If the driveshaft screw on your YIKONG YK4061 RC Car repeatedly comes loose, the Longitudinal Shaft Female Threaded Cup Screw Shaft M4 (Part No. 26102) may not be properly tightened, or the threads may be worn. Continuous vibration during off-road driving can also cause the screw to loosen over time.

To prevent this, inspect the threads for damage, tighten the screw with the correct hex driver, and apply a small amount of medium-strength thread-locking compound. If the threads are stripped or the screw is deformed, replace the Longitudinal Shaft Female Threaded Cup Screw Shaft M4 immediately to prevent driveshaft movement or power transmission issues.

Yes. Installing the YIKONG YK4061 RC Car Parts Rear Axle Counterweight Tube (Part No. 26138) increases weight over the rear axle, helping improve rear-wheel traction and overall weight distribution. This can reduce wheel slip when climbing steep slopes or driving over rocks, allowing your YIKONG YK4061 RC Car to maintain better stability and control on challenging terrain.

However, more weight is not always better. Excessive rear axle weight can place additional stress on the drivetrain and motor, so a balanced setup is recommended based on your driving style and terrain.

If your YIKONG YK4061 RC Car develops clicking, knocking, or vibration from the drivetrain, inspect the Longitudinal Universal Joint Shaft – Long (Part No. 26050). Loose retaining screws, worn universal joints, improper installation, or excessive wear on the gearbox or rear axle connection points can all cause abnormal drivetrain noise and reduce power transmission efficiency.

Check that both ends of the driveshaft are fully seated, the retaining screws are securely tightened, and the universal joints move smoothly without excessive play. Replacing worn or damaged components promptly helps restore smooth power delivery and protects the drivetrain of your YIKONG YK4061 RC Car.

If your YIKONG YK4061 RC Car pulls to one side while driving, the Steering Linkage (Part No. 26048) should be one of the first components you inspect. A bent linkage, worn ball ends, incorrect linkage adjustment, or loose mounting screws can all affect front wheel alignment and steering geometry, causing the vehicle to drift instead of driving straight.

Inspect the Steering Linkage for bending, excessive play, or loose hardware, and make sure both linkage rods are adjusted to equal lengths. Replacing worn or damaged components promptly will help restore accurate steering and stable handling for your YIKONG YK4061 RC Car.

It depends on the severity of the corrosion. Light surface rust on the YIKONG YK4061 RC Car Shock Absorber Spring (Part No. 26034) can usually be cleaned and treated with a rust inhibitor. However, if the spring shows deep corrosion, cracks, deformation, or has lost its elasticity, it should be replaced immediately. A weakened spring can reduce suspension performance, affect ride height, and compromise the handling stability of your YIKONG YK4061 RC Car, especially during off-road driving.

To extend the service life of the spring, clean it after driving through mud or water, dry it thoroughly, and inspect it regularly for signs of corrosion or fatigue.

Yes. When replacing the YIKONG YK4061 RC Car Parts Shock Absorber Cylinder (26032), it is recommended to replace the O-rings at the same time. The O-rings work together with the cylinder and shock shaft to create a proper oil seal. Reusing worn, hardened, or damaged O-rings may lead to shock oil leaks, reduced damping performance, and premature wear of the suspension components.

During reassembly, inspect the O-rings for cracks, deformation, or wear. Installing new O-rings with fresh shock oil helps restore reliable sealing, maintain smooth piston movement, and ensure your YIKONG YK4061 RC Car delivers consistent suspension performance on all types of terrain.

If the YIKONG YK4061 RC Car develops poor suspension movement or shock oil leaks after a hard landing or collision, inspect the YIKONG YK4061 RC Car Parts Shock Absorber Shaft (26031). Repeated heavy impacts, high jumps, or severe crashes can bend the shaft, preventing the piston from moving smoothly inside the shock absorber.

A bent Shock Absorber Shaft may also damage the O-rings, increase internal wear, and reduce damping performance. If the shaft is bent, scratched, or heavily worn, it should be replaced promptly to restore smooth suspension operation and protect other shock absorber components.

If the shock absorber on your YIKONG YK4061 RC Car loses damping performance, the YIKONG YK4061 RC Car Parts Shock Absorber Mid-Section Assembly (26028) and related sealing components should be inspected. Worn internal parts, damaged O-rings, contaminated shock oil, improper assembly, or air trapped inside the shock can all reduce damping efficiency and affect suspension performance.

During maintenance, check the Shock Absorber Mid-Section Assembly, O-rings, piston, and shock body for wear or damage. Replacing worn components, using fresh shock oil, and reassembling the shock correctly will help restore smooth damping and keep your YIKONG YK4061 RC Car handling reliably on rough terrain.

If your YIKONG YK4061 RC Car shock absorber is leaking oil, one possible cause is a loose or damaged Shock Absorber Upper Lid (Part No. 26027) or a worn O-ring. A poor seal allows shock oil to escape, reducing damping performance and affecting suspension stability. Inspect the Upper Lid for looseness, check the O-ring for wear or damage, and replace any faulty parts to restore proper sealing and suspension performance.