | Harley-Davidson FLHRSI Road King Custom |
Engine and Transmission Specifications | |
| Clutch | Multi-plate with diaphragm spring in oil bath |
| Transmission typefinal drive | Belt |
| Gearbox | 5-speed |
| Cooling system | Air |
| Fuel control | DOHC |
| Fuel system | Injection. Electronic Sequential Port Fuel Injection (ESPFI) |
| Bore x stroke | 95.3 x 101.6 mm (3.8 x 4.0 inches) |
| Compression | 8.9:1 |
| Torque | 116.61 |
| Stroke | 4 |
| Engine type | V2 |
| Capacity: | 1442.15 ccm (88.00 cubic inches) |
Physical measures and capacities | |
| Wheelbase | 1,613 mm (63.5 inches) |
| Ground clearance | 119 mm (4.7 inches) |
| Overall length | 2,380 mm (93.7 inches) |
| Alternate seat height | 688 mm (27.1 inches) If adjustable, highest setting. |
| Seat height | 663 mm (26.1 inches) If adjustable, lowest setting. |
| Weight incl. oil, gas, etc | 341.1 kg (752.0 pounds) |
| Dry weight | 327.0 kg (721.0 pounds) |
| | |
Harley-Davidson FLHRSI Road King Custom dimensions and frame | |
| Exhaust system | Chrome, cross-over duals |
| Rear brakes | Single disc |
| Front brakes diameter | 292 mm (11.5 inches) |
| Front brakes | Double disc |
| Rear tyre dimensions | MU85-B16 |
| Front tyre dimensions | MT90-B16 |
| Trail | 157 mm (6.2 inches) |
| Rake (fork angle) | 26.0° |
Speed and acceleration | |
| Top speed | 292.0 km/h (181.4 mph) |
| | |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Color options | Vivid black, black cherry, black pearl, deep cobalt, glacier white pearl, rich sunglo blue, yellow pearl, brandy wine sunglo |
| Fuel consumption pr. 10 km (6.2 miles) | 5.34 litres (1.41 gallons) |
| Fuel capacity | 18.92 litres (5.00 gallons) |
Performance Profile & Rider Fit
5.8s
0-60 mph (est.)
181.4 mph
Top Speed
Best For
Track10%
City45%
Cornering35%
Daily Riding60%
Touring88%
Passenger80%
Rider Profile
| Best For | Best suited to riders who already have experience handling heavy, low-slung motorcycles at parking-lot speeds and in traffic. |
| Purpose | Built for relaxed highway cruising and long-distance touring rather than outright speed or sharp handling. |
| Rider Fit | The low seat height helps shorter riders, but the substantial wet weight demands good upper-body strength and confidence at a stop or in slow maneuvers. |
| Character | A classic American cruiser character defined by big V-twin torque, a relaxed riding posture, and long-haul comfort over aggressive performance. |
| Not Ideal For | Not a good fit for riders seeking nimble cornering, off-road capability, or lightweight everyday commuting. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
Rider Reviews
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