GSX1100SXZ.JP
GSX250S Rider
At last I was able to get a genuine vacuum gauge as new old stock. I have been searching for this for a long time. The motor of my katana is broken right now, though. I would like to adjust the carburetor using this gauge soon.
gauge by Takahiro Ikehara, on Flickr
gauge by Takahiro Ikehara, on Flickr