# How to Fine Tune a yoyo

**URL:** https://forums.yoyoexpert.com/t/how-to-fine-tune-a-yoyo/80402
**Category:** Yo-Yo Mods and Maintenance
**Created:** [May 10, 2016, 6:54am UTC](https://forums.yoyoexpert.com/t/how-to-fine-tune-a-yoyo/80402 "2016-05-10T06:54:53Z")
**Posts on this page:** 1
**Showing post:** 8

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### Author: ![codinghorror](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/codinghorror/32/8052_2.png) [@codinghorror](https://forums.yoyoexpert.com/u/codinghorror)
#### Post date: [January 21, 2019, 4:11am UTC](https://forums.yoyoexpert.com/t/how-to-fine-tune-a-yoyo/80402/8 "2019-01-21T04:11:36Z")

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> [@zslane](#):
>
> Okay, but _why_ do these tweaks work to reduce vibe? I want to understand how they accomplish _anything_ related to vibe.

Minor alignment problems with the axle, or the bearing being loose around the bearing seat and thus shifting in position when screwed together, have magnified effects on a yo-yo. The center of the yo-yo is basically where all meaningful “vibe” comes from.

The exception is bimetals, where the rings can be misaligned, etc… but on a monometal, the center is the whole game.

> [@zslane](#):
>
> Isn’t the most common cause of vibe a lack of symmetry in the machined (or molded) halves of the yoyo, something that can’t be fixed by making mere changes to the axle or bearing?

I used to think that too, until I ran [these tests](https://forums.yoyoexpert.com/t/what-is-yo-yo-vibe-and-how-do-i-test-for-it/291714/3). Science. It frickin’ works.

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