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Harley Davidson FLSTFB  Softail  Fat Boy Lo

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Make Model

Harley Davidson FLSTFB Softail Fat Boy Lo

Year

2015

Engine

Four stroke, V-Twin, Twin Cam 103™ Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters; two valves per cylinder, with Integrated Oil-Cooler

Capacity

1690 cc / 103.1 cu-in
Bore x Stroke 98.4 x 111.1 mm
Cooling System Air cooled
Compression Ratio 9.6:1

Induction

Electronic Sequential Port Fuel Injection (ESPFI)

Ignition 

Single-fire, non-wasted, map-controlled spark ignition
Starting Electric

Max Torque

132 Nm / 98.8 ft. lbs @ 3250 rpm
Clutch Multi-plate, wet

Transmission 

6 Speed 
Final Drive Belt
Gear Ratio 1st 9.311 /   2nd 6.454 /   3rd 4.793 /   4th 3.882 /  5th 3.307  /  6th 2.790
Frame Mild steel, tubular frame; rectangular section backbone; stamped, cast and forged junctions, forged fender supports; MIG welded

Front Suspension

41.3 mm telescopic, chrome dust covers

Rear Suspension

Hidden, horizontal-mounted, coil-over shock

Front Brakes

Single 292mm disc 4 piston caliper

Rear Brakes

Single 292mm disc 4 piston caliper

Front Tyre

140/75R17 67V

Rear Tyre

200/55R17 78V
Rake (steering head)  31.6°
Trail 147 mm  / 5.7 in
Dimensions Length 2445 mm / 96.2 in
Wheelbase 1715 mm / 67.5 in
Seat Height Laden      616 mm /24.3 in
Unladen  669 mm  / 26.4 in
Gross Vehicle Weight Rating 526.0 kg / 1160 lbs

Dry Weight

317.5 kg / 700 lbs
Wet Weight 330 kg / 731 lbs
Oil Capacity 3.3 Litres / 3.50 qts

Fuel Capacity 

18.9 Litres / 5 gal

Building on the Fat Boy® legacy, the Fat Boy® Lo brought a darker, slammed appearance to the world of boulevard cruisers, drawing the attention of core customers and dreamers alike.

From front to back, this custom cruiser shows attitude, with custom, black bullet hole wheels, a denim black frame, blacked-out covers and header shields, and satin chrome in all the places mirror chrome would normally reside.

But it's not just about looks. A slammed, narrow-cut seat rides just 24.25-inches off the ground, while the forward foot controls and low, 1.25-inch handlebar create a secure stance that inspires a cruising state of mind. And with of anti-lock brakes in the Security Package option, the Fat Boy Lo truly remains at the head of the pack.

NEW Standard Anti-lock Braking System (ABS)
NEW Paint color options
• Rigid-mounted, counter-balanced Twin Cam 103B™ V-Twin engine with Electronic Sequential Port Fuel Injection (ESPFI)
• Low profile, 1.25-inch internally-wired handlebar
• Seat is lower and narrower for an easy reach to the ground
• Leather tank panel with Harley-Davidson® medallion
• Satin-chrome tank console and side badges
• Bullet Hole Cast Aluminum Disc wheels with black centers and machined outer rims
• Denim Black frame, swingarm, front shock covers, derby cover, horn cover, coil cover, oil tank, and air cleaner cover
• Gloss Black triple clamp covers and nacelle, headlight bucket, air cleaner cover trim ring, rear fender supports, footboards
• Black powder-coated powertrain with satin-chrome covers
• Rear suspension lowered 1.15-inch
• 200 mm rear tire
• Over/under shotgun exhaust with satin-chrome mufflers and muffler shields, and flat-black header shields
• Half-moon black rider floorboards
• Stainless steel 1.25-inch, internally-wired handlebar
• Rolled edge front fender
• Full-coverage rear fender
• 6-speed Cruise Drive® Transmission
• Horseshoe oil tank
• Five-gallon fuel tank
• Optional Smart Security System with proximitybased, hands free security fob
• Optional Engine Idle Temperature Management Strategy (EITMS) (Dealer activated option)

Features and Benefits

Fat Custom Style

Recalling the "hardtail" choppers of the '60s and '70s, the Fat Boy® Lo model keeps that heritage alive more than forty years later. It shows a darker side of the original "fat custom" bike—laid-back and blacked-out with an unmistakable profile on the road. But the nostalgic style isn't just about the confident stance, paint and old-school detail. It's how you look riding it. It's how it feels. It's the classic, relaxed riding position that speaks volumes. You're not just cruising. You're in charge—kicked back on a throne of machined metal surveying your domain.

Fat Custom Tank Details

This tank makes a statement with its leather tank strap, satin chrome side badges, and satin chrome speedometer and ignition switch console. The speedo face boasts a big, bold display for the odometer and an ancillary display for gear and rpm, so all the info you need on the fly is yours at a glance.

Fat Features

Big in all the right places. The 17-inch wheels of black, bullet-hole, disc-cast aluminum definitely make an impression—especially with rubber 140mm wide in front and a beefy 200mm in back. And check out the chopsticks up front—fat front fork behind the huge, gorgeous headlamp. The handlebars are wide, giant stainless steel with bare-knuckle satin chrome risers. It's a lot of fat in one tight bike. Definitely meaty. Wide. Big-boned. A bruiser. Call it what you want. Just admit that you want it.

