There is an interesting example of this thinking in the Jeep world. The 2014 Jeep Cherokee is based on an Alfa-Romeo platform. I personally think it is about time that we have 'world bikes' and 'world automobiles'. Europeans have been getting all the good stuff for far too long.
That is fine as long as the platforms are up to the intended duty. Using the same platform for Ford, Lincoln, and Mercury cars worked well. Using a compact car platform for a larger, heavier vehicle (Neon platform for the PT Cruiser and Jeep Compass) didn't work as well and they eat up suspension components. Using the Dart platform for the Jeep Cherokee will probably have the same results.
Using a scooter platform for a small commuter bike makes some sense. Using a scooter platform for a cruiser or big touring bike doesn't.
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