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".
Almost all race karts are International whether they are made in the US or not.

Adjustable Degree 4-Cycle Mount

Performance Manufacturing 4-Cycle Mounts

Odenthal 2-Cycle Mounts

Odenthal 4-Cycle Mounts

Third Bearing Clutch Support

Jackshaft Kits

Fast Karts Motor Mount

Gem Mounts - Close Out