2009-2021 Harley Davidson Dyna Engine
From 2009 to 2021, Harley-Davidson made the Dyna line of motorcycles, which were known for having a classic American cruiser design and strong engine performance. At the heart of these bikes were a variety of powerful V-twin engines, such as the Milwaukee-Eight and Twin Cam engines. These engines have changed over the years to offer more displacement, more torque, and better reliability overall. The unique air-cooled design of these engines made them stand out. They gave riders a unique and intense riding experience with the unmistakable rumble and character that only a Harley Davidson could give. Harley-Davidson slowly made these engines better over the years by adding new technology, improving fuel injection systems, and improving overall engine management for smoother power delivery. This made the Dyna series a lasting symbol of American motorcycle heritage and a favorite among riders who want both classic style and modern performance.
ENGINE IDLE TEMPERATURE
MANAGEMENT SYSTEM
For those riders who frequently find themselves in riding conditions where the vehicle is subjected to prolonged idle conditions or traffic congestion, an optional dealer-enabled engine calibration is available. This calibration offers limited rear cylinder cooling with the vehicle stopped while the engine is left at idle. This option is available for original equipment engine calibrations only. See your dealer for details.
STARTING THE ENGINE
General
CAUTION
The engine should be allowed to run slowly for 15-30 seconds. This will allow the engine to warm up and let oil reach all surfaces needing lubrication. Failure to comply can result in engine damage. (00563b)
Do not roll the throttle before starting. Rolling the throttle before starting the motorcycle is unnecessary.
Starting
WARNING
Shift transmission to neutral before starting the engine to prevent accidental movement, which could result in death or serious injury. (00044a)
- Turn the ignition/headlamp key switch to the IGNITION position. Do not roll the throttle.
NOTE
The engine lamp will light for approximately 4 seconds and you will hear the fuel pump purr for approximately 2 seconds as it operates to fill the fuel lines with gasoline. - See Figure 20. Turn the off/run switch to the RUN position.
- Pull in the clutch lever.
NOTE
To activate the starting system, the clutch interlock circuitry requires that the clutch be disengaged. The clutch lever must be pulled in against the left handlebar grip and/or the transmission must be shifted to the neutral position (with the green neutral lamp lit). - Raise the jiffy stand (required on international models).
- Press the starter button to start the motorcycle.
- When the engine has started, you can operate your motorcycle as you normally would after raising the jiffy stand.
NOTE
If the fuel tank becomes completely dry, it may take a few seconds longer to start the motorcycle after filling the tank. It will not be necessary to take any extraordinary measures before starting the motorcycle.
Figure 20. Right Handlebar Controls
- Engine off/run switch
- Engine start switch
STOPPING THE ENGINE
- Stop the engine by turning OFF the engine stop switch on right handlebar.
- Turn OFF the ignition/headlamp key switch. If the engine should be stalled or stopped in any way, turn off the ignition/headlamp key switch at once to prevent battery discharge.
FAQs
The Harley Davidson Dyna is powered by V-twin engines that are normally between 96 and 103 cubic inches (ci) in size.
Oil volume varies based on the model and engine, but it typically ranges from 3-3.5 quarts.
Harley suggests changing the oil every 5,000 miles, but for model-specific advice, consult your owner’s manual.
You can use synthetic oil in your Dyna engine, and doing so is frequently advised for improved protection and performance
A minimum of 91 octane fuel is what Harley Davidson advises using for Dyna engines.
Spark plugs should be checked and replaced every 10,000 miles or as instructed in your owner’s manual.
You can use aftermarket air filters if they are made for the particular Dyna model and engine you are using.
For detailed recommendations, consult your owner’s manual or the sidewall of your tires. Tire pressure might vary based on the model and the tires
Every 5,000 miles, the drive belt tension should be checked and adjusted as necessary.
While high-quality ethylene glycol-based coolant is also an option, Harley Davidson advises using its own brand.
If your Dyna model has a chain drive, you should clean and lube it in accordance with the instructions in your owner’s manual, usually every 500 to 1,000 miles.
You can utilize aftermarket exhaust systems, but make sure they adhere to local noise ordinances and have minimal impact on engine performance.
Depending on the model and climate, different oil weights may be advised, but generally speaking, 20W-50 is adequate for most situations.
Regularly check the battery and connections, particularly before lengthy trips, and keep the battery terminals corrosive- and dirt-free.
You can conduct simple maintenance like oil changes and air filter replacements, but it’s advised to call a Harley Davidson dealership or a skilled mechanic for more difficult jobs.
Useful Link
View Full PDF: Harley Davidson Dyna 2009-2021 User Manual| Auto User Guide
Instruments: 2009-2021 Harley Davidson Dyna Instruments