Looks like Yoshi has finished one of their slip ons, it still isn't listed on their site but I found this article.
I didn't copy in the youtube video as it is in the article as well.
https://motorsportsnewswire.com/2018/03/02/yoshimura-2018-ninja-400-alpha-t-slip-on/
I didn't copy in the youtube video as it is in the article as well.
https://motorsportsnewswire.com/2018/03/02/yoshimura-2018-ninja-400-alpha-t-slip-on/