Hidden Rear Shocks

If you want a comfortable bike but love that rigid-suspension look, you've come to the right bike. We've kept all the modern comforts where they belong—below the surface of a rad, vintage-looking bike. You get the classic lines of a vintage "hardtail" frame with the horizontal rear shocks hidden in the guts. It's a signature rigid look, and you'll only find it on a Softail® model.

Blacked Out Finishes

You might say black is the new chrome when it comes to the Fat Boy® Lo model. There's black denim finish on the frame, swingarm, front shock covers, derby cover, horn cover, coil cover, oil tank and air cleaner cover. Black, bullet-hole disc-cast aluminum wheels with black centers and matching outer rims. Flat-black exhaust shields on the satin chrome shotgun exhaust. Gloss black half-moon footboards. Even blacked-out mirrors and headlamp. And black powder-coating on the powertrain with satin chrome accents finishes the job. With all this paint, you won't just be riding fat and low. You'll be throwing shade all the way.

Pure Harley-Davidson Styling

Feast your eyes on the Twin Cam 103™ engine and there's no mistaking its roots. This is authentic Harley-Davidson style through and through with an attention to detail you won't find from any other motorcycle company. Black powder-coated heads and cylinders are highlighted by machined cooling fin tips and satin chrome rocker covers. It's a jewel machined out of metal. Pure. Dripping with power. From the classic edge of the cooling fins to the clean lines of cases and covers—the Twin Cam 103™ engine makes an ironclad statement about holding on to what's right and staying true to what satisfies.

Six-Speed Cruise Drive® Transmission

You want a ride that rumbles—not begs for mercy—when you lean on it a little. The Six-Speed Cruise Drive® transmission provides smooth, quiet shifting and reduces engine speed on the highway, so you get a better match between engine turnover and road speed. It's a rare ride when a bike responds like this, and a low growl goes a long way when you're opening up the road ahead.

Twin Cam 103™ Engine Heritage

The knowledge of what makes an engine truly move a rider runs deep at The Motor Company, and it was put to good use when we created the Twin Cam 103™; engine. We sweated bullets perfecting every cubic inch, pushing design and technology forward. And we did it all without compromising one bit of Harley-Davidson's unique styling. Evolved, yet carrying on the legacy of the Flathead, Knucklehead, Panhead, Shovelhead, Evolution®, Twin Cam 88®; and Twin Cam 96™ engines that came before. The performance and durability are a direct result of the untold miles logged on the V-Twin since 1909, and the proud heritage that comes from a century's worth of commitment to life on two wheels.

Twin Cam 103™ Engine Innovation

Fire up the Twin Cam 103™ engine and feel the low-end torque unleashed. Thanks to the lightweight piston design, delivery of the added power is more refined than ever. Then put your foot on the shifter and feel how the engine and Six-Speed Cruise Drive® transmission were designed to work together. Six speeds. A strong driveline and strong internal parts. Low routine maintenance. And a low cruising rpm couldn't feel better.

Twin Cam 103™ Engine Power

Live your ride to the power of 103. The air cooled Twin Cam 103™ Harley Davidson® engine delivers more stump pulling torque, while its Electronic Sequential Port Fuel Injection jetting gives crisp, lively throttle reaction. It’s a performance punch that you’ll appreciate when passing, climbing hills, or rolling with luggage packed or a passenger in back—all under that signature Motor Company rumble. And it comes at lower cruising rpm, so you ride more smoothly, with less engine vibration and better highway fuel economy.

H-D® Smart Security System (Optional)

The optional factory installed next-generation security system features a hands-free fob that automatically arms and disarms the vehicle electronic security functions as you approach and walk away from the bike. Stick the fob on your ignition key ring and let it do all the work. It's this attention to details and security that make Harley-Davidson® motorcycles unique.

Standard Anti-Lock Brakes

When it comes to the Fat Boy® Lo model, "stopping power" has a double meaning. The components of our ABS are tastefully hidden within the wheel hub, so you'll still turn heads with clean, streamlined design. More importantly, though, you get certainty in the saddle knowing your bike's going to behave when you need it.

Fat Dunlop® Tires

Fatter is better. Rubber 140mm wide up front mitigates feedback from the street for a smoother ride. And the beefy 200mm rear tire provides a confident feeling of sure contact with the road. And since they're from Dunlop®, you know you're wrapping your premium rollers in quality rubber.

Low Suspension

To give the Fat Boy® Lo model its distinctive road-hugging stance, we've dropped the front and rear suspension 1.15 inches. It's a down and dirty 24.25 inches. Perfect for smaller riders or those who just like to feel down in the bike.

Full-Length Rider Footboards

Your boots were made for riding, in any way you see fit. Our full-length footboards boast a tried and true design that's stood the test of time. Plenty of foot positions for your taste and comfort. Rubber vibration isolation for a comfortable ride. And heel-toe shifting for confident shifting every time. It takes a few rides, but once you've gotten used to the smooth heel-toe rhythm, you'll never give it up. The toes of your boots won't take the same beating, either.

Low Profile Handlebars

These low profile fat handlebars practically beg you to reach out and grab your freedom. Their reduced-reach design makes them perfect both for new riders who want the confidence of better control and road-hardened warriors who demand more easy-rider comfort.

Narrow Seat

To go along with the low seat height, we've added some ergos to make sure every inch of low pays off in pleasurable riding. We've slimmed up the seat itself. With the seat shape, lowdown frame and rigid powertrain, you can be sure you'll feel a solid, comfortable connection with the bike and road.