Motorized Bicycle Engine Mount Block 1.08 inch
Aluminum cupped block for under engine.
This size is for smaller diameter bicycle tubes,
for Frame 1 inch diameter tubes.
Holes approximately 1 1/4 inches apart.
Vintage Frames usually have this size seat post tube.
Can slit one or both hole slots open with an angle grinder
to make block fit a motor with larger bolt spacing or front of motor.