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3 Most Common Problems With Yamaha XTZ 125

The Yamaha XTZ 125 is an entry-level dirt bike that offers superior off-road performance.

Thanks to its lightweight and rugged design, the XTZ 125 can handle even the roughest road conditions with ease. Moreover, its versatility means it is suitable as either an off-road performer or a street bike.

If you’re looking for an affordable, beginner-friendly bike, the Yamaha XTZ 125 is an ideal choice.

However, it’s advisable to know the common problems associated with these bikes before buying.

In this article, we review the most widespread issues on the Yamaha XTZ 125 models.

Let’s dive into it!

1. Bike Refuses to Start

Starting problems are common on many Yamaha models, including the XTZ 125.

Some owners have complained about facing difficulties when trying to start their bikes.

In one case, an owner tried starting his XTZ 125 bike, but it refused to come to life.

He reported that the starter made a “clicking” noise, and the engine refused to turn over. Although the bike started after multiple attempts, the rider was left frustrated because of the time and effort wasted.

The problem described above is a daily reality for some XTZ 125 owners.

Possible Causes Include:

I. Dead battery:

This is a common cause of starting problems on bikes.

If the engine is turning over slowly or doesn’t turn over, it’s likely the battery’s voltage is low. A good way to know if a bad battery is the cause of the problems is to do a multimeter test.

Typically, the battery should have, at least, 12.5 volts or higher when you test it. Anything below signals that your battery is bad.

II. Bad starter motor:

The XTZ 125 comes with an electric starter and a kick starter.

Symptoms of a bad electric starter include weird noises during start-up, e.g., the “clicking” noise described earlier.

It could also be a buzzing or whirring sound, which means the starter isn’t engaging.

Alternatively, if the bike makes no sound when you try starting it, chances are the starter is faulty.

III. Clogged fuel lines:

If the fuel lines on the motorcycle are blocked, the engine won’t get the fuel it needs to run.

Inspect the bike’s fuel lines and see if there’s any material buildup preventing fuel from flowing.

IV. Improper timing:

If the timing on the bike is off, you’ll have difficulty starting it.

The engine won’t turn over, and you may hear a ticking sound when you turn the ignition. To solve this, you will need to remove the valve cover and ensure valves are in the correct position.

Nevertheless, timing issues can be quite complex, and we’ll advise you to have the timing professionally fixed.

V. Worn or blown fuse:

A faulty fuse would explain why the bike refused to start.

Fuses often wear out with age, meaning they may start to malfunction at some point.

If this happens, the spark plug won’t get the required spark it needs to start the ignition process.

VI. Loose connections:

If the wires in the electrical system are loose, starting the bike may be impossible.

Possible Solutions:

You should inspect all components in the bike’s electrical system, including the ones mentioned above.

If a part needs cleaning, tightening, or replacement, do as needed.

If you do and still don’t get results, take your bike to a professional technician for a look-over.

2. Engine Idling Problems

According to reports from owners, the engine on the XTZ 125 often performs erratically while idling.

In one case, a rider reported that his bike was “cutting out,” i.e., dying at idle. If you were to face the same problem, your bike would stall during warm-ups, which is something you wouldn’t like.

Another owner reported that his XTZ 125 bike was idling roughly, accompanied by excessive shaking.

Some also say that although the bike idles fine, it dies when the throttle is pulled. These problems can be particularly frustrating as they mean more time wasted troubleshooting.

Possible Causes Include:

Dirty carburetor:

The likeliest cause of the idling problems is a dirty carburetor.

If the carburetor is dirty, chances are components like the pilot jets are clogged. Should this be the case, the bike’s idling performance will be markedly erratic.

Stripping the carburetor down to the parts and cleaning them should help solve the problem.

Improper air-fuel mixture:

Another common cause of idling issues is an imbalance in the air-to-fuel ratio in the engine.

Maybe the engine is getting too much air or too much fuel.

Either way, the bike will idle roughly.

The following things can cause an imbalance in the air-fuel ratio:

  1. Clogged fuel lines/fuel filters
  2. Dirty airboxes/air filters
  3. Leaky intake manifold/vacuum lines

Idle Speed Set too High:

Typically, your bike should idle between 950-1050 RPM.

Anything more than this, and you may experience rough idling.

