# Duncan butterfly Al

**URL:** <https://forums.yoyoexpert.com/t/duncan-butterfly-al/435505>\
**Category:** General Yo-Yo\
**Created:** [November 3, 2025, 5:04pm UTC](https://forums.yoyoexpert.com/t/duncan-butterfly-al/435505 "2025-11-03T17:04:40Z")\
**Posts on this page:** 1\
**Showing post:** 9

<div class="post-metadata">

**Author:** ![hsb](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/hsb/32/193274_2.png) [@hsb](https://forums.yoyoexpert.com/u/hsb)\
**Post date:** [November 3, 2025, 5:29pm UTC](https://forums.yoyoexpert.com/t/duncan-butterfly-al/435505/9 "2025-11-03T17:29:31Z")

</div>

FWIW, this post shows the original with the caps removed:

> [@Butterfly AL Caps](https://forums.yoyoexpert.com/t/butterfly-al-caps/392377/16):
>
> Goal is just to see how it plays without them. So I’m happy to report, that the caps indeed can be removed. I put a presta valve adapter on my bike pump and it made a perfect seal. 2-3 pumps and BANG! The caps weigh 8 grams each, bringing it from 62g down to 46g! So yeah, it’s super light now and plays kinda weird. laughing

---

_[View the full topic](https://forums.yoyoexpert.com/t/duncan-butterfly-al/435505)._