Yamaha Rhino 660 Problems And Their Solutions

Common Problems With Yamaha Rhino 660 owners have often encountered various issues with their beloved off-road vehicles.

From mechanical malfunctions to electrical hiccups, the Yamaha Rhino has its fair share of quirks that can leave owners scratching their heads.

But fear not, as we delve into the world of Yamaha Rhino 660 problems and their solutions, you’ll gain valuable insights on how to tackle these challenges head-on.

So buckle up, because we’re about to embark on a thrilling ride through the troubleshooting territory of the Yamaha Rhino!

yamaha rhino 660

Common Yamaha Rhino 660 Problems And Their Solutions

The Yamaha Rhino 660 is an off-road vehicle known for its versatility and performance. However, like any vehicle, it may experience common issues. Here are some common problems associated with the Yamaha Rhino 660 and potential solutions:

1. Starting Problems

Common starting issues in the Yamaha Rhino 660 include difficulty cranking due to a weak battery or corroded/loose battery terminals.

Additionally, problems may stem from a failing ignition switch or faulty connections in the ignition system, leading to intermittent starting troubles.

Solution (Fix): To address starting problems in the Yamaha Rhino 660, begin by testing the battery’s voltage and charging it if needed.

Ensure that battery terminals are clean, tight, and free of corrosion. If the issue persists, inspect the ignition system for loose connections or a malfunctioning ignition switch.

Replacing a weak battery or addressing electrical system faults can often resolve starting difficulties and ensure reliable performance.

2. Starter Problems

Yamaha Rhino 660s may face starter problems, often characterized by a malfunctioning starter motor or issues with the starter’s servo motor.

This can result in difficulties initiating the engine crank, causing the quad to struggle during the start-up process.

Additionally, if the vehicle’s air filter is clogged or dirty, it can impact the air-fuel mixture, affecting the ability of the Rhino to start and idle fine.

Solution (Fix): When addressing starter problems in the Yamaha Rhino 660, start by inspecting the starter motor and its servo motor for any signs of wear or malfunction.

If issues are identified, replacement may be necessary. Additionally, ensure the vehicle’s air filter is clean and unclogged to maintain a proper air-fuel mixture for smooth starts and idle.

3. Engine Problems

Yamaha Rhino 660s may encounter engine problems, ranging from engine failure and suspension issues to electrical malfunctions.

One common issue is a depleted battery, impacting the vehicle’s ability to start and causing engine performance disruptions.

Additionally, internal components of the engine can wear over time, leading to reduced power, rough idling, or even complete engine failure. Ignoring regular maintenance may contribute to these concerns.

Solution (Fix): To address engine problems in the Yamaha Rhino 660, start by checking the battery’s condition and charge.

Regularly maintaining engine components, such as spark plugs, filters, and fluids, is crucial for optimal performance.

If engine failure or significant performance issues persist, it’s essential to consult with a professional mechanic for a thorough inspection.

Addressing any worn or faulty internal parts promptly can prevent further damage and maintain the overall reliability of the vehicle.

4. Transmission Problems

Yamaha Rhino 660s may experience transmission problems, with common issues including transmission slippage and overheating.

A noticeable sign is the driveshaft moving back toward the rear final drive, indicating potential wear or misalignment.

Another concern is when the transmission slips, causing the engine to pop and sputter, especially when in forward gear.

In some cases, transmission overheating can manifest as the reverse light coming on while the ATV is in forward gear. Carburetor issues can also contribute to transmission performance problems.

Solution (Fix): When addressing Yamaha Rhino 660 transmission problems, start by inspecting the driveshaft for wear and ensuring proper alignment.

For transmission slippage, check the fluid level and quality, topping off or replacing it as needed. Overheating issues may require improving cooling systems or addressing fluid problems.

If the reverse light comes on in the forward gear, investigate electrical connections and switches. For engine popping and sputtering, consider carburetor adjustments or cleaning.

5. Gear Shifting Problems

Yamaha Rhino 660s may encounter gear shifting problems, often manifested by a high RPM, especially during gear changes.

Wet clutch issues can lead to difficulties disengaging, affecting the overall shifting system. The shift shaft, a critical component of the transmission, may wear over time, resulting in a challenging and rough shifting experience.

If the idle speed is too high, it can contribute to resistance in shifting gears. Additionally, problems with vacuum lines or shifter components can impact the smooth transition between gears.

Solution (Fix): To resolve gear shifting problems in the Yamaha Rhino 660, start by checking the idle speed and adjusting it if necessary.

Inspect the wet clutch for signs of wear and address any issues with disengaging. Examine the shift shaft for wear or damage and replace it if needed. Ensure proper functioning of vacuum lines and shifter components.

Regular maintenance, including checking fluid levels and adjusting components, contributes to a smoother gear-shifting experience.

6.  Rear Differential Problems

Yamaha Rhino 660s may encounter rear differential problems, often signaled by unusual noises emanating from the rear-drive box.

A common issue is a bad bearing within the differential, leading to increased friction and noise, especially noticeable when the vehicle is in reverse.

Over time, wear and tear on the differential components can contribute to performance issues in this critical part of the side-by-side.

Solution (Fix): To address rear differential problems in the Yamaha Rhino 660, begin by inspecting the differential for any signs of wear, damage, or leaking fluid.

