One of my float bowl drain screws has rounded edges on it. I should be able to get it off but I can't tighten it anymore and a bit of gas leaks out over time (very very slow). Anyways, I need to replace the screws.

I looked on mikexs, and while these say fits stock 38mm (stock xs400 is 34, right?), they look like the right drain plugs. It is Part #48-0779 on this page: http://www.mikesxs.net/mikesxs-fuel_system...category_id=4.2

They have screws for stock 34mm carbs but they do not look like the plugs on my carbs.

Thanks.

One of my float bowl drain screws has rounded edges on it. I should be able to get it off but I can't tighten it anymore and a bit of gas leaks out over time (very very slow). Anyways, I need to replace the screws.

I looked on mikexs, and while these say fits stock 38mm (stock xs400 is 34, right?), they look like the right drain plugs. It is Part #48-0779 on this page: http://www.mikesxs.net/mikesxs-fuel_system...category_id=4.2

They have screws for stock 34mm carbs but they do not look like the plugs on my carbs.

Thanks.

yep xs are 34mm, why don't you email and ask for the sizing?