9 Harley Davidson Rocker Problems [Must Read]

As a longtime motorcycle enthusiast, I’ve ridden a myriad of bikes in my life, but none has captured my heart quite like the Harley Davidson Rocker. 

Yet, even this powerhouse of American engineering isn’t without its shortcomings. 

Let me take you on my journey through the rough roads and the smooth highways as I navigate the various challenges I’ve encountered with my Harley Rocker. 

We will explore all common issues faced by me and other riders over time.

Harley Davidson Rocker Problems

One of the most common problems is with the Rocker’s fuel system. The fuel pump and injector can malfunction, causing poor engine performance or even engine failure. 

However, some riders have experienced issues with the braking system, especially with the brake lines becoming frayed or corroded over time. 

Another concern is the substantial heat generated by the engine, which can lead to discomfort during long rides. 

1. Stock Seat 

The stock seat on the some models has been a point of concern for many riders. Though it’s designed with aesthetics in mind, it does not always provide the required comfort for long-distance rides. 

The issue lies in the seat’s limited padding and lack of lumbar support, which can lead to discomfort and fatigue on longer journeys.

If you’re considering replacing the stock seat, it’s important to consider factors such as the riding position, seat height, and the material used. 

A seat with more padding and back support can significantly enhance comfort levels.

Harley also offers a range of replacement seats, or you may also consider aftermarket options. 

It’s crucial to compare different models and read reviews to make an informed decision. Installation is typically straightforward and can be done with basic tools. 

2. Clicking Noise 

One of the common issues faced by owners is the unsettling clicking noise emanating from the engine. 

This sound is typically indicative of a problem with the valve train, possibly a symptom of valve lash or clearance issue.

The valve lash is the slight gap between the rocker arms and the valve stem that allows for optimal valve operation. 

If the lash is either too tight or too loose, it could cause the clicking or tapping noise you are hearing.

To inspect and adjust the valve lash, follow these steps:

• To adjust the valve lash, you will need a set of feeler gauges, a wrench set, and a service manual for torque specifications. 
• Remove the valve covers on your Rocker to expose the valve train. Refer to your service manual for detailed instructions.
• Using your feeler gauge, check the gap between the rocker arm and the valve stem.
•  Your service manual will specify the correct gap; if the gauge doesn’t fit or is loose, an adjustment is needed.
• If adjustment is required, loosen the locknut on the rocker’s arm and turn the adjusting screw. Tighten or loosen until the correct gap is achieved.
• After making adjustments, recheck the lash with the feeler gauge. If it’s correct, tighten the locknut while holding the adjuster screw in place. Finally, reinstall the valve covers.

3. Poor Fuel Economy 

Harley Rocker motorcycles, while known for their classic design and powerful performance, often face criticism for their poor fuel economy. 

The fuel consumption rates of these motorcycles are significantly higher than other similar-spec models in the market. 

This issue primarily relates to the bike’s weight, engine size, and carburettor setting.

The large V-twin engines on the Rocker models, although offering immense power and torque, are not the most fuel-efficient. 

Their performance is oriented towards speed and power rather than fuel economy, contributing to higher fuel consumption.

Another contributing factor is the Rocker’s curb weight. A heavier motorcycle requires more fuel to move, which in turn reduces miles per gallon (MPG).

The carburettor setting also plays a significant role in fuel economy. If the carburettor is set too rich, it can lead to excessive fuel consumption.

Regular servicing and fine-tuning of the carburettor setting can help optimize the air-fuel mixture and improve fuel economy.

Making efforts to reduce the weight of the bike, adjusting riding habits, and maintaining a regular service schedule can help mitigate these problems to an extent. 

4. Suspension Issue 

The rear suspension, notably, has been reported to provide an overly stiff ride, which results in an uncomfortable experience, primarily over rough terrains. 

Riders have reported feeling every bump, making long-distance rides less enjoyable.

The root cause of this problem often lies in the stock shocks that come with the bike. They are not fully adjustable, offering only a preload adjustment. 

If you’re experiencing this issue, you might consider upgrading your shocks. 

Options like the progressive 422 shocks or the Legends Revo-A are popular among Harley riders for their improved ride quality.

To replace the shocks, you’ll need a basic set of hand tools, including a socket set, wrenches, and a motorcycle lift. 

Start by securing your bike on the lift and removing the saddlebags if your model has them. 

Next, remove the old shocks by loosening the upper and lower mounting bolts. Be careful not to drop the swingarm when doing this, as it can cause damage. 

Install the new shocks using the same mounting points and tighten the bolts to the manufacturer’s recommended torque settings. 

Once everything is back together, give the bike a bounce to make sure everything is seated correctly.

5. Engine Seizure 

One of the most grave issues encountered by Rocker owners is engine seizure. This is a catastrophic failure that can occur due to a lack of proper lubrication or overheating. 

When the engine’s components aren’t adequately lubricated, friction increases, leading to excessive heat. 

Consequently, the engine components expand and may bind together, causing the engine to seize.

An engine seizure presents telltale signs such as knocking sounds, loss of engine power, oil light illumination, and, ultimately, the engine becomes unresponsive. 

If you experience these symptoms, stop riding immediately to prevent further damage.

Preventing engine seizures involves regular maintenance and immediate action at the first sign of trouble. 

Regular oil changes using quality engine oil, keeping the engine cool, and avoiding heavy loads or extremely high speeds can significantly reduce the risk. 

Also, installing an oil pressure gauge can help monitor oil pressure and take action before it’s too late.

If your engine has seized, the repair process can be quite involved. It may require the engine to be completely dismantled, evaluated, and rebuilt or replaced. 

6. Bearing Issues

These small yet crucial components develop problems over time, affecting the performance and safety of the motorcycle.