If unusual noises persist, focus on the differential’s bearings, replacing any that show signs of wear. Regular maintenance, including checking fluid levels and ensuring proper alignment, is crucial for preventing rear differential issues.

7. Head Gasket Problem

Yamaha Rhino 660s may experience head gasket problems, a common cause of engine issues. When the head gasket fails, it can result in oil and coolant mixing, leading to engine overheating and potential damage.

Symptoms include coolant loss, white exhaust smoke, or visible coolant in the engine oil, indicating a compromised head gasket. Ignoring these signs may lead to severe engine damage, and the issue should be addressed as soon as possible.

Solution (Fix): To resolve head gasket problems in the Yamaha Rhino 660, it’s crucial to diagnose the issue promptly.

If symptoms suggest a failed head gasket, the gasket should be replaced, and the engine components inspected for any damage.

Addressing the head gasket problem promptly helps prevent further damage to the engine.

Regular maintenance and monitoring of coolant levels can contribute to early detection and fixing head gasket issues before they escalate.

8. CDI Problems

Yamaha Rhino 660s may encounter CDI (Capacitor Discharge Ignition) problems, which can cause electrical issues and impact engine performance.

Symptoms include the Rhino shutting down unexpectedly, difficulties starting, or erratic engine behavior. If the CDI is going bad, it may affect the ignition system, leading to irregular firing of the spark plug.

In some cases, CDI problems can manifest as a blown 10 amp fuse, affecting other electrical components such as the coil and contributing to a 4WD wiring problem.

Solution (Fix): To address CDI problems in the Yamaha Rhino 660, start by checking for blown fuses and addressing any issues with the electrical components, including the coil.

If the Rhino is experiencing unexpected shutdowns or starting difficulties, it’s advisable to inspect the CDI for signs of wear or damage.

In case of a 4WD wiring problem, check the wiring harness for any faults and ensure proper connections.

If you suspect CDI issues, take your Rhino to a qualified mechanic who can perform a thorough inspection of the electrical components and wiring to identify and fix the CDI problems.

9. Steering Problems

Steering problems in Yamaha Rhino 660s can occur, and one of the most common issues is difficulty steering, especially when the ATV is running at high speeds.

This challenge might be true for many 4×4 utility quads. Another issue stems from the throttle body and pull, where the steering system may feel unresponsive or strained, particularly when pushed beyond its limits.

If the steering becomes stiff or unmanageable, it could impact the overall control and handling of the Rhino.

Solution (Fix): To address steering problems in the Yamaha Rhino 660, start by inspecting the steering components for wear or damage.

Regularly check the steering system’s grease points and ensure proper lubrication to reduce friction.

If the throttle body and pull are causing issues, examine these components for any signs of strain or malfunction and address them accordingly.

In cases where steering difficulties persist, it’s advisable to consult with a mechanic for a thorough inspection of the steering system, including the steering column, tie rods, and other related components.

10. Fuel Pump Problems

Yamaha Rhino 660s may face fuel pump problems, with one common issue being bad pumps with diaphragm leaks. Unlike intermittent issues, bad pumps with diaphragm leaks consistently affect fuel delivery, leading to potential starting problems.

If the fuel pump is compromised, the engine may experience supply problems, resulting in symptoms such as stalling or hesitation during acceleration.

Additionally, vapor locking problems can occur, disrupting the fuel flow and causing issues with the engine’s crankshaft and piston operation.

Solution (Fix): To resolve fuel pump problems in the Yamaha Rhino 660, start by inspecting the fuel pump for diaphragm leaks. If a leak is detected, replacing the fuel pump is essential for consistent fuel delivery.

Additionally, check the fuel lines and connections for any signs of damage or blockages that may contribute to supply problems. Addressing vapor locking problems may involve checking the fuel system for proper ventilation and ensuring the fuel pump relay is functioning correctly.

If fuel delivery issues persist, consult with a mechanic experienced in UTV (Utility Task Vehicle) systems for a comprehensive inspection and proper replacement of the fuel pump.

Frequently Asked Questions

How fast will a Yamaha Rhino 660 go?

The Yamaha Rhino 660 has a top speed of approximately 40-45 miles per hour (64-72 kilometers per hour).

How much weight can a Yamaha Rhino 660 pull?

The Yamaha Rhino 660 has a towing capacity of around 1,100 pounds.

Does a Yamaha Rhino 660 have a dump bed?

No, the Yamaha Rhino 660 does not come with a dump bed. It features a cargo bed at the rear, but it is not designed to dump or tilt for easy unloading.

Does Yamaha Rhino have power steering?

No, the Yamaha Rhino 660 does not come with power steering.

What engine is in a Yamaha Rhino 660?

The Yamaha Rhino 660’s engine is equipped with a 660cc liquid-cooled, four-stroke engine.


The Yamaha Rhino 660, recognized as one of the best 4×4 utility quad bikes on the market, is not immune to various problems.

While its robust design enhances the resistance to dust and debris, users may encounter issues such as starting troubles, steering challenges, or fuel pump problems. It is advisable to consult the user manual for regular maintenance guidelines and address any concerns promptly.

When facing more complex issues, taking the Rhino to a mechanic or a Yamaha dealer ensures a thorough inspection and appropriate solutions, maintaining the reliability of this versatile UTV.

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