The XTZ 125 bikes have an idle screw that you can adjust to increase/decrease the idle speed. If you detect that the idle speed is too high, try reducing it by turning the idle screw.

You can consult online tutorials/videos for help on modifying the idle speed.

3. Gear Change Issues

A common problem on the XTZ 125 is that it performs erratically when the rider is shifting gears.

An aggrieved owner complained that the gears became stiff and refused to shift. Some also say the bike makes crunching noises when they try to shift gears.

In worst cases, the bike lurches and vibrates under gearshifts.

Gear change issues can ruin an enjoyable ride, as they make it difficult to accelerate.

They could even put riders at risk, especially when riding on busy highways. Here are some possible causes of the problem:

I. Worn-Out Clutch:

If you’re having issues with shifting, a worn-out clutch could be responsible.

Clutches don’t last forever and will wear over time.

A common symptom of tired clutches is hard gearshifts; hence, you should check the condition of your clutch before trying anything else.

II. Bad Clutch Basket:

The clutch basket houses the entire clutch assembly.

If it becomes worn, it can lead to erratic shifting.

We don’t advise to replace the clutch basket on your own as the process is complex.

Have a mechanic do the replacement instead.

General Pros and Cons of the Yamaha XTZ 125

Pros of Yamaha XTZ 125

1. Offers High Level of Comfort

Comfort is important, particularly if you’ll be spending a lot of time on your bike.

The Yamaha XTZ 125 is designed to be as comfortable as possible for riders.

Thanks to its firm seat, you can ride on the XTZ 125 for long and not feel aches of any kind. It has low seat height and low overall weight, making it perfect for different classes of riders.

More importantly, the bike has an upright riding position, which guarantees overall ride comfort.

2. Beginner-Friendly

Although the XTZ 125 is an off-road-focused bike, it is street-legal as well.

With its low weight (it weighs under 260 lbs.) and low power output, it makes for a good beginner bike.

Therefore, if you’re an individual looking to enter the world of two-wheeled machines, the XTZ 125 may be a good starting point.

3. Good for Off-road Use

If you’re looking for a good trail bike or farm bike, the XTZ 125 is an excellent choice.

The tires are All-Terrain tube types, which allow for greater grip both on dry surfaces (gravel, sand) and wet surfaces (water-logged roads, mud). Besides, the suspension-a heavy-duty type-is suitable for rough terrains.

The front suspension comes with long-travel telescopic forks while the rear suspension has a mono-shock.

These features make it easy for the XTZ 125 to absorb bumps on the off-trail.

It is important for off-road bikes to have high ground clearance, and the XTZ 125 doesn’t disappoint in this regard. The bike has a competitive ground clearance of 280mm (11 inches).

Combined with the beefy 21-inch and 18-inch tires, the XTZ 125 can handle just about any uneven terrain.

4. Decent Braking Performance

Even with its modest price tag, the XTZ 125 manages to offer good brakes.

The front-wheel features 240mm hydraulic brakes while the rear wheel uses conventional 180mm drum-type brakes.

As such, you can rest assured knowing your bike offers adequate braking power.

5. Innovative Engine Design

The XTZ 125 model comes with a simple four-stroke, single-cylinder engine that’s easy to service.

Moreover, it is air-cooled and doesn’t have the extra components found on water-cooled engines. This means there’re fewer chances of something failing.

The 124cc engine’s output is decent at 12.34 horsepower and 8.56 lb-ft of torque.

While some may say it’s underpowered, it’s enough to get you across the trail quickly and efficiently.

Cons of Yamaha XTZ 125

Here are some of the XTZ 125’s common problems:

  1. Bike Refuses to Start
  2. Engine Idling Problems
  3. Gear Change Issues

What Do the Reviews Say?

“Commonly seen on dirty trails, off-road training camps, and the roughest roads, the XTZ 125 is a versatile dual-sport motorcycle that has earned the off-roading community’s approval. This rugged and lightweight dual-purpose machine lends itself well to dirt-riding newbies and trail veterans alike, and offers manageable and capable power paired with responsive handling.”

[Source: Topgear.com.ph]

What’s The Resale Value On the Yamaha XTZ 125?

Year Mileage Price ($)
2008 1,234 747
2009 18,000 2,000
2018 3,167 2,422

NB: These prices may vary depending on various factors. In addition, you may have to import these bikes into the U.S.A.

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