Yeah its 160 or like 163. It grew from the 125 and became the JT160. Then Beta released their 200 so GG rebadged TXT200.
I felt ripped off a bit, at first, but in actual fact it is a great engine. Much better than my aircooled beta.
The right jetting helped it a bunch. Also the inlet can use some work with a grinder and packer so it lines up with the reed better.
I'd love mine back.