2006 · Cruiser · Buyer's Guide
The Factory Bobber Done Raw
Strip a Dyna back to what a bobber actually needs and this is what's left. The 1449 cc air-cooled 45° V-twin sits rubber-mounted in the frame, good for 67 hp and 81 lb-ft, and it feeds a six-speed gearbox. Everything else got deleted: solo seat, chopped fenders, mini ape-hangers over a Fat Bob tank, one gauge, nothing you don't need. The result is a factory custom that reads as genuinely purist rather than merely styled. At 635 lb it's no lightweight, but the 25.8 in seat drops the mass low enough that the number matters far less on the road than it does on paper.
On the road it's a torque-first machine that wants a tall gear and an open road, and it holds a line at speed better than the raked-out silhouette leads you to expect. Top speed is 115 mph, and 36 mpg out of the 4.7 gal tank sets your rhythm for you. It ages the way a simple air-cooled twin should, which is to say the engine is rarely the problem and the hardware around it is. Buy it for the attitude and for a stance that is about as pure as this segment gets. The caveat is honest: 2006 Dynas built between June and October 2005 fell under a transmission recall for a false neutral indication, so check the VIN before money changes hands.
Spec sheets don't ride bikes, but they set the baseline.
| Power | 67 hp (50 kW) |
|---|---|
| Torque | 81 lb-ft (110 Nm) |
| Displacement | 1449 cc |
| Engine | 45° V-twin |
| Cooling | Air-cooled |
| Gearbox | 6-speed |
| Front brake | 300 mm |
| Front tire | 100/90-19 |
| Rear tire | 160/70-16 |
| Seat height | 25.8 in (655 mm) |
| Wet weight | 635 lb (288 kg) |
| Fuel capacity | 4.7 gal (17.8 L) |
| Top speed | 115 mph (185 km/h) |
| Fuel economy | 36 mpg (US) |
Equipment check
Chassis
Thumb the starter and the air-cooled twin settles into the loping idle that sells this whole motorcycle. The sound is the best part of the experience, and it arrives through the bars and the pegs as much as through your ears. At idle the rubber-mounted engine shakes the mirrors into abstract art; roll on, and it smooths into a steady pulse you feel in your palms rather than fight. The mini apes put your hands high and wide with your shoulders open, and the 25.8 in seat means both boots go flat at a stoplight without any thought. The weight stops existing above walking pace. At highway speeds the wind is what you notice, because there's nothing between you and it and the riding position turns your chest into a sail. Hundred-mile legs, then a stop. That's the natural rhythm.
What follows isn't from a press kit. It's what has come back to me over the years from riders who own these bikes: conversations in parking lots and at club nights, long talks with owners at events, and the messages and emails that land in my inbox asking whether the Street Bob is the right call. For this one the chatter is unusually consistent. The engine and the way it carries itself draw near-universal praise, and the complaints cluster tightly around what happens once the ride stretches past an afternoon.
The Twin Cam 88 comes up before anything else. Owners describe the 1450cc twin as thumping and relaxed, with torque low enough in the rev range that riding at legal speeds stays satisfying rather than frustrating. The chassis surprises people just as often: riders report that the weight disappears once moving, and that the bike takes a corner with more willingness than the numbers suggest. Praise for the six-speed box is steady too, mostly for how calm it makes highway miles. The stripped-back bobber look and the satin paint pull comment from owners and strangers alike, and fit and finish hold up under that attention.
Vibration is the recurring gripe. Riders describe a persistent buzz through the bars and pegs that wears on them over long highway stretches. The single front disc draws similar volume: adequate is the word owners use, and many say they'd want a second disc when carrying a passenger or pushing harder. The riding position gets the third complaint. Tall bars and a forward lean that reads well parked leave a number of owners tired sooner than they'd like, which keeps most of them thinking in day rides rather than tours.
Transmission safety recall (false neutral indication)
Certain 2006 Dyna models built between June and October 2005 were recalled (NHTSA 05V-537) due to a transmission defect that could cause a false neutral indication, potentially allowing the motorcycle to roll while in gear. Dealers repaired the transmission under warranty.
Inner primary bearing failure
Premature wear of the inner primary bearing is a well-documented issue on 2006 Dyna models, often occurring around 15,000–20,000 miles. Symptoms include a whining noise from the primary case. Harley initially offered free replacement every 15,000 miles but later rescinded the policy.
Stator failure
The charging system stator is prone to early failure, often around 15,000 miles, leaving the rider stranded. Replacement of stator and voltage regulator is typically required.
8-degree fuel injector rough idle
Early-production 2006 models used 8-degree fuel injectors that caused rough idle and hesitation when pulling away. Harley later offered a free upgrade to 25-degree injectors to resolve the issue.
Front end clunking noise
Some owners report a pronounced clunk from the front end during compression or steering, possibly due to loose steering head bearings or fork internals. Not all dealers could identify or fix the root cause consistently.
Where this Harley-Davidson Dyna Street Bob FXDB pulls ahead of — or falls behind — its rivals on the numbers, and the typical bike in its class on character.
Power
Torque
Displacement
Wet weight
Top speed
Seat height
Forget spec-sheet bragging. Here's who the Dyna Street Bob FXDB is actually built for.
This is your bike. The stance, the sound, and the solo-seat attitude land exactly where rally culture lives, and it wears your own parts better than almost anything else in the class.
Made for A1A — Florida Atlantic Coast · Black Hills / Sturgis Rally Hub · Daytona Main Street / Bike Week
Fits the slow-route, small-town rhythm well. Plan around the 4.7 gal tank at 36 mpg, and accept that the solo seat and open riding position decide how long your days get.
Made for Acadia National Park · Austin / Handbuilt Motorcycle Show · Blue Ridge Parkway
Not your bike. No screen, no luggage, and a solo seat mean the big park routes will wear you down long before the Dyna does. Look at something built to carry weather and gear.
Made for Beartooth Highway · Blue Ridge Parkway · Going-to-the-Sun Road
If this one isn't quite the fit, these are the bikes worth riding back-to-back against it.
Any price note compares both bikes at the same age — the youngest age both have on the used market — against this Harley-Davidson Dyna Street Bob FXDB. “cheaper/pricier” is what that bike costs second-hand, not how worn it is.
