Uploaded March 2026 | Updated September 2026, 2 weeks ago

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The CB125 has been fighting a stubborn high idle problem. In the previous episode we checked the advance unit and looked for vacuum leaks but still couldn't find the cause.

In this video we test another possibility: the aftermarket carburetor that came on the bike. The carb currently installed is a cheap replacement, so we swap it out with a different replacement carb to see if the issue follows the carb itself.

It turns out the carburetor was likely the source of the high idle all along.

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