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YIKONG YK4107 RC Car Upgrade Parts Brass Front Wheel Weights QT22126CNo cutting or grinding is required for non-destructive upgrade. It directly fits the front wheel structure of YIKONG YK4107 RC Car. Check clearance between hub and steering mount before assembly to avoid interference.

The YIKONG YK4107 Bearing 5×11×4 (21120) is a metal ball bearing used in the drivetrain and rotating assemblies of the crawler. Its main function is to reduce friction and ensure smooth rotation of components such as the portal axle gears, differential, or transmission shafts, contributing to the vehicle's reliable 4WD performance....

Grinding or clicking noises from the drivetrain of your YIKONG YK4107 can be caused by worn, dry, or damaged bearings, including the Bearing 12x18x4 (21122). If cleaning and lubrication do not resolve the issue, replacing the bearing is recommended to protect other drivetrain components such as gears and shafts. The YIKONG...

Loose or vague steering on your YIKONG YK4102 is often caused by worn Ball Linkage Ends (13014) developing play at the pivot points. This is a common fault on RC crawlers after extended use. Inspect the linkage ends for excessive play and replace them if worn to restore precise steering response....

If the Trail Turn function on your YIKONG YK4107 is not working, the Rear Brake Cable (21094) may be stretched, disconnected, or broken. Check that the cable is properly connected to both the Trail Turn servo and the rear brake mechanism. Also inspect the brake pads and camshaft for wear or...

YIKONG YK4107 Parts Portal Axle Gear 11t 21t 21040 If the gears feel tight after installing YIKONG YK4107Pro Portal Axle Gears, the issue is often caused by installation rather than the parts themselves. Check that the gears are installed in the correct positions, the bearings are fully seated, the grease...