Harley-Davidson FXDB/I Dyna Street Bob

Harley-Davidson FXDB/I Dyna Street Bob
Manufacturer	Harley-Davidson
Production	2006
Engine	Four stroke, 45° V-Twin, Twin Cam 88® vibration isolation-mounted Valves Pushrod-operated overhead valves; w/ hydraulic self-adjusting lifters; two valves per cylinder
Compression ratio	8.9:1
Top Speed	176.8 km/h
Ignition	Single-fire, non-wasted, map-controlled spark ignition
Transmission	5 Speed
Frame	Mild steel, tubular frame; rectangular section backbone; stamped, cast and forged junctions, forged fender supports; MIG welded
Suspension	Front: 49 mm w/polished aluminum fork triple clamp and dual-rate springs, 127mm wheel travel Rear: Coil-over shock , 104mm wheel travel
Brakes	Front: Single 300mm disc 4 piston caliper Rear: Single 292mm disc 4 piston caliper
Front Tire	D401F 100/90-19 57H
Rear Tire	D401 160/70B16 73V
Wheelbase	1630 mm / 64.2 in
Seat Height	Laden2 655.3 mm / 25.8 in Unladen 680.0 mm / 26.8 in
Weight	288 kg / 634 lbs (dry), 303 kg / 667 lbs (wet)
Fuel Capacity	17.8 Liters / 4.7 US gal
Manuals	Service Manual

It could reach a top speed of 176.8 km/h.

Engine

The engine was a Air cooled cooled Four stroke, 45° V-Twin, Twin Cam 88® vibration isolation-mounted Valves Pushrod-operated overhead valves; w/ hydraulic self-adjusting lifters; two valves per cylinder. The engine featured a 8.9:1 compression ratio.

Drive

Power was moderated via the Wet 9-plate.

Chassis

It came with a D401F 100/90-19 57H front tire and a D401 160/70B16 73V rear tire. Stopping was achieved via Single 300mm disc 4 piston caliper in the front and a Single 292mm disc 4 piston caliper in the rear. The front suspension was a 49 mm w/polished aluminum fork triple clamp and dual-rate springs, 127mm wheel travel while the rear was equipped with a Coil-over shock , 104mm wheel travel. The FXDB/I Dyna Street Bob was fitted with a 17.8 Liters / 4.7 US gal fuel tank. The bike weighed just 288 kg / 634 lbs. The wheelbase was 1630 mm / 64.2 in long.

Photos

Overview

Harley Davidson

FXDB/I Dyna Street Bob

When friends and family ask me how long I've been with Cycle World, I don't say, “Since the debut of the Harley-Davidson Dyna platform.”

But I could. Although Harley claims that the Dyna family can be traced back to the first factory custom, the 1971 FX Super Glide, the actual platform, with its reconfigured frame and vibration-quelling, engine-isolation system, debuted with the 1991 FXDB Dyna Glide Sturgis. It was the first Harley created with Computer Aided Design, and with its pair of composite rubber-and-steel engine mounts (two fewer than were used on then-current FXRs), set a new standard for smooth. “At idle,” noted our October, 1990, road test of the monochrome machine, “when the engine's power pulses are at their most violent, some booms and throbs make it all the way to the footpegs, seat and handlebar, but they hardly are annoying—in fact, they make for a rather pleasant sensation. And once the revs climb above 2000 rpm, the shakes and quakes are all but eliminated.” I was reminded of this as I tooled toward Long Beach on Pacific Coast Highway aboard the solo-only Street Bob, a factory homage to bob-jobs of the past and one of six Dynas in The Motor Company's lineup for 2006. The carbureted, 1340cc Evolution V-Twin that powered the Sturgis has long since given way to the fuel-injected, 1450cc Twin Cam 88, further refined this year with a host of internal improvements, but, overall, the on-the-road experience is much the same. Startup is immediate, and the black-powdercoated engine (matching the console, battery box and belt guard) settles almost as quickly into an even idle. Regardless of rpm, throttle response is hiccup-free. Output is sufficient for getting away first from stoplights but never intimidating. This is a most pleasant and charismatic powerplant. Right up there with the engine in terms of user-friendliness—if not spiritual presence—are the new six-speed Cruise Drive transmission and easy-squeeze clutch. The first-gear “clunk” remains, as Harley intended, and the throws are positive. I never missed a shift.

