From youtube "ToykoOffroad"
An Oil Drain Tool (ODT) kit for Beta motorcycles, including Xtrainer 250/300 and 250/300 RR models is now available for sale. The ODT allows you to easily change your transmission oil, without getting oil over the frame and skid plate. Many thanks to Alex in Canada (that's me) for suggesting to make an ODT for Betas and providing feedback and photos during prototyping and trial fitting. If interested please check it out here: http://www.tokyooffroad.com/product/beta-oil-drain-tool-odt-kit/
here is a YouTube video of the tool
https://youtu.be/oiEZPXmHRfc
I helped Mark with the prototype and testing of this beta tool and I have used it and it works as described in the YouTube video. the tool is Machined not cheaply made and will last a lifetime