Any 608 skateboard bearing or 688 bearing with adaptor.
It fits into the end of the crankshaft.
Yes, there is no difference between the bearing slot in any scooter wheel. Any bearing will fit any wheel.
Yes, You need access to a shop press to change the wheel bearing.
rod bearings only fit one way
This type of fit is called an interference fit and requires utmost precision to assemble, usually with the assistance of a bearing press too - normally hydraulically actuated. Interference fits ensure absolutely no unwanted movement.
No. Either the inner, or outer, at least one race, has to be a press fit, otherwise it is no longer a bearing that is needed. A bushing would work. With both races turning you eliminate the bearing.
the pilot bearing is on the crank center of the fly wheel, the smallest end of the transmission shaft will fit into it after it is assembled.
It depends on the application of the bearings. If inside a gearbox for example, the best fit would be a press fit of .002, meaning the shaft diameter is .002 smaller than the bearings inside diameter (ID). For other applications where spinning of a bearing on a shaft is of less concern, then a slip fit of .005 or greater is fine as long as the bearing doesn't rock back and forth on the shaft.
Installs bearings and races. Races are usually press-fit, so you need a press to install them.
One with a correct load bearing weight with a heavy lug pattern for best traction control would be the best fit.
It is possible that a Mustang transmission will fit in a Lincoln Mark VII. It is likely that the clutch plate and the pilot bearing will have to be changed.