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# How to Tighten and Adjust the 2nd Version XF660 Fat Tire Ebike Handlebar Stem

${youtube}[How to Tighten and Adjust the 2nd Version XF660 Fat Tire Ebike Handlebar Stem ?](JxCETvs9hxc)

Just open the Adjustable Handlebar Stem and Use ${color}[#ff0000](2 mm Allen Key Screw Driver) to Tighten and Adjust Stem According to the Video Instruction.


![](https://storage.crisp.chat/users/helpdesk/website/f647b0a9af965000/image_waf2z0.png)
![](https://storage.crisp.chat/users/helpdesk/website/f647b0a9af965000/image_1aphe8a.png)
![](https://storage.crisp.chat/users/helpdesk/website/f647b0a9af965000/image_1lavsnh.png)