# Harley-Davidson Fat Boy — Full Specifications 2026

> Complete technical specifications for the Harley-Davidson Fat Boy.

Source: https://indianautoforum.com/bikes/harley-davidson/fat-boy/specifications

The Milwaukee-Eight 117 Custom engine at the heart of the Fat Boy is a 1923 cc V-twin, the largest engine Harley-Davidson fits into its Softail platform. With 104.69 PS at 5,020 rpm and 168 Nm of torque at just 3,000 rpm, this is a motor built for authority rather than outright speed. That torque number means you barely need to open the throttle above 1,500 rpm on most Indian highways - the bike simply surges forward in a long, unhurried wave that never feels hurried or stressed.

The Fat Boy tips the scales at 315 kg in running order. It is a heavy machine, but that weight is distributed low - the wide 240/40-R18 rear tyre and cast aluminium Lakester wheels keep the centre of gravity closer to the tarmac than the kerb weight suggests. The 675 mm seat height is genuinely accessible; even a 5-foot-4 Indian rider can place both feet flat on the ground.

Braking is handled by a dual-channel ABS setup: a 300 mm front disc with a four-piston caliper and a 292 mm rear disc with a two-piston caliper. Alongside standard dual-channel ABS, the Fat Boy gets Traction Control System (TCS), Drag-Torque Slip Control System (DSCS), and cornering-enhanced versions of both safety nets - meaningful additions for Indian road surfaces that can transition suddenly from dry tarmac to loose gravel.

Suspension is a 49 mm telescopic fork at the front and a hidden monoshock at the rear with hydraulic preload adjustment. The 18.9-litre fuel tank gives a theoretical range of over 340 km at the ARAI-certified 18.18 kmpl. Real-world mileage typically comes in at 14-16 kmpl in city traffic and 18-21 kmpl on open highways with premium fuel - so expect 250-380 km per tank depending on how and where you ride.

The Fat Boy gets full LED lighting front to rear, USB charging, Michelin Scorcher tyres (160/60-R18 front, 240/40-R18 rear), a Tyre Pressure Monitoring System, and Harley-Davidson's Boom! GTS infotainment with Bluetooth connectivity. The 6-speed manual gearbox drives the rear wheel via a belt - practically maintenance-free for the distances most Indian owners cover.

## Brakes & Wheels
| Spec | Value |
|------|-------|
| Braking System | Dual Channel ABS |
| Front Brake | Disc, 300 mm, 4 piston caliper |
| Rear Brake | Disc, 292 mm, 2 piston caliper |
| Tyre Pressure (Rider & Pillion) | Front - 36 psi, Rear - 40 psi |
| Tyre Pressure (Rider Only) | Front - 36 psi, Rear - 40 psi |
| Tyre Size | Front - 160/60 - R18, Rear - 240/40 - R18 |
| Tyre Type | Tubeless |
| Wheel Size | Front - 18 inch, Rear - 18 inch |
| Wheel Type | Alloy |

## Dimensions
| Spec | Value |
|------|-------|
| Fuel Tank Capacity | 18.9 litres |
| Ground Clearance | 115 mm |
| Kerb Weight | 317 kg |
| Overall Dimensions (LxWxH) | 2370 mm x 985 mm x 1095 mm |
| Reserve Fuel Capacity | 3.8 litres |
| Seat Height | 675 mm |
| Wheelbase | 1665 mm |

## Power & Performance
| Spec | Value |
|------|-------|
| Battery | Maintenance Free |
| Bore x Stroke | 102 mm x 114.3 mm |
| Clutch | Wet Multiplate |
| Compression Ratio | 10.5:1 |
| Displacement | 1868 cc |
| Emission Standard | BS6 Phase 2 |
| Engine Type | 2 Cylinder, Liquid Cooled, 4 Valves |
| Fuel Type | Petrol |
| Gear Shifting Pattern | 1 Down 5 Up |
| Max Power | 93.87 bhp @ 5020 rpm |
| Max Torque | 155 Nm @ 3250 rpm |
| Mileage - ARAI | 18 kmpl |
| Riding Modes | No |
| Riding Range | 340 km |
| Spark Plugs | 2 Per Cylinder |
| Top Speed | 177 kmph |
| Transmission | 6 Speed Manual |
| Transmission Type | Chain Drive |

## Suspensions & Chassis
| Spec | Value |
|------|-------|
| Chassis Type | Mild steel, tubular frame |
| Front Suspension | Dual-bending valve 49 mm telescopic with aluminum fork triple clamps |
| Front Suspension Preload Adjuster | No |
| Rear Suspension | Hidden, free piston, coil-over monoshock; 43mm stroke |
| Rear Suspension Preload Adjuster | Yes |

## Warranty and Services
| Spec | Value |
|------|-------|
| No. of Free Services | No |
| Vehicle Warranty | Unlimited km or 2 years |

These specs position the Fat Boy interestingly in India's big-bike landscape. The 1923 cc engine is considerably larger than the Indian Chief Dark Horse's 1,770 cc unit, and sits between the Triumph Rocket 3's 2,458 cc three-cylinder and the BMW R18's 1,802 cc twin. In day-to-day riding, character matters more than displacement - and the Milwaukee-Eight 117's low-rev torque delivery is distinctly different from either rival.

Service intervals are set at 8,000 km. Given Harley's premium service pricing in India, budget approximately Rs 8,000-15,000 per service at authorised dealers. The belt drive eliminates chain maintenance costs entirely, which partially offsets the servicing premium over time.

## FAQs

**What is the engine displacement of the Harley-Davidson Fat Boy?**
The Harley-Davidson Fat Boy is powered by a 1923 cc Milwaukee-Eight 117 Custom V-twin engine producing 104.69 PS at 5,020 rpm and 168 Nm of torque at 3,000 rpm.

**What is the fuel efficiency of the Harley-Davidson Fat Boy?**
The ARAI-certified mileage is 18.18 kmpl. Real-world efficiency in Indian conditions ranges from 14-16 kmpl in city traffic to 18-21 kmpl on highways. The 18.9-litre tank provides a practical range of 250-380 km per fill.

**What are the dimensions and kerb weight of the Harley-Davidson Fat Boy?**
The Harley-Davidson Fat Boy has an overall length of 2,365 mm, wheelbase of 1,650 mm, seat height of 675 mm, and ground clearance of 115-125 mm. Kerb weight is 315 kg in running order.

**What suspension setup does the Harley-Davidson Fat Boy use?**
The Fat Boy uses a 49 mm telescopic fork at the front and a hidden monoshock with hydraulic preload adjustment at the rear. This setup prioritises comfort on long highway runs while providing adequate cornering stability at the lean angles the wide rear tyre allows.

**Does the Harley-Davidson Fat Boy get ABS on all variants?**
Yes - all Fat Boy variants get dual-channel cornering ABS as standard. The bike also includes Traction Control System (TCS) and Drag-Torque Slip Control System (DSCS) across all variants. There is no non-ABS version sold in India.

## More
- [Overview](/bikes/harley-davidson/fat-boy)
- [Variants & Prices](/bikes/harley-davidson/fat-boy/variants)
- [Price in India](/bikes/harley-davidson/fat-boy/price)