Originally Posted by Carter Pewterschmidt
All XL carbs I've seen use the standard slot type Keihin jet. They are the 99101-393 type shown here on the site I purchase jets from. It's a standard street carb style jet. The same as were in my ZR550 Kawasaki. On this page they're the forth one down the page.
The XR carbs with the quick change float bowls use the hex type jet shown as 99101-357 on that same site. Sounds like you may have those.
Thanks Carter i think i have it sorted