Bearings, especially wheel bearings, are instrumental in ensuring a smooth and comfortable ride. 

They facilitate the bike’s movements, reducing the effects of friction and maintaining optimum performance.

When these bearings start to wear out or fail, the motorcycle may start exhibiting symptoms like an abnormal humming noise, wobbly movements, or even a loss of control.

To diagnose a bearing issue, it’s important to visually inspect the bearings for any signs of wear or damage. 

If you suspect a problem, it would be best to consult with a professional mechanic who can provide a thorough inspection. 

In the case that the bearings are indeed damaged, they should be replaced immediately to prevent further damage and potential safety risks.

When it comes to replacing bearings on your Harley Rocker, ensure you have the correct tools and the right replacement parts. 

7. Brake Light Switch Issues

This problem typically arises due to the brake light switch’s tendency to fail or become inoperative, which in turn leads to the brake lights remaining either constantly on or off. 

This malfunction can pose a significant safety risk, as it can mislead other drivers about your intentions on the road.

To troubleshoot this issue, begin by inspecting the brake light switch located near the brake pedal. 

If the switch appears damaged or worn out, consider replacing it. Here’s a step-by-step guide on how to replace the brake light switch:

• Start by disconnecting the battery to prevent any electrical mishaps.
• Locate the brake light switch, which is typically found near the brake pedal.
• Use a screwdriver to carefully remove the old brake light switch.
• Install the new switch, ensuring it’s nicely fitted into place.
• Connect the wires back to their respective terminals on the new switch.
• Reconnect the battery and test your brake lights to confirm if the switch replacement has rectified the issue.

8. Chrome Scratching 

Chrome, which adds a sleek and polished look to the bike, is unfortunately prone to scratching. These scratches can significantly diminish the aesthetic appeal of the motorcycle.

Scratches on chrome often occur due to improper cleaning techniques or the use of inappropriate cleaning tools. 

Coarse cloths or cleaning brushes can leave behind micro-scratches, while the use of harsh cleaning agents can erode the chrome finish over time.

To prevent this, always use a soft, non-abrasive cloth for cleaning. Begin by lightly dusting the chrome to remove loose dirt and dust particles. 

Next, use a gentle, chrome-safe cleaning solution to wipe down the chrome parts. Always follow the direction of the grain to avoid creating unnecessary scratches.

If scratches do occur, they can sometimes be remedied at home. Start by cleaning the area as described above. 

Then, apply a small amount of chrome polish to a soft cloth and gently rub it into the scratch in a circular motion. 

Repeat this process a few times, then wipe off the excess polish and buff the area until the scratch blends in with the rest of the chrome.

9. Gearbox Issue 

The gearbox, a critical component of any motorcycle, can display problems such as rough shifting, difficulty in engaging gears, and even transmission lock-up in some extreme cases.

To start with, you may notice that the gear changes are not as smooth as they once were. This could be due to worn-out gear synchros, which aid in the smooth transition between gears. 

Over time and extensive use, these synchros can wear down, making gear shifts feel clunky and less precise.

Another sign of a gearbox issue is difficulty in getting the motorcycle into gear. This is often due to a problem with the clutch, not the gearbox itself. 

The clutch could be failing to fully disengage when it’s pulled, and if it’s not disengaging properly, it can be tough to get the motorcycle into gear while it’s running. 

Regular maintenance and periodic checks can prevent such issues. Finally, in more severe cases, you may experience what’s known as transmission lockup. 

This is where the gearbox fails to engage any gear, effectively leaving your motorcycle immobile. 

This is often a result of prolonged neglect of the above-mentioned issues or a failure in the transmission’s main components.

Harley Davidson Rocker Specifications 

Specification Category	Details
Engine	Air-cooled, Twin Cam 96BTM
Drivetrain
Primary Drive	Chain, 34/46 ratio
Final Drive	Belt, 32/66 ratio
Clutch	Multi-plate, wet
Transmission	6-Speed Cruise Drive
Tires
Front Tire	D408F 90/90-19
Rear Tire	D407 240/40R18
Chassis
Frame Type	Mild steel tubular frame
Swingarm	Mild steel, round tube sections
Front Forks	49 mm telescopic
Rear Shocks	Hidden, horizontal-mounted, coil-over
Weight
As Shipped	686 lbs.
In Running Order	717 lbs.
GVWR	1175 lbs.
GAWR Front	415 lbs.
GAWR Rear	760 lbs.
Capacities
Fuel Capacity	4.9 gal.
Oil Capacity (w/filter)	3.5 qt.
Transmission Capacity	1.0 qt.
Primary Chain Case Capacity	1.0 qt.
Brakes
Front Caliper Type	4-piston
Rear Caliper Type	2-piston
Performance
Engine Torque	92.2 ft. lbs. @ 3000 RPM
Lean Angle (Right/Left)	26.8°
Fuel Economy	35/54 mpg (urban/highway)
Battery	12V, 19-amp/hour, 270 cca
Charging System	Three-phase, 38-amp
Warranty and Service
Warranty	24 months (unlimited mileage)
Service Interval	First 1,000 miles, then every 5,000 miles
Colors and MSRP
Colors Available	Vivid Black Deluxe, Scarlet Red Deluxe, etc.
MSRP	$19,499 (Vivid Black); $19,874 (others)
Dimensions
Length	95.0 in.
Overall Width	35.1 in.
Overall Height	46.0 in.
Seat Height (Laden)	25.2 in. (640 mm)
Seat Height (Unladen)	27.4 in. (696 mm)
Ground Clearance	5.1 in.
Rake (Steering Head)	36°
Fork Angle	37°
Trail	6.2 in.
Wheelbase	69.2 in.

Source: motorcyclenews.com