Most beginners get this step wrong when assembling the TAMIYA TT-02 spur gear. The metal pin must slide into the groove and align perfectly with the hole before installation. If the groove isn’t lined up correctly, the assembly can bind, wear prematurely, or fail during operation.

In this 65-second tutorial, I demonstrate the correct way to install the TT-02 spur gear pin so your drivetrain operates smoothly and reliably.

Whether you’re building your first TT-02 or performing maintenance on an existing chassis, paying attention to this small detail can save you time, frustration, and replacement parts later.

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