Common Issues and Simple Fixes for GPX Legend Classic Motorcycles

The GPX Legend motorcycle is well-known for its cumbersome clutch, noisy brakes, unexpected engine shutdown, and frequent throttle malfunctions.

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GPX Legend is a manual motorcycle with a classic design. It is produced by the GPX brand, which is based in Thailand and sold in Vietnam through private import motorcycle dealers. The GPX Legend lineup consists of three models: Legend 150, Legend 200, and Legend 250 Twin. The Legend 150 and Legend 200 models are equipped with a single-cylinder engine, while the Legend 250 Twin model features a twin-cylinder engine, providing a more exhilarating sound.

GPX Legend motorcycle prices for each version

When it comes to pricing, the GPX Legend motorcycles in Vietnam are available at the following prices:

Model Version Dealer price
(VND)
Tentative on-road price
(VND)
GPX Legend Legend 150 52,000,000 58,666,000
Legend 200 63,000,000 70,216,000
Legend 250 Twin 75,000,000 82,816,000

 

With competitive and attractive pricing for its range of classic motorcycles, GPX Legend has quickly caught the attention of Vietnamese users. As a result, there has been a growing demand for this motorcycle model among Vietnamese customers. However, after a period of usage, some issues and minor defects affecting the user experience have emerged. To address these issues and understand how to fix them, continue reading the following article from Tinxe.vn.

GPX Legend 250 Twin in Vietnam

Summary of common issues with the GPX Legend motorcycle

1. Heavy clutch

Users of the GPX Legend have reported a heavy clutch, which requires significant force and can lead to hand fatigue during usage. Research has shown that inadequate lubrication of the clutch cable, convoluted cable routing, and loosely tightened retaining screws are the main contributors to this issue.

2. Stiff gear shift

The process of shifting gears, both up and down, on the GPX Legend is often described as not smooth and challenging. This issue arises due to incomplete running-in of the motorcycle and the lack of optimal mating and synchronization among internal components.

3. Noise from the brake disc and rear brake

During usage, both the front brake disc and the rear brake disc can produce abnormal noise. This occurs due to uneven contact between the brake pads and the disc, resulting in an unpleasant sound.

4. Incorrect fuel gauge

After a period of usage, the fuel gauge on the motorcycle’s fuel tank may display inaccurate readings, leading to situations where riders unexpectedly run out of fuel. This issue is caused by faulty fuel floats from the manufacturer.

5. Incorrect speedometer

Inaccurate speedometer readings are not limited to just the fuel gauge but also affect the motorcycle’s odometer, which displays inaccurate speed measurements and occasionally jumps randomly. This issue is caused by faulty speedometer cables or gearboxes, which are manufacturing defects.

6. Stalling while riding

According to user reports, the GPX Legend motorcycle can experience abnormal stalling. This occurs when the bike is in motion, and the throttle becomes unresponsive, leading to gradual engine stalling. Subsequent attempts to restart the engine may also fail. The main cause of this phenomenon is insufficient lubrication in the engine, resulting in uneven expansion of internal components and a slight engine seizure.

GPX Legend motorcycle stalling while in motion

7. Engine hesitation

Some users have reported that the GPX Legend motorcycle experiences throttle hesitation while accelerating, causing sudden deceleration and posing risks on the road. This issue can be attributed to low-quality spark plugs or high-tension cables, resulting in uneven spark ignition and combustion of the fuel-air mixture inside the combustion chamber, thereby causing throttle hesitation.

8. Loud and hot engine

Many users have also noticed that the GPX Legend engine produces a loud howling noise and becomes quite hot during operation, leading to discomfort and anxiety. While these conditions are considered normal during the running-in period, if the engine continues to emit a loud noise after this period, it may be due to low viscosity engine oil.

Methods for troubleshooting and resolving GPX Legend motorcycle issues

1. Heavy clutch

According to some mechanics, the heavy clutch issue on the GPX Legend motorcycle can be easily rectified by adjusting the retaining screw near the engine block, readjusting the clutch cable play and travel on the clutch lever, and regularly lubricating the clutch cable with appropriate lubricants or grease.

2. Stiff gear shift

This issue usually only occurs during the running-in period of the motorcycle. Users are advised to frequently shift gears to ensure even wear among the components. Once the running-in period is complete, the issue should resolve itself. If the problem persists, users can visit reputable mechanics to replace or modify the clutch spring.

3. Noise from the brake disc and rear brake

If the front brakes produce an uncomfortable squeaking noise, users can sand down the brake pads to achieve even wear and eliminate rubbing against the disc during usage. If the brake pads continue to rub or produce noise over time, users may need to replace both the brake pads and the brake caliper with compatible parts from another motorcycle.

Regarding the rear brake, continuous noise from the brake pad contacting the disc could be a result of air or dirt in the rear caliper, causing constant contact between the brake pads and the disc. Cleaning the brake pedal can help improve the situation, and if the issue persists, users may need to replace both the brake pads and the brake pedal with compatible parts from another motorcycle.

4. Incorrect fuel gauge

To address the issue of an incorrect fuel gauge, users should replace the faulty fuel float with a new one.

5. Incorrect speedometer

Similar to the fuel gauge issue, users need to replace the faulty speedometer cable or gearbox to ensure accurate speed measurement.

6. Stalling while riding

If the engine stalls temporarily due to a slight engine seizure, users can switch to a thinner engine oil (10W-30) to ensure smooth engine operation during the running-in period. It is important to avoid forcing the engine, as it could lead to bearing failure or crankshaft fracture.

7. Engine hesitation

To resolve the issue of throttle hesitation, users should replace the spark plugs and high-tension cables with higher quality ones that provide a more even and powerful spark ignition.

8. Loud engine

If the engine continues to emit a loud howling noise after the running-in period, users can try using a higher viscosity engine oil, such as 10W-50, to reduce engine noise.

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