Im riding xmax250/300 but currently done some upgrade on my bike. (Engine) I would like to ask some question.

1. Xmax300 and xmax400 used the same casis?
2. Can i used xmax400 parts on my xmax 250? Such as tachometer. Front rim? Brake system?
3. What are the deference between both 300 and 400 cc specs?

Thank in advance guys..

Hello, Bob, and welcome!

Someone will know more but AFAIK, Bob, the Xmax400 and Xmax 300 were not a common chassis and don't share major components.

The earliest Xmax 300 shared lots with the Xmax 250 that preceded it. they were a common platform.

The Xmax 400 was a completely different scooter. It might share some minor parts, as is common within ranges.