This one might take you back to the middle of the century when riders looking for a little extra speed and a unique custom look on a Harley® started stripping off the shiny parts. Check out the raked front end, solo seat and Black Denim paint option. Now get ready to put two fists in the wind, courtesy of factory ape hangers framing the road ahead. The emblem on the Fat Bob™ tank looks like it was carved from a block of solid metal. Laced wheels. Black powder-coated, polished Twin Cam 88® powertrain. And the new 6-speed Cruise Drive™ transmission via mid-mount controls. Kick it into gear and you’re riding clean and pure. It’s just what the open road calls for. FXDBI Dyna Street Bob™ Model Overview The new FXDBI Street Bob takes minimalist styling to a new extreme. Inspired by the post-World War II "bobber" movement, the Street Bob discards any component not required by law ... a passenger seat and pegs, for example. A solo seat sets the tone for a motorcycle designed for the individualist. Seat height is just 25.8 inches. Mini ape-hanger handlebars, the classic Fat Bob fuel tank, a new wrap-around rear fender and steel laced wheels complete a profile that will stand out in the cruiser crowd. A new wrinkle-black finish is applied to the battery box, console and belt guard. Four color choices include new Black Denim, a flat-black finish. Vibration-isolated Twin Cam 88 engine with ESPFI Black powder-coated engine with polished covers Chrome staggered shorty dual exhaust New 6-speed Cruise Drive transmission New 49 mm forks New 29 degree fork angle/29 degree steering head angle Mini ape-hanger handlebars Fat Bob fuel tank Street Bob air cleaner trim ring Special tank emblems Wrinkle-black console with turn signal indicators Wrinkle-black battery cover with polished trim Wrinkle-black belt guard Tank-mounted speedometer Solo seat Mid-mounted foot controls New wrap-around rear fender New 160 mm rear tire Steel Laced wheels New Black Denim paint available

Make Model	Harley Davidson FXDB/I Dyna Street Bob
Year	2006
Engine Type	Four stroke, 45° V-Twin, Twin Cam 88® vibration isolation-mounted Valves Pushrod-operated overhead valves; w/ hydraulic self-adjusting lifters; two valves per cylinder
Displacement	1449 cc / 88.4 cu-in
Bore X Stroke	95.3 x 101.6 mm
Cooling System	Air cooled
Compression	8.9:1
Lubrication	Dry sump, internally mounted, crank driven gerotor pressure and dual scavenge pump with spin on 10ì 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
Gear Ratio	1st 3.337 2nd 2.313 3rd 1.718 4th 1.391 5th 1.175 6th 1.000
Frame	Mild steel, tubular frame; rectangular section backbone; stamped, cast and forged junctions, forged fender supports; MIG welded
Front Suspension	49 mm w/polished aluminum fork triple clamp and dual-rate springs, 127mm wheel travel
Rear Suspension	Coil-over shock , 104mm wheel travel
Front Brakes	Single 300mm disc 4 piston caliper
Rear Brakes	Single 292mm disc 4 piston caliper
Front Tire	D401F 100/90-19 57H
Rear Tire	D401 160/70B16 73V
Rake	29°
Fork Angle	29°
Trail	120 mm / 4.7 in
Dimensions	Length 2358.0 mm / 92.8 in
Wheelbase	1630 mm / 64.2 in
Seat Height	Laden2 655.3 mm / 25.8 in Unladen 680.0 mm / 26.8 in
Ground Clearance	142 mm / 5.6 in
Dry Weight	288 kg / 634 lbs
Wet Weight	303 kg / 667 lbs
Fuel Capacity	17.8 Liters / 4.7 US gal
Consumption Average	19.0 km/lit
Standing ¼ Mile	14.4 sec
Top Speed	176.8 km/h