So, is the old PRC Stalker an American width rail or an International width rail?
(Copied from the Comet Kart Sales site)
What is the difference between International and American Rail?
The distance center to center between the two engine rails determine which type of mount the kart needs. International Measures 3 5/8" and American Measures 3".
Also, another explanation of mount frame widths from Rieken's Racing
https://www.out2win.com/catalog/enginemount.html
It looks like the jackshaft mount from Joes could possibly fit either but, the tapped holes for the bottom clamps might only work for an International width rail.
Brian #89